./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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-cav19/array_init_nondet_vars.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 10:30:04,734 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 10:30:04,736 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 10:30:04,780 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 10:30:04,780 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 10:30:04,782 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 10:30:04,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 10:30:04,786 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 10:30:04,787 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 10:30:04,791 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 10:30:04,792 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 10:30:04,794 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 10:30:04,794 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 10:30:04,796 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 10:30:04,797 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 10:30:04,800 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 10:30:04,801 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 10:30:04,803 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 10:30:04,804 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 10:30:04,811 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 10:30:04,813 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 10:30:04,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 10:30:04,814 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 10:30:04,815 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 10:30:04,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 10:30:04,823 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 10:30:04,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 10:30:04,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 10:30:04,824 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 10:30:04,825 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 10:30:04,826 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 10:30:04,826 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 10:30:04,827 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 10:30:04,828 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 10:30:04,829 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 10:30:04,829 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 10:30:04,830 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 10:30:04,830 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 10:30:04,830 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 10:30:04,830 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 10:30:04,831 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 10:30:04,833 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 10:30:04,834 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 10:30:04,864 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 10:30:04,865 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 10:30:04,865 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 10:30:04,865 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 10:30:04,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 10:30:04,866 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 10:30:04,867 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 10:30:04,867 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 10:30:04,867 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 10:30:04,868 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 10:30:04,868 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 10:30:04,868 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 10:30:04,869 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 10:30:04,869 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 10:30:04,869 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 10:30:04,869 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 10:30:04,869 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 10:30:04,869 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 10:30:04,870 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 10:30:04,871 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 10:30:04,871 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 10:30:04,872 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 10:30:04,872 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 10:30:04,872 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 10:30:04,872 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:30:04,872 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 10:30:04,873 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 10:30:04,873 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 10:30:04,873 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 10:30:04,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 10:30:04,873 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 10:30:04,874 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 10:30:04,874 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 10:30:04,874 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b36a429fc2ac304c1da00c90b438bd7c9bbfb7e9d7c6704fc9e7805ab1ca424f [2022-07-22 10:30:05,128 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 10:30:05,144 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 10:30:05,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 10:30:05,147 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 10:30:05,148 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 10:30:05,149 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-07-22 10:30:05,210 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200db32d1/f393698ade994852a5242a406acc3472/FLAG05e7f57f5 [2022-07-22 10:30:05,614 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 10:30:05,615 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-cav19/array_init_nondet_vars.c [2022-07-22 10:30:05,620 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200db32d1/f393698ade994852a5242a406acc3472/FLAG05e7f57f5 [2022-07-22 10:30:05,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/200db32d1/f393698ade994852a5242a406acc3472 [2022-07-22 10:30:05,636 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 10:30:05,637 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 10:30:05,639 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 10:30:05,639 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 10:30:05,642 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 10:30:05,643 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,644 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63f9c4c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05, skipping insertion in model container [2022-07-22 10:30:05,644 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 10:30:05,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 10:30:05,793 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-cav19/array_init_nondet_vars.c[413,426] [2022-07-22 10:30:05,810 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:30:05,817 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 10:30:05,829 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-cav19/array_init_nondet_vars.c[413,426] [2022-07-22 10:30:05,834 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 10:30:05,848 INFO L208 MainTranslator]: Completed translation [2022-07-22 10:30:05,848 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05 WrapperNode [2022-07-22 10:30:05,848 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 10:30:05,849 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 10:30:05,849 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 10:30:05,849 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 10:30:05,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,860 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,878 INFO L137 Inliner]: procedures = 15, calls = 16, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 55 [2022-07-22 10:30:05,878 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 10:30:05,879 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 10:30:05,879 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 10:30:05,879 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 10:30:05,884 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,885 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,887 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,887 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,890 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,893 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 10:30:05,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 10:30:05,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 10:30:05,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 10:30:05,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (1/1) ... [2022-07-22 10:30:05,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 10:30:05,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:05,923 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) [2022-07-22 10:30:05,926 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 [2022-07-22 10:30:05,954 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 10:30:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-07-22 10:30:05,955 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-07-22 10:30:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 10:30:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 10:30:05,955 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 10:30:05,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 10:30:05,959 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 10:30:05,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 10:30:05,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 10:30:06,020 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 10:30:06,022 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 10:30:06,188 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 10:30:06,193 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 10:30:06,193 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 10:30:06,195 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:30:06 BoogieIcfgContainer [2022-07-22 10:30:06,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 10:30:06,197 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 10:30:06,203 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 10:30:06,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 10:30:06,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 10:30:05" (1/3) ... [2022-07-22 10:30:06,207 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa5499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:30:06, skipping insertion in model container [2022-07-22 10:30:06,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 10:30:05" (2/3) ... [2022-07-22 10:30:06,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa5499 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 10:30:06, skipping insertion in model container [2022-07-22 10:30:06,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 10:30:06" (3/3) ... [2022-07-22 10:30:06,209 INFO L111 eAbstractionObserver]: Analyzing ICFG array_init_nondet_vars.c [2022-07-22 10:30:06,222 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 10:30:06,223 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 10:30:06,265 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 10:30:06,270 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@3660eef8, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@6bc97d55 [2022-07-22 10:30:06,271 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 10:30:06,274 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:30:06,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 10:30:06,280 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:06,280 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:06,281 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:06,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:06,285 INFO L85 PathProgramCache]: Analyzing trace with hash -687560493, now seen corresponding path program 1 times [2022-07-22 10:30:06,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:06,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728368303] [2022-07-22 10:30:06,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:06,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:06,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:06,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:30:06,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:06,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728368303] [2022-07-22 10:30:06,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728368303] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:30:06,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:30:06,533 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 10:30:06,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592388422] [2022-07-22 10:30:06,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:30:06,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 10:30:06,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:06,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 10:30:06,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:30:06,561 INFO L87 Difference]: Start difference. First operand has 25 states, 19 states have (on average 1.368421052631579) internal successors, (26), 20 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:30:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:06,581 INFO L93 Difference]: Finished difference Result 47 states and 63 transitions. [2022-07-22 10:30:06,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 10:30:06,583 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-07-22 10:30:06,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:06,590 INFO L225 Difference]: With dead ends: 47 [2022-07-22 10:30:06,591 INFO L226 Difference]: Without dead ends: 21 [2022-07-22 10:30:06,595 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 10:30:06,604 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:06,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:30:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-07-22 10:30:06,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-07-22 10:30:06,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:30:06,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2022-07-22 10:30:06,649 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2022-07-22 10:30:06,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:06,650 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2022-07-22 10:30:06,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 10:30:06,651 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2022-07-22 10:30:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-07-22 10:30:06,653 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:06,653 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:06,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 10:30:06,654 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:06,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:06,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1294753969, now seen corresponding path program 1 times [2022-07-22 10:30:06,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:06,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087569589] [2022-07-22 10:30:06,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:06,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:06,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:06,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:06,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:06,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:06,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 10:30:06,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:06,779 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087569589] [2022-07-22 10:30:06,779 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087569589] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 10:30:06,779 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 10:30:06,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 10:30:06,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503254958] [2022-07-22 10:30:06,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 10:30:06,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 10:30:06,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:06,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 10:30:06,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 10:30:06,782 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 10:30:06,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:06,828 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-07-22 10:30:06,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 10:30:06,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-07-22 10:30:06,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:06,830 INFO L225 Difference]: With dead ends: 39 [2022-07-22 10:30:06,830 INFO L226 Difference]: Without dead ends: 31 [2022-07-22 10:30:06,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 10:30:06,838 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:06,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 50 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:30:06,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-22 10:30:06,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 22. [2022-07-22 10:30:06,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 10:30:06,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2022-07-22 10:30:06,852 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 19 [2022-07-22 10:30:06,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:06,854 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2022-07-22 10:30:06,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-07-22 10:30:06,857 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2022-07-22 10:30:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 10:30:06,858 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:06,859 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:06,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 10:30:06,859 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:06,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:06,860 INFO L85 PathProgramCache]: Analyzing trace with hash -554531054, now seen corresponding path program 1 times [2022-07-22 10:30:06,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:06,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675257315] [2022-07-22 10:30:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:06,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:07,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:07,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:07,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:07,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:07,055 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 10:30:07,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:07,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675257315] [2022-07-22 10:30:07,056 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675257315] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:07,056 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024073298] [2022-07-22 10:30:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:07,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:07,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:07,063 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) [2022-07-22 10:30:07,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-22 10:30:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:07,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2022-07-22 10:30:07,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:07,383 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 [2022-07-22 10:30:07,432 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 10:30:07,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 10:30:07,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:07,544 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-07-22 10:30:07,549 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 32 treesize of output 28 [2022-07-22 10:30:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 10:30:07,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024073298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:07,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:07,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 16 [2022-07-22 10:30:07,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345328231] [2022-07-22 10:30:07,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:07,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-07-22 10:30:07,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-07-22 10:30:07,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2022-07-22 10:30:07,773 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 10:30:08,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:08,064 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-07-22 10:30:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 10:30:08,065 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 27 [2022-07-22 10:30:08,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:08,066 INFO L225 Difference]: With dead ends: 48 [2022-07-22 10:30:08,066 INFO L226 Difference]: Without dead ends: 46 [2022-07-22 10:30:08,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2022-07-22 10:30:08,070 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 63 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:08,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 149 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:30:08,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-07-22 10:30:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 29. [2022-07-22 10:30:08,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 10:30:08,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-07-22 10:30:08,086 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 27 [2022-07-22 10:30:08,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:08,087 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-07-22 10:30:08,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 12 states have internal predecessors, (29), 3 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2022-07-22 10:30:08,087 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-07-22 10:30:08,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-07-22 10:30:08,090 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:08,090 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:08,117 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:08,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:08,304 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:08,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:08,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1909003512, now seen corresponding path program 1 times [2022-07-22 10:30:08,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:08,304 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2683236] [2022-07-22 10:30:08,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:08,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:08,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:08,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:08,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:08,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:08,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:08,412 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:30:08,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:08,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2683236] [2022-07-22 10:30:08,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2683236] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:08,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687073615] [2022-07-22 10:30:08,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:08,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:08,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:08,418 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) [2022-07-22 10:30:08,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-22 10:30:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:08,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-22 10:30:08,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:30:08,516 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:08,554 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:30:08,554 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687073615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:08,555 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:08,555 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-22 10:30:08,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142807095] [2022-07-22 10:30:08,555 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:08,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-22 10:30:08,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:08,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-22 10:30:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-22 10:30:08,557 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 10:30:08,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:08,625 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2022-07-22 10:30:08,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 10:30:08,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 31 [2022-07-22 10:30:08,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:08,627 INFO L225 Difference]: With dead ends: 53 [2022-07-22 10:30:08,627 INFO L226 Difference]: Without dead ends: 41 [2022-07-22 10:30:08,627 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-22 10:30:08,628 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 38 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:08,628 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 82 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 10:30:08,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-22 10:30:08,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 26. [2022-07-22 10:30:08,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 10:30:08,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2022-07-22 10:30:08,633 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 31 [2022-07-22 10:30:08,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:08,634 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2022-07-22 10:30:08,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 3 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2022-07-22 10:30:08,634 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2022-07-22 10:30:08,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-07-22 10:30:08,635 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:08,635 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:08,654 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:08,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-22 10:30:08,848 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:08,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:08,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1118110763, now seen corresponding path program 2 times [2022-07-22 10:30:08,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:08,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174357509] [2022-07-22 10:30:08,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:08,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:08,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:09,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:09,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:09,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:09,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:09,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:09,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:09,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:09,124 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:30:09,124 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:09,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174357509] [2022-07-22 10:30:09,125 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174357509] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:09,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298447908] [2022-07-22 10:30:09,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:30:09,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:09,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:09,132 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) [2022-07-22 10:30:09,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-22 10:30:09,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:30:09,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:09,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 10:30:09,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:09,263 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 [2022-07-22 10:30:09,355 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:09,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:09,383 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 10:30:09,403 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-07-22 10:30:09,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:09,503 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:09,506 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 37 treesize of output 33 [2022-07-22 10:30:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:30:09,654 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298447908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:09,654 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:09,654 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-07-22 10:30:09,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678743010] [2022-07-22 10:30:09,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:09,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 10:30:09,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:09,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 10:30:09,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-07-22 10:30:09,657 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-22 10:30:09,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:09,916 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2022-07-22 10:30:09,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 10:30:09,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 35 [2022-07-22 10:30:09,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:09,919 INFO L225 Difference]: With dead ends: 55 [2022-07-22 10:30:09,919 INFO L226 Difference]: Without dead ends: 53 [2022-07-22 10:30:09,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 7 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2022-07-22 10:30:09,920 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 51 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:09,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 178 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 248 Invalid, 0 Unknown, 32 Unchecked, 0.2s Time] [2022-07-22 10:30:09,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-07-22 10:30:09,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2022-07-22 10:30:09,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 10:30:09,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 48 transitions. [2022-07-22 10:30:09,928 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 48 transitions. Word has length 35 [2022-07-22 10:30:09,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:09,928 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 48 transitions. [2022-07-22 10:30:09,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 1.8571428571428572) internal successors, (39), 17 states have internal predecessors, (39), 6 states have call successors, (7), 2 states have call predecessors, (7), 3 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-22 10:30:09,929 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 48 transitions. [2022-07-22 10:30:09,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-07-22 10:30:09,929 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:09,930 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:09,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:10,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:10,153 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:10,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:10,154 INFO L85 PathProgramCache]: Analyzing trace with hash 1711359563, now seen corresponding path program 2 times [2022-07-22 10:30:10,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:10,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198435837] [2022-07-22 10:30:10,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:10,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:10,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:10,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:10,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:10,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:10,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:10,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:10,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:10,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:10,327 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:30:10,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:10,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198435837] [2022-07-22 10:30:10,327 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198435837] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:10,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068710013] [2022-07-22 10:30:10,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:30:10,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:10,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:10,329 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) [2022-07-22 10:30:10,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-22 10:30:10,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:30:10,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:10,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 10:30:10,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:10,504 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 [2022-07-22 10:30:10,708 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 10:30:10,708 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 25 treesize of output 12 [2022-07-22 10:30:10,737 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:30:10,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:10,949 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-07-22 10:30:10,952 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 42 treesize of output 36 [2022-07-22 10:30:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:30:11,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068710013] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:11,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:11,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 32 [2022-07-22 10:30:11,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914158618] [2022-07-22 10:30:11,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:11,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 10:30:11,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:11,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 10:30:11,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=862, Unknown=0, NotChecked=0, Total=992 [2022-07-22 10:30:11,172 INFO L87 Difference]: Start difference. First operand 41 states and 48 transitions. Second operand has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 10:30:11,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:11,606 INFO L93 Difference]: Finished difference Result 54 states and 61 transitions. [2022-07-22 10:30:11,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 10:30:11,607 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 39 [2022-07-22 10:30:11,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:11,607 INFO L225 Difference]: With dead ends: 54 [2022-07-22 10:30:11,607 INFO L226 Difference]: Without dead ends: 42 [2022-07-22 10:30:11,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=296, Invalid=1774, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 10:30:11,609 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 30 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:11,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 237 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 185 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2022-07-22 10:30:11,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-07-22 10:30:11,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2022-07-22 10:30:11,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 6 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 10:30:11,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-07-22 10:30:11,615 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 39 [2022-07-22 10:30:11,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:11,615 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-07-22 10:30:11,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.75) internal successors, (56), 27 states have internal predecessors, (56), 7 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 10:30:11,615 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-07-22 10:30:11,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-22 10:30:11,616 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:11,616 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:11,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:11,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:11,819 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:11,820 INFO L85 PathProgramCache]: Analyzing trace with hash -181817714, now seen corresponding path program 3 times [2022-07-22 10:30:11,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:11,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034373754] [2022-07-22 10:30:11,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:11,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:12,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:12,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:12,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:12,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:12,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:12,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:12,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:12,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:12,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:12,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:12,085 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 10:30:12,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:12,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034373754] [2022-07-22 10:30:12,086 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034373754] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:12,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051313798] [2022-07-22 10:30:12,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:30:12,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:12,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:12,088 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) [2022-07-22 10:30:12,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-22 10:30:12,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-07-22 10:30:12,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:12,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 10:30:12,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:12,254 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 [2022-07-22 10:30:12,401 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:30:12,402 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:30:12,456 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:12,484 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 19 proven. 26 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-07-22 10:30:12,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:12,575 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:12,579 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 37 treesize of output 33 [2022-07-22 10:30:12,706 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 10:30:12,706 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051313798] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:12,706 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:12,707 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 24 [2022-07-22 10:30:12,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580495135] [2022-07-22 10:30:12,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:12,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 10:30:12,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:12,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 10:30:12,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=473, Unknown=0, NotChecked=0, Total=552 [2022-07-22 10:30:12,709 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 10:30:13,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:13,000 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2022-07-22 10:30:13,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 10:30:13,001 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 47 [2022-07-22 10:30:13,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:13,002 INFO L225 Difference]: With dead ends: 60 [2022-07-22 10:30:13,002 INFO L226 Difference]: Without dead ends: 58 [2022-07-22 10:30:13,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=1016, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 10:30:13,003 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:13,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 254 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 256 Invalid, 0 Unknown, 49 Unchecked, 0.1s Time] [2022-07-22 10:30:13,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-07-22 10:30:13,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2022-07-22 10:30:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 10:30:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2022-07-22 10:30:13,011 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 47 [2022-07-22 10:30:13,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:13,011 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2022-07-22 10:30:13,011 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 20 states have internal predecessors, (53), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 10:30:13,012 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2022-07-22 10:30:13,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 10:30:13,012 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:13,013 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:13,038 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:13,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:13,234 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:13,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:13,235 INFO L85 PathProgramCache]: Analyzing trace with hash 513051739, now seen corresponding path program 3 times [2022-07-22 10:30:13,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:13,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420589489] [2022-07-22 10:30:13,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:13,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:13,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:13,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:13,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:13,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:13,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:13,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:13,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:13,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:13,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:13,411 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:30:13,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:13,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420589489] [2022-07-22 10:30:13,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420589489] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:13,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651525298] [2022-07-22 10:30:13,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:30:13,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:13,413 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:13,414 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) [2022-07-22 10:30:13,419 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-22 10:30:13,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-22 10:30:13,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:13,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 10:30:13,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:13,565 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 [2022-07-22 10:30:13,640 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:13,641 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:13,700 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:13,700 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:13,775 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:13,775 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:13,795 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 10:30:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 34 proven. 36 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-07-22 10:30:13,816 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:13,971 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:13,974 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 37 treesize of output 33 [2022-07-22 10:30:14,072 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 6 proven. 40 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2022-07-22 10:30:14,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651525298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:14,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:14,073 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 13] total 22 [2022-07-22 10:30:14,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926629230] [2022-07-22 10:30:14,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:14,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 10:30:14,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:14,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 10:30:14,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2022-07-22 10:30:14,075 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-22 10:30:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:14,392 INFO L93 Difference]: Finished difference Result 71 states and 75 transitions. [2022-07-22 10:30:14,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-07-22 10:30:14,393 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) Word has length 51 [2022-07-22 10:30:14,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:14,395 INFO L225 Difference]: With dead ends: 71 [2022-07-22 10:30:14,396 INFO L226 Difference]: Without dead ends: 69 [2022-07-22 10:30:14,397 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 15 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2022-07-22 10:30:14,398 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 41 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 22 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:14,398 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 255 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 356 Invalid, 0 Unknown, 22 Unchecked, 0.2s Time] [2022-07-22 10:30:14,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-22 10:30:14,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 53. [2022-07-22 10:30:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 10:30:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 57 transitions. [2022-07-22 10:30:14,418 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 57 transitions. Word has length 51 [2022-07-22 10:30:14,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:14,419 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 57 transitions. [2022-07-22 10:30:14,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 18 states have internal predecessors, (46), 7 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 9 states have call predecessors, (11), 7 states have call successors, (11) [2022-07-22 10:30:14,419 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 57 transitions. [2022-07-22 10:30:14,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-07-22 10:30:14,422 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:14,422 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:14,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:14,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:14,647 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:14,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:14,647 INFO L85 PathProgramCache]: Analyzing trace with hash -581569404, now seen corresponding path program 4 times [2022-07-22 10:30:14,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:14,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759889976] [2022-07-22 10:30:14,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:14,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:14,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:14,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:14,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:14,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:14,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:14,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:14,956 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 10:30:14,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:14,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759889976] [2022-07-22 10:30:14,956 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759889976] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:14,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938567577] [2022-07-22 10:30:14,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:30:14,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:14,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:14,958 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) [2022-07-22 10:30:14,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-22 10:30:15,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:30:15,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 29 conjunts are in the unsatisfiable core [2022-07-22 10:30:15,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:15,154 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 [2022-07-22 10:30:15,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 10:30:15,259 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 10:30:15,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:15,356 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-07-22 10:30:15,359 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 32 treesize of output 28 [2022-07-22 10:30:15,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938567577] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:15,435 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:30:15,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2022-07-22 10:30:15,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744680094] [2022-07-22 10:30:15,438 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:15,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 10:30:15,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:15,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 10:30:15,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=771, Unknown=0, NotChecked=0, Total=870 [2022-07-22 10:30:15,440 INFO L87 Difference]: Start difference. First operand 53 states and 57 transitions. Second operand has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-22 10:30:16,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:16,210 INFO L93 Difference]: Finished difference Result 86 states and 91 transitions. [2022-07-22 10:30:16,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 10:30:16,210 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) Word has length 51 [2022-07-22 10:30:16,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:16,211 INFO L225 Difference]: With dead ends: 86 [2022-07-22 10:30:16,211 INFO L226 Difference]: Without dead ends: 84 [2022-07-22 10:30:16,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 61 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=352, Invalid=2098, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 10:30:16,213 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 156 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:16,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 285 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:30:16,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-07-22 10:30:16,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2022-07-22 10:30:16,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 10:30:16,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-22 10:30:16,223 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 51 [2022-07-22 10:30:16,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:16,223 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-22 10:30:16,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2916666666666665) internal successors, (55), 21 states have internal predecessors, (55), 8 states have call successors, (9), 1 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-22 10:30:16,224 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-22 10:30:16,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 10:30:16,224 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:16,225 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:16,251 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:16,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:16,440 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:16,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:16,441 INFO L85 PathProgramCache]: Analyzing trace with hash 2001937361, now seen corresponding path program 5 times [2022-07-22 10:30:16,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:16,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308049912] [2022-07-22 10:30:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:16,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:16,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:16,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:16,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:16,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:16,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:16,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:16,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:16,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:16,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:16,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:16,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:16,621 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 45 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:30:16,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:16,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308049912] [2022-07-22 10:30:16,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308049912] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:16,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842089641] [2022-07-22 10:30:16,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:30:16,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:16,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:16,623 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) [2022-07-22 10:30:16,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-22 10:30:16,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 10:30:16,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:16,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-22 10:30:16,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:16,806 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 [2022-07-22 10:30:16,883 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:16,883 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:16,957 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:16,958 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:16,993 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:17,018 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 32 proven. 42 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-07-22 10:30:17,018 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:17,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:17,155 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 37 treesize of output 33 [2022-07-22 10:30:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 9 proven. 44 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-07-22 10:30:17,272 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [842089641] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:17,272 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:17,272 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2022-07-22 10:30:17,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321245726] [2022-07-22 10:30:17,272 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:17,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 10:30:17,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:17,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 10:30:17,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2022-07-22 10:30:17,274 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-22 10:30:17,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:17,571 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-07-22 10:30:17,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 10:30:17,571 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) Word has length 55 [2022-07-22 10:30:17,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:17,572 INFO L225 Difference]: With dead ends: 73 [2022-07-22 10:30:17,572 INFO L226 Difference]: Without dead ends: 71 [2022-07-22 10:30:17,573 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 100 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 10:30:17,573 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:17,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 201 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 321 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-07-22 10:30:17,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-07-22 10:30:17,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 57. [2022-07-22 10:30:17,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 46 states have (on average 1.065217391304348) internal successors, (49), 46 states have internal predecessors, (49), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 10:30:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-07-22 10:30:17,581 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 55 [2022-07-22 10:30:17,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:17,581 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-07-22 10:30:17,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 21 states have internal predecessors, (58), 8 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (11), 10 states have call predecessors, (11), 8 states have call successors, (11) [2022-07-22 10:30:17,582 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-07-22 10:30:17,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-07-22 10:30:17,582 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:17,582 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:17,610 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:17,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-22 10:30:17,796 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:17,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:17,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1453174918, now seen corresponding path program 6 times [2022-07-22 10:30:17,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:17,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829138526] [2022-07-22 10:30:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:17,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:17,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:17,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:17,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:17,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:17,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:17,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:17,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:17,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:17,891 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 10:30:17,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:17,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829138526] [2022-07-22 10:30:17,892 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829138526] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:17,892 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356004376] [2022-07-22 10:30:17,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:30:17,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:17,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:17,896 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) [2022-07-22 10:30:17,904 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-22 10:30:17,957 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2022-07-22 10:30:17,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:17,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-22 10:30:17,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:18,057 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 10:30:18,057 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 10:30:18,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356004376] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:18,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:18,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2022-07-22 10:30:18,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160620856] [2022-07-22 10:30:18,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:18,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 10:30:18,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:18,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 10:30:18,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2022-07-22 10:30:18,117 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 10:30:18,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:18,245 INFO L93 Difference]: Finished difference Result 89 states and 94 transitions. [2022-07-22 10:30:18,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-07-22 10:30:18,245 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) Word has length 55 [2022-07-22 10:30:18,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:18,246 INFO L225 Difference]: With dead ends: 89 [2022-07-22 10:30:18,246 INFO L226 Difference]: Without dead ends: 69 [2022-07-22 10:30:18,246 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2022-07-22 10:30:18,247 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 70 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:18,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 171 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:30:18,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-07-22 10:30:18,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 52. [2022-07-22 10:30:18,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 6 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-07-22 10:30:18,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2022-07-22 10:30:18,254 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 55 [2022-07-22 10:30:18,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:18,254 INFO L495 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2022-07-22 10:30:18,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 17 states have internal predecessors, (56), 5 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-07-22 10:30:18,254 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2022-07-22 10:30:18,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-22 10:30:18,255 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:18,255 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:18,277 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:18,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:18,456 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:18,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:18,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1754460089, now seen corresponding path program 7 times [2022-07-22 10:30:18,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:18,456 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361923436] [2022-07-22 10:30:18,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:18,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:18,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:18,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:18,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:18,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:18,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:18,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:18,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:18,716 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 12 proven. 48 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:30:18,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:18,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361923436] [2022-07-22 10:30:18,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361923436] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:18,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803501121] [2022-07-22 10:30:18,716 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:30:18,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:18,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:18,720 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) [2022-07-22 10:30:18,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-22 10:30:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:18,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 10:30:18,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:18,931 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 [2022-07-22 10:30:19,033 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:19,033 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:19,129 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 10:30:19,150 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-07-22 10:30:19,150 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:19,278 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803501121] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:19,278 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:30:19,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2022-07-22 10:30:19,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378076596] [2022-07-22 10:30:19,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:19,279 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:30:19,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:19,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:30:19,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=929, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 10:30:19,280 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 10:30:19,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:19,832 INFO L93 Difference]: Finished difference Result 84 states and 89 transitions. [2022-07-22 10:30:19,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 10:30:19,833 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) Word has length 59 [2022-07-22 10:30:19,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:19,833 INFO L225 Difference]: With dead ends: 84 [2022-07-22 10:30:19,833 INFO L226 Difference]: Without dead ends: 82 [2022-07-22 10:30:19,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=305, Invalid=2245, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 10:30:19,835 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 89 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 528 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 528 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:19,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 303 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 528 Invalid, 0 Unknown, 34 Unchecked, 0.3s Time] [2022-07-22 10:30:19,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-07-22 10:30:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 65. [2022-07-22 10:30:19,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 10:30:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 69 transitions. [2022-07-22 10:30:19,843 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 69 transitions. Word has length 59 [2022-07-22 10:30:19,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:19,843 INFO L495 AbstractCegarLoop]: Abstraction has 65 states and 69 transitions. [2022-07-22 10:30:19,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2857142857142856) internal successors, (64), 25 states have internal predecessors, (64), 10 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (11), 11 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 10:30:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 69 transitions. [2022-07-22 10:30:19,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 10:30:19,844 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:19,845 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:19,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:20,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-22 10:30:20,055 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:20,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:20,056 INFO L85 PathProgramCache]: Analyzing trace with hash 120574397, now seen corresponding path program 8 times [2022-07-22 10:30:20,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:20,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978112653] [2022-07-22 10:30:20,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:20,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:20,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:20,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:20,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:20,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:20,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:20,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:20,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:20,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:20,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:20,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:20,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:20,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:20,252 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 15 proven. 55 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:30:20,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:20,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978112653] [2022-07-22 10:30:20,253 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978112653] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:20,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268881899] [2022-07-22 10:30:20,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:30:20,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:20,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:20,256 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) [2022-07-22 10:30:20,281 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-22 10:30:20,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:30:20,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:20,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-22 10:30:20,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:20,491 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 [2022-07-22 10:30:20,792 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 10:30:20,792 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 25 treesize of output 12 [2022-07-22 10:30:20,822 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 30 proven. 40 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:30:20,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:21,165 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-07-22 10:30:21,168 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 42 treesize of output 36 [2022-07-22 10:30:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 27 proven. 43 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:30:21,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268881899] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:21,504 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:21,504 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2022-07-22 10:30:21,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143873567] [2022-07-22 10:30:21,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:21,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-22 10:30:21,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:21,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-22 10:30:21,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1669, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 10:30:21,508 INFO L87 Difference]: Start difference. First operand 65 states and 69 transitions. Second operand has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-22 10:30:22,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:22,253 INFO L93 Difference]: Finished difference Result 80 states and 84 transitions. [2022-07-22 10:30:22,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-22 10:30:22,253 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 63 [2022-07-22 10:30:22,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:22,254 INFO L225 Difference]: With dead ends: 80 [2022-07-22 10:30:22,254 INFO L226 Difference]: Without dead ends: 60 [2022-07-22 10:30:22,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=546, Invalid=3876, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 10:30:22,256 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 50 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 445 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 152 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:22,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 254 Invalid, 445 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 255 Invalid, 0 Unknown, 152 Unchecked, 0.1s Time] [2022-07-22 10:30:22,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-07-22 10:30:22,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-07-22 10:30:22,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 10:30:22,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-07-22 10:30:22,263 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 63 [2022-07-22 10:30:22,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:22,264 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-07-22 10:30:22,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.227272727272727) internal successors, (98), 39 states have internal predecessors, (98), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-22 10:30:22,264 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-07-22 10:30:22,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-22 10:30:22,265 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:22,265 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:22,286 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:22,479 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,SelfDestructingSolverStorable12 [2022-07-22 10:30:22,479 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:22,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:22,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1918482698, now seen corresponding path program 9 times [2022-07-22 10:30:22,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:22,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677988309] [2022-07-22 10:30:22,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:22,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:22,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:22,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:22,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:22,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:22,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:22,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:22,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:22,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:22,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:22,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:22,841 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 12 proven. 71 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 10:30:22,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:22,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677988309] [2022-07-22 10:30:22,843 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677988309] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:22,843 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822955689] [2022-07-22 10:30:22,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:30:22,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:22,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:22,844 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) [2022-07-22 10:30:22,846 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-22 10:30:22,922 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2022-07-22 10:30:22,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 35 conjunts are in the unsatisfiable core [2022-07-22 10:30:22,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:23,043 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 [2022-07-22 10:30:23,142 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:23,143 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:23,235 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:23,235 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:23,338 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 10:30:23,360 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 43 proven. 68 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-07-22 10:30:23,360 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:23,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1822955689] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:23,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:30:23,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 32 [2022-07-22 10:30:23,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006631676] [2022-07-22 10:30:23,492 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:23,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 10:30:23,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:23,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 10:30:23,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1114, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 10:30:23,494 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-22 10:30:24,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:24,052 INFO L93 Difference]: Finished difference Result 74 states and 77 transitions. [2022-07-22 10:30:24,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-07-22 10:30:24,052 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) Word has length 67 [2022-07-22 10:30:24,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:24,053 INFO L225 Difference]: With dead ends: 74 [2022-07-22 10:30:24,053 INFO L226 Difference]: Without dead ends: 72 [2022-07-22 10:30:24,054 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 77 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 971 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=333, Invalid=2529, Unknown=0, NotChecked=0, Total=2862 [2022-07-22 10:30:24,055 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 77 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 552 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 552 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 18 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:24,055 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 327 Invalid, 633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 552 Invalid, 0 Unknown, 18 Unchecked, 0.2s Time] [2022-07-22 10:30:24,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-07-22 10:30:24,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 64. [2022-07-22 10:30:24,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 7 states have call successors, (7), 5 states have call predecessors, (7), 5 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-07-22 10:30:24,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 67 transitions. [2022-07-22 10:30:24,063 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 67 transitions. Word has length 67 [2022-07-22 10:30:24,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:24,063 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 67 transitions. [2022-07-22 10:30:24,064 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.3333333333333335) internal successors, (70), 28 states have internal predecessors, (70), 12 states have call successors, (13), 2 states have call predecessors, (13), 3 states have return successors, (13), 13 states have call predecessors, (13), 12 states have call successors, (13) [2022-07-22 10:30:24,064 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 67 transitions. [2022-07-22 10:30:24,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-07-22 10:30:24,064 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:24,064 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:24,088 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:24,283 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,SelfDestructingSolverStorable13 [2022-07-22 10:30:24,283 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:24,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:24,284 INFO L85 PathProgramCache]: Analyzing trace with hash -700161792, now seen corresponding path program 10 times [2022-07-22 10:30:24,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:24,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530861149] [2022-07-22 10:30:24,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:24,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:24,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:24,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:24,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:24,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:24,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:24,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:24,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:24,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:24,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:24,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 15 proven. 78 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 10:30:24,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:24,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530861149] [2022-07-22 10:30:24,565 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530861149] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:24,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564307447] [2022-07-22 10:30:24,566 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:30:24,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:24,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:24,568 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) [2022-07-22 10:30:24,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-22 10:30:24,642 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:30:24,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 10:30:24,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:24,754 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 [2022-07-22 10:30:26,972 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:30:26,972 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:30:27,082 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:27,106 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 33 proven. 78 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-07-22 10:30:27,106 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:27,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564307447] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:27,198 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:30:27,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 25 [2022-07-22 10:30:27,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138784267] [2022-07-22 10:30:27,198 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:27,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-07-22 10:30:27,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:27,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-07-22 10:30:27,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=609, Unknown=1, NotChecked=0, Total=702 [2022-07-22 10:30:27,200 INFO L87 Difference]: Start difference. First operand 64 states and 67 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 10:30:27,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:27,592 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2022-07-22 10:30:27,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 10:30:27,592 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 71 [2022-07-22 10:30:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:27,593 INFO L225 Difference]: With dead ends: 98 [2022-07-22 10:30:27,593 INFO L226 Difference]: Without dead ends: 96 [2022-07-22 10:30:27,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 91 SyntacticMatches, 8 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 463 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=184, Invalid=1297, Unknown=1, NotChecked=0, Total=1482 [2022-07-22 10:30:27,595 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 42 mSDsluCounter, 269 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:27,595 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 295 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 433 Invalid, 0 Unknown, 72 Unchecked, 0.2s Time] [2022-07-22 10:30:27,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-22 10:30:27,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 77. [2022-07-22 10:30:27,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 10:30:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-07-22 10:30:27,605 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 71 [2022-07-22 10:30:27,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:27,606 INFO L495 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-07-22 10:30:27,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 22 states have internal predecessors, (60), 7 states have call successors, (8), 2 states have call predecessors, (8), 3 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2022-07-22 10:30:27,606 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-07-22 10:30:27,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 10:30:27,607 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:27,607 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 5, 5, 5, 5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:27,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:27,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 10:30:27,825 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:27,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1947082230, now seen corresponding path program 11 times [2022-07-22 10:30:27,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:27,826 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905386038] [2022-07-22 10:30:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:27,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:27,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:28,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:28,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:28,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:28,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:28,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:28,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:28,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:28,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:28,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:28,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:28,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:28,097 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 10:30:28,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:28,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905386038] [2022-07-22 10:30:28,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905386038] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:28,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770864474] [2022-07-22 10:30:28,098 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:30:28,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:28,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:28,100 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) [2022-07-22 10:30:28,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-22 10:30:28,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2022-07-22 10:30:28,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:28,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 10:30:28,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:28,332 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 [2022-07-22 10:30:28,463 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 18 proven. 89 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 10:30:28,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:28,549 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-07-22 10:30:28,551 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 32 treesize of output 28 [2022-07-22 10:30:28,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770864474] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:28,622 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:30:28,622 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 24 [2022-07-22 10:30:28,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451946148] [2022-07-22 10:30:28,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:28,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 10:30:28,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:28,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 10:30:28,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2022-07-22 10:30:28,625 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-22 10:30:29,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:29,318 INFO L93 Difference]: Finished difference Result 118 states and 123 transitions. [2022-07-22 10:30:29,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 10:30:29,319 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 75 [2022-07-22 10:30:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:29,320 INFO L225 Difference]: With dead ends: 118 [2022-07-22 10:30:29,320 INFO L226 Difference]: Without dead ends: 116 [2022-07-22 10:30:29,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 98 SyntacticMatches, 8 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=1995, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 10:30:29,321 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 93 mSDsluCounter, 408 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:29,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 440 Invalid, 843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-22 10:30:29,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-07-22 10:30:29,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 81. [2022-07-22 10:30:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 10:30:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-07-22 10:30:29,333 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 75 [2022-07-22 10:30:29,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:29,333 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-07-22 10:30:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 21 states have internal predecessors, (63), 6 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2022-07-22 10:30:29,334 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-07-22 10:30:29,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 10:30:29,334 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:29,334 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:29,356 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:29,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:29,547 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:29,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:29,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1497562435, now seen corresponding path program 12 times [2022-07-22 10:30:29,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:29,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266317483] [2022-07-22 10:30:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:29,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:29,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:29,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:29,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:29,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:29,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:29,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:29,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:29,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:29,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:29,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:29,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:29,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 105 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 10:30:29,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:29,806 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266317483] [2022-07-22 10:30:29,807 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266317483] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:29,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924841195] [2022-07-22 10:30:29,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:30:29,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:29,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:29,812 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) [2022-07-22 10:30:29,813 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-22 10:30:29,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2022-07-22 10:30:29,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:29,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 10:30:29,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:30,099 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 [2022-07-22 10:30:30,180 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:30,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:30,268 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:30,268 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:30,348 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:30,371 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 54 proven. 102 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-07-22 10:30:30,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:30,523 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:30,525 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 37 treesize of output 33 [2022-07-22 10:30:30,678 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 15 proven. 104 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2022-07-22 10:30:30,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924841195] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:30,678 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:30,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2022-07-22 10:30:30,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97388462] [2022-07-22 10:30:30,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:30,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 10:30:30,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:30,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 10:30:30,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=938, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 10:30:30,680 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-22 10:30:31,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:31,032 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-07-22 10:30:31,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-07-22 10:30:31,033 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) Word has length 79 [2022-07-22 10:30:31,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:31,034 INFO L225 Difference]: With dead ends: 100 [2022-07-22 10:30:31,034 INFO L226 Difference]: Without dead ends: 98 [2022-07-22 10:30:31,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 149 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=1611, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 10:30:31,035 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 45 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 603 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 603 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 31 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:31,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 315 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 603 Invalid, 0 Unknown, 31 Unchecked, 0.2s Time] [2022-07-22 10:30:31,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-07-22 10:30:31,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2022-07-22 10:30:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 66 states have internal predecessors, (69), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 10:30:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 85 transitions. [2022-07-22 10:30:31,047 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 85 transitions. Word has length 79 [2022-07-22 10:30:31,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:31,047 INFO L495 AbstractCegarLoop]: Abstraction has 81 states and 85 transitions. [2022-07-22 10:30:31,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.606060606060606) internal successors, (86), 29 states have internal predecessors, (86), 12 states have call successors, (14), 2 states have call predecessors, (14), 3 states have return successors, (15), 14 states have call predecessors, (15), 12 states have call successors, (15) [2022-07-22 10:30:31,047 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 85 transitions. [2022-07-22 10:30:31,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-07-22 10:30:31,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:31,048 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:31,067 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:31,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-07-22 10:30:31,256 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:31,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:31,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1814327276, now seen corresponding path program 13 times [2022-07-22 10:30:31,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:31,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533778908] [2022-07-22 10:30:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:31,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:31,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:31,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:31,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:31,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:31,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:31,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:31,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:31,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:31,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:31,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:31,382 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 33 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 10:30:31,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:31,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533778908] [2022-07-22 10:30:31,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533778908] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:31,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493922345] [2022-07-22 10:30:31,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:30:31,383 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:31,383 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:31,384 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) [2022-07-22 10:30:31,411 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-22 10:30:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:31,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-22 10:30:31,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:31,589 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 10:30:31,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 45 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-07-22 10:30:31,665 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493922345] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:31,665 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:31,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 23 [2022-07-22 10:30:31,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880509222] [2022-07-22 10:30:31,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:31,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-22 10:30:31,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:31,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-22 10:30:31,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=375, Unknown=0, NotChecked=0, Total=506 [2022-07-22 10:30:31,667 INFO L87 Difference]: Start difference. First operand 81 states and 85 transitions. Second operand has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-22 10:30:31,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:31,855 INFO L93 Difference]: Finished difference Result 121 states and 126 transitions. [2022-07-22 10:30:31,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-07-22 10:30:31,856 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 79 [2022-07-22 10:30:31,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:31,857 INFO L225 Difference]: With dead ends: 121 [2022-07-22 10:30:31,857 INFO L226 Difference]: Without dead ends: 93 [2022-07-22 10:30:31,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 163 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:30:31,858 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 72 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:31,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 232 Invalid, 231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:30:31,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-07-22 10:30:31,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 76. [2022-07-22 10:30:31,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 61 states have (on average 1.0327868852459017) internal successors, (63), 61 states have internal predecessors, (63), 8 states have call successors, (8), 6 states have call predecessors, (8), 6 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-07-22 10:30:31,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 79 transitions. [2022-07-22 10:30:31,868 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 79 transitions. Word has length 79 [2022-07-22 10:30:31,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:31,869 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 79 transitions. [2022-07-22 10:30:31,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.391304347826087) internal successors, (78), 23 states have internal predecessors, (78), 7 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-07-22 10:30:31,869 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 79 transitions. [2022-07-22 10:30:31,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-07-22 10:30:31,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:31,870 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:31,901 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:32,091 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,SelfDestructingSolverStorable17 [2022-07-22 10:30:32,091 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:32,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:32,092 INFO L85 PathProgramCache]: Analyzing trace with hash -502341447, now seen corresponding path program 14 times [2022-07-22 10:30:32,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:32,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423222022] [2022-07-22 10:30:32,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:32,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:32,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:32,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:32,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:32,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:32,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:32,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:32,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:32,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:32,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:32,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:32,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:32,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:32,411 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 10:30:32,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:32,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423222022] [2022-07-22 10:30:32,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423222022] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:32,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399639325] [2022-07-22 10:30:32,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:30:32,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:32,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:32,416 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) [2022-07-22 10:30:32,446 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-22 10:30:32,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:30:32,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:32,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 10:30:32,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:32,742 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 [2022-07-22 10:30:34,978 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:30:34,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:30:35,112 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:35,146 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 40 proven. 116 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2022-07-22 10:30:35,146 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:35,273 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:35,275 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 37 treesize of output 33 [2022-07-22 10:30:35,476 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 18 proven. 116 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 10:30:35,476 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399639325] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:35,476 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:35,476 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 38 [2022-07-22 10:30:35,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022933355] [2022-07-22 10:30:35,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:35,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 10:30:35,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:35,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 10:30:35,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1269, Unknown=1, NotChecked=0, Total=1406 [2022-07-22 10:30:35,478 INFO L87 Difference]: Start difference. First operand 76 states and 79 transitions. Second operand has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2022-07-22 10:30:36,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:36,035 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2022-07-22 10:30:36,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 10:30:36,036 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) Word has length 83 [2022-07-22 10:30:36,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:36,038 INFO L225 Difference]: With dead ends: 113 [2022-07-22 10:30:36,038 INFO L226 Difference]: Without dead ends: 111 [2022-07-22 10:30:36,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 156 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=257, Invalid=2394, Unknown=1, NotChecked=0, Total=2652 [2022-07-22 10:30:36,040 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 59 mSDsluCounter, 405 mSDsCounter, 0 mSdLazyCounter, 719 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 97 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:36,040 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 436 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 719 Invalid, 0 Unknown, 97 Unchecked, 0.3s Time] [2022-07-22 10:30:36,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-22 10:30:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 89. [2022-07-22 10:30:36,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 72 states have internal predecessors, (75), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 10:30:36,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2022-07-22 10:30:36,058 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 83 [2022-07-22 10:30:36,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:36,058 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2022-07-22 10:30:36,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 33 states have internal predecessors, (96), 14 states have call successors, (15), 2 states have call predecessors, (15), 3 states have return successors, (16), 16 states have call predecessors, (16), 14 states have call successors, (16) [2022-07-22 10:30:36,058 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2022-07-22 10:30:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 10:30:36,059 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:36,059 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:36,081 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:36,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:36,276 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:36,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:36,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1833952977, now seen corresponding path program 15 times [2022-07-22 10:30:36,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:36,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642156310] [2022-07-22 10:30:36,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:36,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:36,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:36,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:36,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:36,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:36,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:36,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:36,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:36,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:36,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:36,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:36,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:36,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:36,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:36,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:36,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:36,597 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 10:30:36,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642156310] [2022-07-22 10:30:36,598 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642156310] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:36,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796832063] [2022-07-22 10:30:36,598 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:30:36,598 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:36,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:36,600 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) [2022-07-22 10:30:36,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-22 10:30:36,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2022-07-22 10:30:36,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:36,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 10:30:36,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:36,986 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 [2022-07-22 10:30:37,389 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-22 10:30:37,390 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 21 treesize of output 10 [2022-07-22 10:30:37,412 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 21 proven. 131 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 10:30:37,412 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:37,712 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-07-22 10:30:37,714 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 32 treesize of output 28 [2022-07-22 10:30:37,795 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796832063] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:37,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:30:37,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2022-07-22 10:30:37,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497939563] [2022-07-22 10:30:37,796 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:37,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 10:30:37,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:37,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 10:30:37,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=2162, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 10:30:37,797 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-22 10:30:38,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:38,231 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-07-22 10:30:38,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-07-22 10:30:38,232 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) Word has length 87 [2022-07-22 10:30:38,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:38,233 INFO L225 Difference]: With dead ends: 112 [2022-07-22 10:30:38,233 INFO L226 Difference]: Without dead ends: 110 [2022-07-22 10:30:38,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=374, Invalid=2706, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 10:30:38,234 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 41 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 533 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:38,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 533 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 679 Invalid, 0 Unknown, 85 Unchecked, 0.3s Time] [2022-07-22 10:30:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-07-22 10:30:38,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2022-07-22 10:30:38,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 10:30:38,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-22 10:30:38,250 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 87 [2022-07-22 10:30:38,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:38,250 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-22 10:30:38,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.526315789473684) internal successors, (96), 35 states have internal predecessors, (96), 13 states have call successors, (14), 1 states have call predecessors, (14), 2 states have return successors, (15), 15 states have call predecessors, (15), 13 states have call successors, (15) [2022-07-22 10:30:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-22 10:30:38,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 10:30:38,251 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:38,252 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:38,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:38,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:38,467 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:38,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:38,468 INFO L85 PathProgramCache]: Analyzing trace with hash 474886268, now seen corresponding path program 16 times [2022-07-22 10:30:38,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:38,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109638222] [2022-07-22 10:30:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:38,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:38,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:38,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:38,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:38,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:38,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:38,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:38,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:38,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:38,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:38,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:38,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:38,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:38,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:38,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:38,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:30:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:38,773 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 147 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 10:30:38,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:38,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109638222] [2022-07-22 10:30:38,773 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109638222] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:38,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648123024] [2022-07-22 10:30:38,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:30:38,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:38,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:38,775 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) [2022-07-22 10:30:38,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-07-22 10:30:38,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:30:38,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:38,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 43 conjunts are in the unsatisfiable core [2022-07-22 10:30:38,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:39,122 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 [2022-07-22 10:30:39,205 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:39,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:39,289 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:39,290 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:39,407 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:39,431 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 65 proven. 144 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-07-22 10:30:39,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:39,596 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:39,599 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 37 treesize of output 33 [2022-07-22 10:30:39,776 INFO L134 CoverageAnalysis]: Checked inductivity of 267 backedges. 18 proven. 146 refuted. 0 times theorem prover too weak. 103 trivial. 0 not checked. [2022-07-22 10:30:39,776 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648123024] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:39,776 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:39,776 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2022-07-22 10:30:39,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310930212] [2022-07-22 10:30:39,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:39,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-22 10:30:39,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:39,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-22 10:30:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1198, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 10:30:39,778 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-22 10:30:40,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:40,409 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-07-22 10:30:40,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-07-22 10:30:40,409 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) Word has length 91 [2022-07-22 10:30:40,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:40,410 INFO L225 Difference]: With dead ends: 121 [2022-07-22 10:30:40,410 INFO L226 Difference]: Without dead ends: 119 [2022-07-22 10:30:40,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 173 SyntacticMatches, 13 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=2298, Unknown=0, NotChecked=0, Total=2550 [2022-07-22 10:30:40,412 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 71 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 1182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 30 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:40,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 629 Invalid, 1182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 1101 Invalid, 0 Unknown, 30 Unchecked, 0.4s Time] [2022-07-22 10:30:40,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-07-22 10:30:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2022-07-22 10:30:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 76 states have internal predecessors, (79), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 10:30:40,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2022-07-22 10:30:40,427 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 91 [2022-07-22 10:30:40,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:40,427 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2022-07-22 10:30:40,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7027027027027026) internal successors, (100), 33 states have internal predecessors, (100), 14 states have call successors, (16), 2 states have call predecessors, (16), 3 states have return successors, (17), 16 states have call predecessors, (17), 14 states have call successors, (17) [2022-07-22 10:30:40,427 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2022-07-22 10:30:40,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-07-22 10:30:40,428 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:40,428 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:40,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:40,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:40,629 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:40,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:40,629 INFO L85 PathProgramCache]: Analyzing trace with hash 645146277, now seen corresponding path program 17 times [2022-07-22 10:30:40,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:40,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737489704] [2022-07-22 10:30:40,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:40,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:40,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:40,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:40,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:40,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:40,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:40,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:40,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:40,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:40,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:40,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:40,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:40,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 51 proven. 87 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 10:30:40,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:40,774 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737489704] [2022-07-22 10:30:40,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737489704] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:40,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439493936] [2022-07-22 10:30:40,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:30:40,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:40,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:40,777 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) [2022-07-22 10:30:40,802 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-07-22 10:30:40,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2022-07-22 10:30:40,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:40,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 16 conjunts are in the unsatisfiable core [2022-07-22 10:30:40,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 10:30:41,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:41,187 INFO L134 CoverageAnalysis]: Checked inductivity of 250 backedges. 72 proven. 66 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-07-22 10:30:41,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439493936] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:41,188 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:41,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 26 [2022-07-22 10:30:41,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934364795] [2022-07-22 10:30:41,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:41,188 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 10:30:41,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:41,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 10:30:41,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=485, Unknown=0, NotChecked=0, Total=650 [2022-07-22 10:30:41,189 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-22 10:30:41,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:41,400 INFO L93 Difference]: Finished difference Result 137 states and 142 transitions. [2022-07-22 10:30:41,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-22 10:30:41,401 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) Word has length 91 [2022-07-22 10:30:41,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:41,402 INFO L225 Difference]: With dead ends: 137 [2022-07-22 10:30:41,402 INFO L226 Difference]: Without dead ends: 105 [2022-07-22 10:30:41,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 188 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 10:30:41,403 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 125 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:41,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [126 Valid, 183 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:30:41,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-07-22 10:30:41,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2022-07-22 10:30:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 9 states have call successors, (9), 7 states have call predecessors, (9), 7 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-07-22 10:30:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 91 transitions. [2022-07-22 10:30:41,422 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 91 transitions. Word has length 91 [2022-07-22 10:30:41,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:41,423 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 91 transitions. [2022-07-22 10:30:41,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 8 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 8 states have call predecessors, (9), 8 states have call successors, (9) [2022-07-22 10:30:41,423 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 91 transitions. [2022-07-22 10:30:41,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-07-22 10:30:41,425 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:41,425 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:41,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:41,650 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,SelfDestructingSolverStorable21 [2022-07-22 10:30:41,650 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:41,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:41,650 INFO L85 PathProgramCache]: Analyzing trace with hash -110375054, now seen corresponding path program 18 times [2022-07-22 10:30:41,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:41,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382158960] [2022-07-22 10:30:41,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:41,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:41,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:41,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:41,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:41,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:41,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:41,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:41,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:41,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:41,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:41,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:41,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:41,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:41,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:30:41,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:41,978 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 10:30:41,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:41,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382158960] [2022-07-22 10:30:41,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382158960] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:41,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824127506] [2022-07-22 10:30:41,979 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:30:41,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:41,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:41,982 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) [2022-07-22 10:30:41,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-07-22 10:30:42,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2022-07-22 10:30:42,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:42,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 44 conjunts are in the unsatisfiable core [2022-07-22 10:30:42,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:42,376 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 [2022-07-22 10:30:42,558 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:30:42,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:30:42,739 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:42,765 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 47 proven. 162 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2022-07-22 10:30:42,765 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:42,888 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:42,891 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 37 treesize of output 33 [2022-07-22 10:30:43,112 INFO L134 CoverageAnalysis]: Checked inductivity of 285 backedges. 21 proven. 162 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 10:30:43,112 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824127506] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:43,112 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:43,113 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 42 [2022-07-22 10:30:43,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356098977] [2022-07-22 10:30:43,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:43,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 10:30:43,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:43,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 10:30:43,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1570, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 10:30:43,114 INFO L87 Difference]: Start difference. First operand 88 states and 91 transitions. Second operand has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-22 10:30:43,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:43,737 INFO L93 Difference]: Finished difference Result 129 states and 133 transitions. [2022-07-22 10:30:43,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-07-22 10:30:43,738 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) Word has length 95 [2022-07-22 10:30:43,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:43,739 INFO L225 Difference]: With dead ends: 129 [2022-07-22 10:30:43,739 INFO L226 Difference]: Without dead ends: 127 [2022-07-22 10:30:43,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 180 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=281, Invalid=2911, Unknown=0, NotChecked=0, Total=3192 [2022-07-22 10:30:43,740 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 82 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 1125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:43,740 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 543 Invalid, 1125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 994 Invalid, 0 Unknown, 68 Unchecked, 0.4s Time] [2022-07-22 10:30:43,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-22 10:30:43,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 101. [2022-07-22 10:30:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 82 states have internal predecessors, (85), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 10:30:43,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2022-07-22 10:30:43,758 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 95 [2022-07-22 10:30:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:43,759 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2022-07-22 10:30:43,759 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.682926829268293) internal successors, (110), 37 states have internal predecessors, (110), 16 states have call successors, (17), 2 states have call predecessors, (17), 3 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-22 10:30:43,759 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2022-07-22 10:30:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-07-22 10:30:43,760 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:43,760 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 7, 7, 7, 7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:43,780 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2022-07-22 10:30:43,967 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,SelfDestructingSolverStorable22 [2022-07-22 10:30:43,967 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:43,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:43,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1072364696, now seen corresponding path program 19 times [2022-07-22 10:30:43,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:43,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22595094] [2022-07-22 10:30:43,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:43,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:43,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:44,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:44,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:44,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:44,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:44,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:44,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:30:44,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,341 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 10:30:44,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:44,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22595094] [2022-07-22 10:30:44,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22595094] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:44,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576469431] [2022-07-22 10:30:44,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:30:44,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:44,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:44,344 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) [2022-07-22 10:30:44,346 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-07-22 10:30:44,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 45 conjunts are in the unsatisfiable core [2022-07-22 10:30:44,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:44,762 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 [2022-07-22 10:30:44,956 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:44,982 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 10:30:44,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:45,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-07-22 10:30:45,062 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 32 treesize of output 28 [2022-07-22 10:30:45,280 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 24 proven. 181 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 10:30:45,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576469431] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:45,280 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:45,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 22, 22] total 42 [2022-07-22 10:30:45,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284644304] [2022-07-22 10:30:45,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:45,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-07-22 10:30:45,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:45,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-07-22 10:30:45,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1585, Unknown=0, NotChecked=0, Total=1722 [2022-07-22 10:30:45,282 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-22 10:30:46,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:46,278 INFO L93 Difference]: Finished difference Result 150 states and 155 transitions. [2022-07-22 10:30:46,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-07-22 10:30:46,279 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) Word has length 99 [2022-07-22 10:30:46,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:46,280 INFO L225 Difference]: With dead ends: 150 [2022-07-22 10:30:46,280 INFO L226 Difference]: Without dead ends: 148 [2022-07-22 10:30:46,281 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 192 SyntacticMatches, 6 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=424, Invalid=4268, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 10:30:46,282 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 219 mSDsluCounter, 619 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 69 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:46,282 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 657 Invalid, 1522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1278 Invalid, 0 Unknown, 69 Unchecked, 0.5s Time] [2022-07-22 10:30:46,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-07-22 10:30:46,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2022-07-22 10:30:46,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 10:30:46,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-07-22 10:30:46,301 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 99 [2022-07-22 10:30:46,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:46,301 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-07-22 10:30:46,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.8048780487804876) internal successors, (115), 37 states have internal predecessors, (115), 16 states have call successors, (17), 1 states have call predecessors, (17), 2 states have return successors, (18), 18 states have call predecessors, (18), 16 states have call successors, (18) [2022-07-22 10:30:46,302 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-07-22 10:30:46,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 10:30:46,303 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:46,303 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:46,322 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2022-07-22 10:30:46,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:46,511 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:46,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:46,512 INFO L85 PathProgramCache]: Analyzing trace with hash -369454411, now seen corresponding path program 20 times [2022-07-22 10:30:46,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:46,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987348984] [2022-07-22 10:30:46,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:46,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:46,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:46,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:46,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:30:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:30:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:46,858 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 197 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 10:30:46,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:46,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987348984] [2022-07-22 10:30:46,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987348984] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:46,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196055091] [2022-07-22 10:30:46,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:30:46,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:46,859 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:46,864 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) [2022-07-22 10:30:46,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-07-22 10:30:46,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:30:46,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:46,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 47 conjunts are in the unsatisfiable core [2022-07-22 10:30:46,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:47,234 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 [2022-07-22 10:30:47,317 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:47,317 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:47,416 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:47,418 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:47,571 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 76 proven. 194 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-07-22 10:30:47,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:47,755 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:47,757 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 37 treesize of output 33 [2022-07-22 10:30:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 21 proven. 196 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2022-07-22 10:30:47,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196055091] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:47,920 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:47,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2022-07-22 10:30:47,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44314026] [2022-07-22 10:30:47,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:47,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 10:30:47,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:47,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 10:30:47,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 10:30:47,922 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-22 10:30:48,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:48,557 INFO L93 Difference]: Finished difference Result 137 states and 141 transitions. [2022-07-22 10:30:48,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 10:30:48,557 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) Word has length 103 [2022-07-22 10:30:48,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:48,558 INFO L225 Difference]: With dead ends: 137 [2022-07-22 10:30:48,558 INFO L226 Difference]: Without dead ends: 135 [2022-07-22 10:30:48,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 197 SyntacticMatches, 13 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1018 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=276, Invalid=2804, Unknown=0, NotChecked=0, Total=3080 [2022-07-22 10:30:48,559 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 92 mSDsluCounter, 456 mSDsCounter, 0 mSdLazyCounter, 1125 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 492 SdHoareTripleChecker+Invalid, 1230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 1125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:48,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 492 Invalid, 1230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 1125 Invalid, 0 Unknown, 34 Unchecked, 0.4s Time] [2022-07-22 10:30:48,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-07-22 10:30:48,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 105. [2022-07-22 10:30:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 86 states have internal predecessors, (89), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 10:30:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-07-22 10:30:48,576 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 103 [2022-07-22 10:30:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:48,576 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-07-22 10:30:48,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.7804878048780486) internal successors, (114), 37 states have internal predecessors, (114), 16 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (19), 18 states have call predecessors, (19), 16 states have call successors, (19) [2022-07-22 10:30:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-07-22 10:30:48,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-07-22 10:30:48,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:48,577 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:48,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2022-07-22 10:30:48,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:48,783 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:48,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:48,784 INFO L85 PathProgramCache]: Analyzing trace with hash -428389282, now seen corresponding path program 21 times [2022-07-22 10:30:48,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:48,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314898943] [2022-07-22 10:30:48,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:48,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:48,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:48,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:48,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:48,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:48,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:48,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:48,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:48,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:48,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:48,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:48,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:48,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:30:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 73 proven. 116 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 10:30:48,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:48,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314898943] [2022-07-22 10:30:48,951 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314898943] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:48,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411171392] [2022-07-22 10:30:48,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:30:48,951 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:48,952 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:48,953 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) [2022-07-22 10:30:48,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-07-22 10:30:49,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 10:30:49,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:49,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 291 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 10:30:49,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:49,383 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 10:30:49,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:49,470 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 98 proven. 91 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-07-22 10:30:49,470 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411171392] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:49,470 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:49,470 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 29 [2022-07-22 10:30:49,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89157490] [2022-07-22 10:30:49,471 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:49,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 10:30:49,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:49,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 10:30:49,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=609, Unknown=0, NotChecked=0, Total=812 [2022-07-22 10:30:49,472 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-22 10:30:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:49,654 INFO L93 Difference]: Finished difference Result 153 states and 158 transitions. [2022-07-22 10:30:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-07-22 10:30:49,655 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) Word has length 103 [2022-07-22 10:30:49,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:49,655 INFO L225 Difference]: With dead ends: 153 [2022-07-22 10:30:49,655 INFO L226 Difference]: Without dead ends: 117 [2022-07-22 10:30:49,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 213 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=997, Unknown=0, NotChecked=0, Total=1332 [2022-07-22 10:30:49,657 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 118 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:49,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [119 Valid, 219 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 10:30:49,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-07-22 10:30:49,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 100. [2022-07-22 10:30:49,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 81 states have (on average 1.0246913580246915) internal successors, (83), 81 states have internal predecessors, (83), 10 states have call successors, (10), 8 states have call predecessors, (10), 8 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-07-22 10:30:49,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-07-22 10:30:49,675 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 103 [2022-07-22 10:30:49,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:49,675 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-07-22 10:30:49,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.4482758620689653) internal successors, (100), 29 states have internal predecessors, (100), 9 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 9 states have call predecessors, (10), 9 states have call successors, (10) [2022-07-22 10:30:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-07-22 10:30:49,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-07-22 10:30:49,676 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:49,676 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:49,700 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2022-07-22 10:30:49,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2022-07-22 10:30:49,891 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:49,892 INFO L85 PathProgramCache]: Analyzing trace with hash 2033872171, now seen corresponding path program 22 times [2022-07-22 10:30:49,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:49,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518179829] [2022-07-22 10:30:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:49,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:49,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:50,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:50,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:50,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:50,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:30:50,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:30:50,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:50,248 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 10:30:50,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:50,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518179829] [2022-07-22 10:30:50,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518179829] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:50,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037676814] [2022-07-22 10:30:50,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:30:50,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:50,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:50,252 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) [2022-07-22 10:30:50,278 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-07-22 10:30:50,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:30:50,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:50,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 48 conjunts are in the unsatisfiable core [2022-07-22 10:30:50,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:50,706 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 [2022-07-22 10:30:50,862 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:30:50,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:30:51,069 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 54 proven. 216 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 10:30:51,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:51,225 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:51,227 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 37 treesize of output 33 [2022-07-22 10:30:51,452 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 24 proven. 216 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 10:30:51,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037676814] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:51,453 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:51,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 46 [2022-07-22 10:30:51,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411114675] [2022-07-22 10:30:51,453 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:51,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-07-22 10:30:51,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:51,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-07-22 10:30:51,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1902, Unknown=0, NotChecked=0, Total=2070 [2022-07-22 10:30:51,454 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2022-07-22 10:30:52,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:52,153 INFO L93 Difference]: Finished difference Result 140 states and 144 transitions. [2022-07-22 10:30:52,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 10:30:52,153 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) Word has length 107 [2022-07-22 10:30:52,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:52,156 INFO L225 Difference]: With dead ends: 140 [2022-07-22 10:30:52,156 INFO L226 Difference]: Without dead ends: 138 [2022-07-22 10:30:52,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 207 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=3146, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 10:30:52,156 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 61 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 1449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:52,157 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 737 Invalid, 1449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1335 Invalid, 0 Unknown, 68 Unchecked, 0.5s Time] [2022-07-22 10:30:52,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-07-22 10:30:52,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2022-07-22 10:30:52,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 92 states have internal predecessors, (95), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 10:30:52,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2022-07-22 10:30:52,175 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 107 [2022-07-22 10:30:52,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:52,176 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2022-07-22 10:30:52,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.7555555555555555) internal successors, (124), 41 states have internal predecessors, (124), 18 states have call successors, (19), 2 states have call predecessors, (19), 3 states have return successors, (20), 20 states have call predecessors, (20), 18 states have call successors, (20) [2022-07-22 10:30:52,176 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2022-07-22 10:30:52,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-07-22 10:30:52,177 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:52,177 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 8, 8, 8, 8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:52,198 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2022-07-22 10:30:52,391 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,SelfDestructingSolverStorable26 [2022-07-22 10:30:52,392 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:52,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:52,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1467751585, now seen corresponding path program 23 times [2022-07-22 10:30:52,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:52,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463064717] [2022-07-22 10:30:52,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:52,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:52,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:52,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:52,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:52,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:30:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:30:52,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:52,750 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 10:30:52,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:52,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463064717] [2022-07-22 10:30:52,751 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463064717] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:52,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59076582] [2022-07-22 10:30:52,751 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:30:52,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:52,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:52,756 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) [2022-07-22 10:30:52,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-07-22 10:30:52,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-07-22 10:30:52,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:52,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 49 conjunts are in the unsatisfiable core [2022-07-22 10:30:52,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:53,273 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 [2022-07-22 10:30:53,493 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:53,519 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 10:30:53,519 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:53,603 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-07-22 10:30:53,605 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 32 treesize of output 28 [2022-07-22 10:30:53,782 INFO L134 CoverageAnalysis]: Checked inductivity of 398 backedges. 27 proven. 239 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 10:30:53,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59076582] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:53,782 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:53,782 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 44 [2022-07-22 10:30:53,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248351533] [2022-07-22 10:30:53,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:53,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-22 10:30:53,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:53,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-22 10:30:53,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2022-07-22 10:30:53,784 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-22 10:30:55,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:55,027 INFO L93 Difference]: Finished difference Result 166 states and 171 transitions. [2022-07-22 10:30:55,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-22 10:30:55,028 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) Word has length 111 [2022-07-22 10:30:55,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:55,028 INFO L225 Difference]: With dead ends: 166 [2022-07-22 10:30:55,028 INFO L226 Difference]: Without dead ends: 164 [2022-07-22 10:30:55,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 217 SyntacticMatches, 6 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1384 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=457, Invalid=4945, Unknown=0, NotChecked=0, Total=5402 [2022-07-22 10:30:55,029 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 236 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1782 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 1782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:55,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 839 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 1782 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 10:30:55,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-07-22 10:30:55,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 117. [2022-07-22 10:30:55,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 10:30:55,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-07-22 10:30:55,046 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 111 [2022-07-22 10:30:55,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:55,046 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-07-22 10:30:55,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 40 states have internal predecessors, (128), 17 states have call successors, (18), 1 states have call predecessors, (18), 2 states have return successors, (19), 19 states have call predecessors, (19), 17 states have call successors, (19) [2022-07-22 10:30:55,047 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-07-22 10:30:55,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-22 10:30:55,048 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:55,048 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:55,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:55,258 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,SelfDestructingSolverStorable27 [2022-07-22 10:30:55,258 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:55,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:55,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1057448942, now seen corresponding path program 24 times [2022-07-22 10:30:55,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:55,259 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833583217] [2022-07-22 10:30:55,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:55,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:55,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:55,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:55,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:55,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:55,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:55,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:55,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:30:55,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:30:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:30:55,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:55,589 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 255 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 10:30:55,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:55,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833583217] [2022-07-22 10:30:55,589 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833583217] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:55,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105332363] [2022-07-22 10:30:55,590 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:30:55,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:55,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:55,592 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) [2022-07-22 10:30:55,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2022-07-22 10:30:55,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-07-22 10:30:55,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-22 10:30:55,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:56,124 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 [2022-07-22 10:30:56,202 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:56,202 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:56,290 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:30:56,291 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:30:56,472 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:30:56,499 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 87 proven. 252 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2022-07-22 10:30:56,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:56,668 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:30:56,671 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 37 treesize of output 33 [2022-07-22 10:30:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 24 proven. 254 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2022-07-22 10:30:56,839 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105332363] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:56,839 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:56,839 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2022-07-22 10:30:56,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641374909] [2022-07-22 10:30:56,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:56,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-07-22 10:30:56,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:56,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-07-22 10:30:56,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1814, Unknown=0, NotChecked=0, Total=1980 [2022-07-22 10:30:56,841 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2022-07-22 10:30:57,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:57,586 INFO L93 Difference]: Finished difference Result 153 states and 157 transitions. [2022-07-22 10:30:57,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-07-22 10:30:57,587 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) Word has length 115 [2022-07-22 10:30:57,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:57,587 INFO L225 Difference]: With dead ends: 153 [2022-07-22 10:30:57,587 INFO L226 Difference]: Without dead ends: 151 [2022-07-22 10:30:57,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 220 SyntacticMatches, 13 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=300, Invalid=3360, Unknown=0, NotChecked=0, Total=3660 [2022-07-22 10:30:57,588 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 98 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1323 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 1323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 34 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:57,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 660 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 1323 Invalid, 0 Unknown, 34 Unchecked, 0.5s Time] [2022-07-22 10:30:57,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-07-22 10:30:57,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 117. [2022-07-22 10:30:57,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 96 states have (on average 1.03125) internal successors, (99), 96 states have internal predecessors, (99), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 10:30:57,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2022-07-22 10:30:57,612 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 115 [2022-07-22 10:30:57,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:57,612 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2022-07-22 10:30:57,612 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.8444444444444446) internal successors, (128), 41 states have internal predecessors, (128), 18 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 20 states have call predecessors, (21), 18 states have call successors, (21) [2022-07-22 10:30:57,613 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2022-07-22 10:30:57,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-07-22 10:30:57,613 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:57,614 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:57,634 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2022-07-22 10:30:57,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2022-07-22 10:30:57,828 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:57,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:57,828 INFO L85 PathProgramCache]: Analyzing trace with hash -707976937, now seen corresponding path program 25 times [2022-07-22 10:30:57,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:57,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012688875] [2022-07-22 10:30:57,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:57,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:57,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:58,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:58,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:58,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:58,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:58,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:58,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:58,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:30:58,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:30:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 99 proven. 149 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-22 10:30:58,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:58,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012688875] [2022-07-22 10:30:58,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012688875] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:58,020 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796723034] [2022-07-22 10:30:58,020 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:30:58,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:58,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:58,024 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) [2022-07-22 10:30:58,025 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2022-07-22 10:30:58,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:58,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2022-07-22 10:30:58,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:58,363 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-22 10:30:58,363 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:30:58,459 INFO L134 CoverageAnalysis]: Checked inductivity of 428 backedges. 128 proven. 120 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-07-22 10:30:58,460 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796723034] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:30:58,460 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:30:58,460 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 32 [2022-07-22 10:30:58,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553271734] [2022-07-22 10:30:58,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:30:58,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-07-22 10:30:58,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:30:58,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-07-22 10:30:58,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=747, Unknown=0, NotChecked=0, Total=992 [2022-07-22 10:30:58,462 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 10:30:58,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:30:58,717 INFO L93 Difference]: Finished difference Result 169 states and 174 transitions. [2022-07-22 10:30:58,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 10:30:58,718 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) Word has length 115 [2022-07-22 10:30:58,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:30:58,718 INFO L225 Difference]: With dead ends: 169 [2022-07-22 10:30:58,718 INFO L226 Difference]: Without dead ends: 129 [2022-07-22 10:30:58,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 238 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=407, Invalid=1233, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 10:30:58,719 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 141 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:30:58,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [142 Valid, 235 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:30:58,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-07-22 10:30:58,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2022-07-22 10:30:58,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 11 states have call successors, (11), 9 states have call predecessors, (11), 9 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-07-22 10:30:58,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2022-07-22 10:30:58,738 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 115 [2022-07-22 10:30:58,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:30:58,738 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2022-07-22 10:30:58,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.46875) internal successors, (111), 32 states have internal predecessors, (111), 10 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 10 states have call predecessors, (11), 10 states have call successors, (11) [2022-07-22 10:30:58,738 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2022-07-22 10:30:58,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-07-22 10:30:58,739 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:30:58,739 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:30:58,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2022-07-22 10:30:58,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:58,944 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:30:58,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:30:58,945 INFO L85 PathProgramCache]: Analyzing trace with hash -325453340, now seen corresponding path program 26 times [2022-07-22 10:30:58,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:30:58,945 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270463455] [2022-07-22 10:30:58,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:30:58,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:30:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:30:59,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:30:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:30:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:30:59,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:30:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:30:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:30:59,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:30:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:30:59,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:30:59,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:30:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:30:59,357 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 10:30:59,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:30:59,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270463455] [2022-07-22 10:30:59,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270463455] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:30:59,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051438335] [2022-07-22 10:30:59,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:30:59,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:30:59,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:30:59,360 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) [2022-07-22 10:30:59,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2022-07-22 10:30:59,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:30:59,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:30:59,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 331 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 10:30:59,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:30:59,823 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 [2022-07-22 10:31:01,972 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:31:01,973 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:31:02,204 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:31:02,231 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 61 proven. 278 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-07-22 10:31:02,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:02,361 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:31:02,362 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 37 treesize of output 33 [2022-07-22 10:31:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 27 proven. 278 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 10:31:02,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051438335] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:31:02,552 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:31:02,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 48 [2022-07-22 10:31:02,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658210466] [2022-07-22 10:31:02,552 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:02,553 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 10:31:02,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:02,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 10:31:02,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=2080, Unknown=1, NotChecked=0, Total=2256 [2022-07-22 10:31:02,554 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-07-22 10:31:03,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:31:03,455 INFO L93 Difference]: Finished difference Result 161 states and 165 transitions. [2022-07-22 10:31:03,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 10:31:03,455 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) Word has length 119 [2022-07-22 10:31:03,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:31:03,456 INFO L225 Difference]: With dead ends: 161 [2022-07-22 10:31:03,456 INFO L226 Difference]: Without dead ends: 159 [2022-07-22 10:31:03,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 229 SyntacticMatches, 9 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1256 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=318, Invalid=3841, Unknown=1, NotChecked=0, Total=4160 [2022-07-22 10:31:03,457 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 64 mSDsluCounter, 1084 mSDsCounter, 0 mSdLazyCounter, 1846 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1846 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 10:31:03,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1124 Invalid, 2008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1846 Invalid, 0 Unknown, 113 Unchecked, 0.7s Time] [2022-07-22 10:31:03,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-07-22 10:31:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 125. [2022-07-22 10:31:03,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 102 states have (on average 1.0294117647058822) internal successors, (105), 102 states have internal predecessors, (105), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-22 10:31:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2022-07-22 10:31:03,483 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 119 [2022-07-22 10:31:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:31:03,483 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2022-07-22 10:31:03,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.8541666666666665) internal successors, (137), 44 states have internal predecessors, (137), 19 states have call successors, (20), 2 states have call predecessors, (20), 3 states have return successors, (21), 21 states have call predecessors, (21), 19 states have call successors, (21) [2022-07-22 10:31:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2022-07-22 10:31:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-07-22 10:31:03,484 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:31:03,484 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 9, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:31:03,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2022-07-22 10:31:03,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:03,698 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:31:03,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:31:03,699 INFO L85 PathProgramCache]: Analyzing trace with hash -1033591590, now seen corresponding path program 27 times [2022-07-22 10:31:03,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:31:03,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204144564] [2022-07-22 10:31:03,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:31:03,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:31:03,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:31:04,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:31:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:31:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:31:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:31:04,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:31:04,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:31:04,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:31:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:31:04,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:31:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:31:04,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:04,132 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 30 proven. 305 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 10:31:04,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:31:04,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204144564] [2022-07-22 10:31:04,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204144564] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:04,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622717055] [2022-07-22 10:31:04,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:31:04,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:04,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:31:04,136 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) [2022-07-22 10:31:04,161 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2022-07-22 10:31:04,450 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2022-07-22 10:31:04,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:31:04,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-22 10:31:04,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:31:04,843 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 [2022-07-22 10:31:05,414 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 10:31:05,414 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 25 treesize of output 12 [2022-07-22 10:31:05,445 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 150 proven. 185 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 10:31:05,445 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:06,120 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-07-22 10:31:06,123 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 42 treesize of output 36 [2022-07-22 10:31:06,697 INFO L134 CoverageAnalysis]: Checked inductivity of 501 backedges. 142 proven. 193 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 10:31:06,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622717055] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:31:06,697 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:31:06,697 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 75 [2022-07-22 10:31:06,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9896646] [2022-07-22 10:31:06,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:06,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-07-22 10:31:06,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:06,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-07-22 10:31:06,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=4969, Unknown=0, NotChecked=0, Total=5550 [2022-07-22 10:31:06,699 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-07-22 10:31:08,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:31:08,639 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-07-22 10:31:08,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-07-22 10:31:08,640 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) Word has length 123 [2022-07-22 10:31:08,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:31:08,641 INFO L225 Difference]: With dead ends: 160 [2022-07-22 10:31:08,641 INFO L226 Difference]: Without dead ends: 120 [2022-07-22 10:31:08,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 237 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4055 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1517, Invalid=13489, Unknown=0, NotChecked=0, Total=15006 [2022-07-22 10:31:08,642 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 81 mSDsluCounter, 580 mSDsCounter, 0 mSdLazyCounter, 779 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 241 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:31:08,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 616 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 779 Invalid, 0 Unknown, 241 Unchecked, 0.3s Time] [2022-07-22 10:31:08,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-07-22 10:31:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-07-22 10:31:08,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 97 states have (on average 1.0206185567010309) internal successors, (99), 97 states have internal predecessors, (99), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-22 10:31:08,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-07-22 10:31:08,661 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 123 [2022-07-22 10:31:08,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:31:08,661 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-07-22 10:31:08,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 2.7432432432432434) internal successors, (203), 70 states have internal predecessors, (203), 28 states have call successors, (29), 1 states have call predecessors, (29), 2 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2022-07-22 10:31:08,662 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-07-22 10:31:08,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-07-22 10:31:08,662 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:31:08,662 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:31:08,679 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2022-07-22 10:31:08,862 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,SelfDestructingSolverStorable31 [2022-07-22 10:31:08,863 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:31:08,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:31:08,863 INFO L85 PathProgramCache]: Analyzing trace with hash -160177113, now seen corresponding path program 28 times [2022-07-22 10:31:08,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:31:08,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527379389] [2022-07-22 10:31:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:31:08,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:31:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:31:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:31:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:31:09,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:31:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:31:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:31:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:31:09,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:31:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:31:09,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:31:09,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:31:09,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:31:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:09,220 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 27 proven. 321 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-22 10:31:09,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:31:09,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527379389] [2022-07-22 10:31:09,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527379389] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:09,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227053329] [2022-07-22 10:31:09,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:31:09,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:09,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:31:09,224 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) [2022-07-22 10:31:09,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2022-07-22 10:31:09,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:31:09,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:31:09,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 351 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 10:31:09,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:31:09,699 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 [2022-07-22 10:31:09,776 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:31:09,777 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:31:09,868 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:31:09,869 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:31:10,089 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:31:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 98 proven. 318 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-07-22 10:31:10,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:10,309 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:31:10,311 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 37 treesize of output 33 [2022-07-22 10:31:10,493 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 27 proven. 320 refuted. 0 times theorem prover too weak. 205 trivial. 0 not checked. [2022-07-22 10:31:10,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227053329] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:31:10,493 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:31:10,493 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2022-07-22 10:31:10,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96834536] [2022-07-22 10:31:10,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:10,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-07-22 10:31:10,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:10,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-07-22 10:31:10,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=2170, Unknown=0, NotChecked=0, Total=2352 [2022-07-22 10:31:10,495 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2022-07-22 10:31:11,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:31:11,417 INFO L93 Difference]: Finished difference Result 134 states and 137 transitions. [2022-07-22 10:31:11,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-07-22 10:31:11,418 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) Word has length 127 [2022-07-22 10:31:11,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:31:11,418 INFO L225 Difference]: With dead ends: 134 [2022-07-22 10:31:11,418 INFO L226 Difference]: Without dead ends: 132 [2022-07-22 10:31:11,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 244 SyntacticMatches, 13 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1417 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=324, Invalid=3966, Unknown=0, NotChecked=0, Total=4290 [2022-07-22 10:31:11,419 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 82 mSDsluCounter, 859 mSDsCounter, 0 mSdLazyCounter, 1935 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 2048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 38 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 10:31:11,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 903 Invalid, 2048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1935 Invalid, 0 Unknown, 38 Unchecked, 0.7s Time] [2022-07-22 10:31:11,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-22 10:31:11,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-07-22 10:31:11,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 12 states have call successors, (12), 10 states have call predecessors, (12), 10 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-07-22 10:31:11,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 127 transitions. [2022-07-22 10:31:11,445 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 127 transitions. Word has length 127 [2022-07-22 10:31:11,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:31:11,445 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 127 transitions. [2022-07-22 10:31:11,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.8979591836734695) internal successors, (142), 45 states have internal predecessors, (142), 20 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 22 states have call predecessors, (23), 20 states have call successors, (23) [2022-07-22 10:31:11,445 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 127 transitions. [2022-07-22 10:31:11,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-07-22 10:31:11,446 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:31:11,446 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:31:11,465 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2022-07-22 10:31:11,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:11,655 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:31:11,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:31:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash 485078429, now seen corresponding path program 29 times [2022-07-22 10:31:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:31:11,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005777827] [2022-07-22 10:31:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:31:11,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:31:11,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:11,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:31:11,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:11,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:31:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:31:12,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:31:12,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:31:12,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:31:12,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:31:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:31:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:31:12,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:31:12,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:31:12,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:31:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 30 proven. 348 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-22 10:31:12,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:31:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005777827] [2022-07-22 10:31:12,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005777827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:12,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578544416] [2022-07-22 10:31:12,046 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:31:12,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:12,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:31:12,047 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) [2022-07-22 10:31:12,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2022-07-22 10:31:12,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2022-07-22 10:31:12,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:31:12,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 56 conjunts are in the unsatisfiable core [2022-07-22 10:31:12,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:31:12,556 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 [2022-07-22 10:31:14,711 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:31:14,711 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:31:14,991 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:31:15,025 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 68 proven. 348 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2022-07-22 10:31:15,026 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:15,169 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:31:15,172 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 37 treesize of output 33 [2022-07-22 10:31:15,373 INFO L134 CoverageAnalysis]: Checked inductivity of 582 backedges. 30 proven. 348 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-22 10:31:15,373 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578544416] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:31:15,373 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:31:15,373 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 52 [2022-07-22 10:31:15,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173853620] [2022-07-22 10:31:15,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:15,374 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 10:31:15,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:15,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 10:31:15,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2460, Unknown=1, NotChecked=0, Total=2652 [2022-07-22 10:31:15,375 INFO L87 Difference]: Start difference. First operand 124 states and 127 transitions. Second operand has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2022-07-22 10:31:16,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:31:16,224 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-07-22 10:31:16,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-22 10:31:16,225 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) Word has length 131 [2022-07-22 10:31:16,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:31:16,226 INFO L225 Difference]: With dead ends: 172 [2022-07-22 10:31:16,226 INFO L226 Difference]: Without dead ends: 170 [2022-07-22 10:31:16,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 260 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=313, Invalid=4108, Unknown=1, NotChecked=0, Total=4422 [2022-07-22 10:31:16,227 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 88 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 1646 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 663 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 1646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 10:31:16,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 663 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 1646 Invalid, 0 Unknown, 81 Unchecked, 0.6s Time] [2022-07-22 10:31:16,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-22 10:31:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2022-07-22 10:31:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 112 states have (on average 1.0267857142857142) internal successors, (115), 112 states have internal predecessors, (115), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 10:31:16,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-07-22 10:31:16,252 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 131 [2022-07-22 10:31:16,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:31:16,252 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-07-22 10:31:16,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.9038461538461537) internal successors, (151), 48 states have internal predecessors, (151), 21 states have call successors, (22), 2 states have call predecessors, (22), 3 states have return successors, (23), 23 states have call predecessors, (23), 21 states have call successors, (23) [2022-07-22 10:31:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-07-22 10:31:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-07-22 10:31:16,253 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:31:16,253 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 10, 10, 10, 10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:31:16,269 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2022-07-22 10:31:16,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:16,454 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:31:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:31:16,454 INFO L85 PathProgramCache]: Analyzing trace with hash -2003969005, now seen corresponding path program 30 times [2022-07-22 10:31:16,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:31:16,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104721499] [2022-07-22 10:31:16,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:31:16,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:31:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:31:16,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:31:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:31:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:31:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:31:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:31:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:31:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:31:16,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:31:16,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:31:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:31:16,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:31:16,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 33 proven. 379 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-22 10:31:16,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:31:16,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104721499] [2022-07-22 10:31:16,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104721499] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:16,884 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686342511] [2022-07-22 10:31:16,884 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:31:16,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:16,884 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:31:16,886 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) [2022-07-22 10:31:16,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2022-07-22 10:31:17,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2022-07-22 10:31:17,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:31:17,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-22 10:31:17,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:31:17,545 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 [2022-07-22 10:31:18,171 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 10:31:18,171 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 25 treesize of output 12 [2022-07-22 10:31:18,201 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 186 proven. 226 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-22 10:31:18,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:18,943 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:31:18,949 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 45 treesize of output 38 [2022-07-22 10:31:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 93 proven. 319 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-22 10:31:19,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686342511] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:31:19,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:31:19,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 30, 30] total 80 [2022-07-22 10:31:19,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256289009] [2022-07-22 10:31:19,590 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:19,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-22 10:31:19,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:19,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-22 10:31:19,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=652, Invalid=5668, Unknown=0, NotChecked=0, Total=6320 [2022-07-22 10:31:19,592 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-22 10:31:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:31:21,819 INFO L93 Difference]: Finished difference Result 176 states and 180 transitions. [2022-07-22 10:31:21,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-22 10:31:21,820 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 135 [2022-07-22 10:31:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:31:21,821 INFO L225 Difference]: With dead ends: 176 [2022-07-22 10:31:21,821 INFO L226 Difference]: Without dead ends: 132 [2022-07-22 10:31:21,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 262 SyntacticMatches, 1 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4792 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1737, Invalid=15819, Unknown=0, NotChecked=0, Total=17556 [2022-07-22 10:31:21,822 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 76 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1070 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 1072 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 239 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:31:21,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 1072 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1070 Invalid, 0 Unknown, 239 Unchecked, 0.4s Time] [2022-07-22 10:31:21,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-07-22 10:31:21,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2022-07-22 10:31:21,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 10:31:21,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2022-07-22 10:31:21,843 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 135 [2022-07-22 10:31:21,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:31:21,844 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2022-07-22 10:31:21,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.8) internal successors, (224), 75 states have internal predecessors, (224), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-22 10:31:21,844 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2022-07-22 10:31:21,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-07-22 10:31:21,845 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:31:21,845 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:31:21,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2022-07-22 10:31:22,066 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,SelfDestructingSolverStorable34 [2022-07-22 10:31:22,066 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:31:22,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:31:22,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1501516640, now seen corresponding path program 31 times [2022-07-22 10:31:22,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:31:22,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203710033] [2022-07-22 10:31:22,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:31:22,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:31:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:31:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:31:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:31:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:31:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:31:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:31:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:31:22,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:31:22,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:31:22,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:31:22,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:31:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:31:22,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:31:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,495 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 30 proven. 395 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-22 10:31:22,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:31:22,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203710033] [2022-07-22 10:31:22,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203710033] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:22,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013387104] [2022-07-22 10:31:22,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:31:22,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:22,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:31:22,500 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) [2022-07-22 10:31:22,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2022-07-22 10:31:22,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:22,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 59 conjunts are in the unsatisfiable core [2022-07-22 10:31:22,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:31:23,014 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 [2022-07-22 10:31:23,109 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:31:23,110 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:31:23,220 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:31:23,220 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:31:23,481 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:31:23,510 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 109 proven. 392 refuted. 0 times theorem prover too weak. 170 trivial. 0 not checked. [2022-07-22 10:31:23,510 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:23,705 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:31:23,707 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 37 treesize of output 33 [2022-07-22 10:31:23,919 INFO L134 CoverageAnalysis]: Checked inductivity of 671 backedges. 30 proven. 394 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2022-07-22 10:31:23,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013387104] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:31:23,919 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:31:23,920 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2022-07-22 10:31:23,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16814924] [2022-07-22 10:31:23,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:23,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 10:31:23,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:23,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 10:31:23,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=2558, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 10:31:23,923 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2022-07-22 10:31:24,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:31:24,834 INFO L93 Difference]: Finished difference Result 141 states and 144 transitions. [2022-07-22 10:31:24,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-22 10:31:24,835 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) Word has length 139 [2022-07-22 10:31:24,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:31:24,837 INFO L225 Difference]: With dead ends: 141 [2022-07-22 10:31:24,837 INFO L226 Difference]: Without dead ends: 139 [2022-07-22 10:31:24,838 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 276 SyntacticMatches, 13 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1469 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=310, Invalid=4112, Unknown=0, NotChecked=0, Total=4422 [2022-07-22 10:31:24,838 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 99 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 1918 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 1004 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 10:31:24,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 1004 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1918 Invalid, 0 Unknown, 88 Unchecked, 0.7s Time] [2022-07-22 10:31:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-07-22 10:31:24,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 136. [2022-07-22 10:31:24,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 111 states have (on average 1.018018018018018) internal successors, (113), 111 states have internal predecessors, (113), 13 states have call successors, (13), 11 states have call predecessors, (13), 11 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2022-07-22 10:31:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 139 transitions. [2022-07-22 10:31:24,867 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 139 transitions. Word has length 139 [2022-07-22 10:31:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:31:24,867 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 139 transitions. [2022-07-22 10:31:24,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.943396226415094) internal successors, (156), 49 states have internal predecessors, (156), 22 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 24 states have call predecessors, (25), 22 states have call successors, (25) [2022-07-22 10:31:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 139 transitions. [2022-07-22 10:31:24,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-07-22 10:31:24,868 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:31:24,869 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:31:24,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2022-07-22 10:31:25,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-07-22 10:31:25,091 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:31:25,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:31:25,092 INFO L85 PathProgramCache]: Analyzing trace with hash 566812758, now seen corresponding path program 32 times [2022-07-22 10:31:25,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:31:25,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781810432] [2022-07-22 10:31:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:31:25,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:31:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:31:25,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:31:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:31:25,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:31:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:31:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:31:25,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:31:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:31:25,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:31:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:31:25,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:31:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:31:25,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:31:25,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 33 proven. 426 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-22 10:31:25,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:31:25,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781810432] [2022-07-22 10:31:25,567 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781810432] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:25,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753452275] [2022-07-22 10:31:25,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:31:25,567 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:25,568 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:31:25,572 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) [2022-07-22 10:31:25,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2022-07-22 10:31:25,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:31:25,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:31:25,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 60 conjunts are in the unsatisfiable core [2022-07-22 10:31:25,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:31:26,309 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 [2022-07-22 10:31:28,491 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:31:28,491 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:31:28,813 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:31:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 75 proven. 426 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-07-22 10:31:28,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:29,008 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:31:29,010 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 37 treesize of output 33 [2022-07-22 10:31:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 705 backedges. 33 proven. 426 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-22 10:31:29,225 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753452275] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:31:29,225 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:31:29,225 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 56 [2022-07-22 10:31:29,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944929267] [2022-07-22 10:31:29,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:29,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-07-22 10:31:29,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:29,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-07-22 10:31:29,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=2872, Unknown=1, NotChecked=0, Total=3080 [2022-07-22 10:31:29,227 INFO L87 Difference]: Start difference. First operand 136 states and 139 transitions. Second operand has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2022-07-22 10:31:32,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:31:32,036 INFO L93 Difference]: Finished difference Result 188 states and 192 transitions. [2022-07-22 10:31:32,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-07-22 10:31:32,037 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) Word has length 143 [2022-07-22 10:31:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:31:32,038 INFO L225 Difference]: With dead ends: 188 [2022-07-22 10:31:32,038 INFO L226 Difference]: Without dead ends: 186 [2022-07-22 10:31:32,039 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 285 SyntacticMatches, 9 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=332, Invalid=4778, Unknown=2, NotChecked=0, Total=5112 [2022-07-22 10:31:32,039 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 110 mSDsluCounter, 1101 mSDsCounter, 0 mSdLazyCounter, 1693 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 1841 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 1693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 98 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 10:31:32,039 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 1146 Invalid, 1841 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 1693 Invalid, 0 Unknown, 98 Unchecked, 0.6s Time] [2022-07-22 10:31:32,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-07-22 10:31:32,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2022-07-22 10:31:32,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 10:31:32,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 153 transitions. [2022-07-22 10:31:32,074 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 153 transitions. Word has length 143 [2022-07-22 10:31:32,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:31:32,075 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 153 transitions. [2022-07-22 10:31:32,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9464285714285716) internal successors, (165), 52 states have internal predecessors, (165), 23 states have call successors, (24), 2 states have call predecessors, (24), 3 states have return successors, (25), 25 states have call predecessors, (25), 23 states have call successors, (25) [2022-07-22 10:31:32,075 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 153 transitions. [2022-07-22 10:31:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-07-22 10:31:32,076 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:31:32,076 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 11, 11, 11, 11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:31:32,102 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2022-07-22 10:31:32,291 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,SelfDestructingSolverStorable36 [2022-07-22 10:31:32,291 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:31:32,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:31:32,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1610023500, now seen corresponding path program 33 times [2022-07-22 10:31:32,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:31:32,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092934562] [2022-07-22 10:31:32,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:31:32,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:31:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:31:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:31:32,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:31:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:31:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:31:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:31:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:31:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:31:32,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:31:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:31:32,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:31:32,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:31:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:31:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:32,722 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 36 proven. 461 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-22 10:31:32,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:31:32,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092934562] [2022-07-22 10:31:32,722 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092934562] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:32,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121564310] [2022-07-22 10:31:32,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:31:32,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:32,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:31:32,724 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) [2022-07-22 10:31:32,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2022-07-22 10:31:33,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2022-07-22 10:31:33,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:31:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 10:31:33,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:31:33,510 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 [2022-07-22 10:31:34,220 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 10:31:34,220 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 25 treesize of output 12 [2022-07-22 10:31:34,250 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 226 proven. 271 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-22 10:31:34,250 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:35,060 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-07-22 10:31:35,063 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 42 treesize of output 36 [2022-07-22 10:31:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 743 backedges. 216 proven. 281 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-22 10:31:35,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121564310] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:31:35,790 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:31:35,791 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 86 [2022-07-22 10:31:35,791 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020126023] [2022-07-22 10:31:35,791 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:35,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-07-22 10:31:35,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:35,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-07-22 10:31:35,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=6541, Unknown=0, NotChecked=0, Total=7310 [2022-07-22 10:31:35,794 INFO L87 Difference]: Start difference. First operand 149 states and 153 transitions. Second operand has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) [2022-07-22 10:31:38,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:31:38,330 INFO L93 Difference]: Finished difference Result 192 states and 196 transitions. [2022-07-22 10:31:38,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-07-22 10:31:38,330 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) Word has length 147 [2022-07-22 10:31:38,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:31:38,331 INFO L225 Difference]: With dead ends: 192 [2022-07-22 10:31:38,331 INFO L226 Difference]: Without dead ends: 144 [2022-07-22 10:31:38,332 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5628 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2016, Invalid=18576, Unknown=0, NotChecked=0, Total=20592 [2022-07-22 10:31:38,333 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 106 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 1154 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 275 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:31:38,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 1154 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 1089 Invalid, 0 Unknown, 275 Unchecked, 0.4s Time] [2022-07-22 10:31:38,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-07-22 10:31:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-07-22 10:31:38,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 117 states have (on average 1.017094017094017) internal successors, (119), 117 states have internal predecessors, (119), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 10:31:38,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-07-22 10:31:38,366 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 147 [2022-07-22 10:31:38,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:31:38,366 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-07-22 10:31:38,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.8488372093023258) internal successors, (245), 81 states have internal predecessors, (245), 34 states have call successors, (35), 1 states have call predecessors, (35), 2 states have return successors, (36), 36 states have call predecessors, (36), 34 states have call successors, (36) [2022-07-22 10:31:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-07-22 10:31:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-07-22 10:31:38,368 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:31:38,368 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:31:38,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2022-07-22 10:31:38,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:38,583 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:31:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:31:38,584 INFO L85 PathProgramCache]: Analyzing trace with hash 799601049, now seen corresponding path program 34 times [2022-07-22 10:31:38,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:31:38,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073358646] [2022-07-22 10:31:38,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:31:38,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:31:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:38,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:31:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:38,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:31:38,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:31:39,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:31:39,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:31:39,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:31:39,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:31:39,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:31:39,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:31:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:31:39,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:31:39,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:31:39,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:31:39,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:31:39,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:39,043 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 33 proven. 477 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-22 10:31:39,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:31:39,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073358646] [2022-07-22 10:31:39,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073358646] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:39,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923946531] [2022-07-22 10:31:39,043 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:31:39,044 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:39,044 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:31:39,045 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) [2022-07-22 10:31:39,047 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2022-07-22 10:31:39,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:31:39,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:31:39,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 63 conjunts are in the unsatisfiable core [2022-07-22 10:31:39,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:31:39,636 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 [2022-07-22 10:31:39,732 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:31:39,732 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:31:39,843 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:31:39,843 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:31:40,153 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:31:40,184 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 120 proven. 474 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2022-07-22 10:31:40,185 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:40,405 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:31:40,408 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 37 treesize of output 33 [2022-07-22 10:31:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 802 backedges. 33 proven. 476 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2022-07-22 10:31:40,677 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923946531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:31:40,677 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:31:40,677 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2022-07-22 10:31:40,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244665514] [2022-07-22 10:31:40,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:40,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-07-22 10:31:40,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:40,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-07-22 10:31:40,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=2978, Unknown=0, NotChecked=0, Total=3192 [2022-07-22 10:31:40,679 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2022-07-22 10:31:41,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:31:41,833 INFO L93 Difference]: Finished difference Result 158 states and 161 transitions. [2022-07-22 10:31:41,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-07-22 10:31:41,834 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) Word has length 151 [2022-07-22 10:31:41,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:31:41,834 INFO L225 Difference]: With dead ends: 158 [2022-07-22 10:31:41,834 INFO L226 Difference]: Without dead ends: 156 [2022-07-22 10:31:41,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 379 GetRequests, 292 SyntacticMatches, 13 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1876 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=372, Invalid=5328, Unknown=0, NotChecked=0, Total=5700 [2022-07-22 10:31:41,835 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 109 mSDsluCounter, 1293 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1343 SdHoareTripleChecker+Invalid, 2573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 10:31:41,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1343 Invalid, 2573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 2425 Invalid, 0 Unknown, 47 Unchecked, 0.9s Time] [2022-07-22 10:31:41,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-07-22 10:31:41,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2022-07-22 10:31:41,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 121 states have (on average 1.0165289256198347) internal successors, (123), 121 states have internal predecessors, (123), 14 states have call successors, (14), 12 states have call predecessors, (14), 12 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2022-07-22 10:31:41,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 151 transitions. [2022-07-22 10:31:41,868 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 151 transitions. Word has length 151 [2022-07-22 10:31:41,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:31:41,869 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 151 transitions. [2022-07-22 10:31:41,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.982456140350877) internal successors, (170), 53 states have internal predecessors, (170), 24 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 26 states have call predecessors, (27), 24 states have call successors, (27) [2022-07-22 10:31:41,869 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 151 transitions. [2022-07-22 10:31:41,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-07-22 10:31:41,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:31:41,870 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:31:41,895 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2022-07-22 10:31:42,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-07-22 10:31:42,094 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:31:42,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:31:42,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1897314831, now seen corresponding path program 35 times [2022-07-22 10:31:42,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:31:42,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914753176] [2022-07-22 10:31:42,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:31:42,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:31:42,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:31:42,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:31:42,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:31:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:31:42,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:31:42,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:31:42,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:31:42,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:31:42,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:31:42,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:31:42,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:31:42,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:31:42,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:31:42,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:31:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:42,608 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 36 proven. 512 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-22 10:31:42,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:31:42,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914753176] [2022-07-22 10:31:42,608 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1914753176] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:42,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818691458] [2022-07-22 10:31:42,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:31:42,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:42,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:31:42,610 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) [2022-07-22 10:31:42,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2022-07-22 10:31:42,826 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-07-22 10:31:42,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:31:42,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 64 conjunts are in the unsatisfiable core [2022-07-22 10:31:42,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:31:43,436 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 [2022-07-22 10:31:43,606 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:31:43,606 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:31:43,987 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:31:44,019 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 82 proven. 512 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-22 10:31:44,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:44,188 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:31:44,191 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 37 treesize of output 33 [2022-07-22 10:31:44,415 INFO L134 CoverageAnalysis]: Checked inductivity of 840 backedges. 36 proven. 512 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-22 10:31:44,415 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1818691458] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:31:44,415 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:31:44,415 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 60 [2022-07-22 10:31:44,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234304864] [2022-07-22 10:31:44,415 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:44,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-07-22 10:31:44,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:44,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-07-22 10:31:44,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3317, Unknown=0, NotChecked=0, Total=3540 [2022-07-22 10:31:44,416 INFO L87 Difference]: Start difference. First operand 148 states and 151 transitions. Second operand has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-07-22 10:31:45,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:31:45,550 INFO L93 Difference]: Finished difference Result 209 states and 213 transitions. [2022-07-22 10:31:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-22 10:31:45,550 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) Word has length 155 [2022-07-22 10:31:45,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:31:45,550 INFO L225 Difference]: With dead ends: 209 [2022-07-22 10:31:45,551 INFO L226 Difference]: Without dead ends: 207 [2022-07-22 10:31:45,551 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 310 SyntacticMatches, 9 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=5930, Unknown=0, NotChecked=0, Total=6320 [2022-07-22 10:31:45,551 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 1278 mSDsCounter, 0 mSdLazyCounter, 2425 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1327 SdHoareTripleChecker+Invalid, 2669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 2425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 185 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 10:31:45,551 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1327 Invalid, 2669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 2425 Invalid, 0 Unknown, 185 Unchecked, 0.8s Time] [2022-07-22 10:31:45,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2022-07-22 10:31:45,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 161. [2022-07-22 10:31:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 10:31:45,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-07-22 10:31:45,578 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 155 [2022-07-22 10:31:45,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:31:45,578 INFO L495 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-07-22 10:31:45,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.9833333333333334) internal successors, (179), 56 states have internal predecessors, (179), 25 states have call successors, (26), 2 states have call predecessors, (26), 3 states have return successors, (27), 27 states have call predecessors, (27), 25 states have call successors, (27) [2022-07-22 10:31:45,579 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-07-22 10:31:45,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-07-22 10:31:45,580 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:31:45,580 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 12, 12, 12, 12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:31:45,605 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2022-07-22 10:31:45,797 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,SelfDestructingSolverStorable39 [2022-07-22 10:31:45,797 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:31:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:31:45,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1021269893, now seen corresponding path program 36 times [2022-07-22 10:31:45,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:31:45,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15784830] [2022-07-22 10:31:45,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:31:45,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:31:45,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:31:46,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:31:46,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:31:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:31:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:31:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:31:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:31:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:31:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:31:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:31:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:31:46,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:31:46,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:31:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:31:46,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:31:46,540 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 39 proven. 551 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-22 10:31:46,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:31:46,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15784830] [2022-07-22 10:31:46,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15784830] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:46,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797779569] [2022-07-22 10:31:46,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:31:46,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:31:46,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:31:46,544 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) [2022-07-22 10:31:46,557 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2022-07-22 10:31:46,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2022-07-22 10:31:46,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:31:46,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 55 conjunts are in the unsatisfiable core [2022-07-22 10:31:46,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:31:47,270 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 [2022-07-22 10:31:48,548 WARN L855 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_61| Int) (|v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| Int) (|v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_61| Int)) (and (< |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| (select (select |c_#memory_int| |v_ULTIMATE.start_main_~#a~0#1.base_BEFORE_CALL_61|) (+ |v_ULTIMATE.start_main_~#a~0#1.offset_BEFORE_CALL_61| (* |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| 4) (- 4)))) (<= |v_ULTIMATE.start_main_~i~0#1_BEFORE_CALL_482| 12))) is different from true [2022-07-22 10:31:53,964 INFO L356 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2022-07-22 10:31:53,964 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 27 [2022-07-22 10:31:54,893 INFO L356 Elim1Store]: treesize reduction 50, result has 5.7 percent of original size [2022-07-22 10:31:54,893 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 15 [2022-07-22 10:31:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 882 backedges. 319 proven. 317 refuted. 0 times theorem prover too weak. 246 trivial. 0 not checked. [2022-07-22 10:31:54,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:31:59,657 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797779569] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:31:59,657 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:31:59,657 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 39] total 69 [2022-07-22 10:31:59,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97915068] [2022-07-22 10:31:59,657 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:31:59,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-07-22 10:31:59,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:31:59,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-07-22 10:31:59,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=6454, Unknown=7, NotChecked=166, Total=7310 [2022-07-22 10:31:59,660 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) [2022-07-22 10:32:04,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:04,541 INFO L93 Difference]: Finished difference Result 225 states and 230 transitions. [2022-07-22 10:32:04,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-07-22 10:32:04,541 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) Word has length 159 [2022-07-22 10:32:04,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:04,542 INFO L225 Difference]: With dead ends: 225 [2022-07-22 10:32:04,542 INFO L226 Difference]: Without dead ends: 173 [2022-07-22 10:32:04,545 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 210 SyntacticMatches, 2 SemanticMatches, 172 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 9449 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=2493, Invalid=27260, Unknown=7, NotChecked=342, Total=30102 [2022-07-22 10:32:04,545 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 255 mSDsluCounter, 1979 mSDsCounter, 0 mSdLazyCounter, 2353 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 2053 SdHoareTripleChecker+Invalid, 3078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 2353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 442 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:04,546 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 2053 Invalid, 3078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 2353 Invalid, 0 Unknown, 442 Unchecked, 1.0s Time] [2022-07-22 10:32:04,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-22 10:32:04,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2022-07-22 10:32:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 10:32:04,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 159 transitions. [2022-07-22 10:32:04,576 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 159 transitions. Word has length 159 [2022-07-22 10:32:04,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:04,576 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 159 transitions. [2022-07-22 10:32:04,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 2.746268656716418) internal successors, (184), 63 states have internal predecessors, (184), 26 states have call successors, (27), 2 states have call predecessors, (27), 3 states have return successors, (27), 27 states have call predecessors, (27), 26 states have call successors, (27) [2022-07-22 10:32:04,577 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 159 transitions. [2022-07-22 10:32:04,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-07-22 10:32:04,578 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:04,583 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:04,607 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2022-07-22 10:32:04,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:04,803 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:04,804 INFO L85 PathProgramCache]: Analyzing trace with hash -827326766, now seen corresponding path program 37 times [2022-07-22 10:32:04,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:04,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738577789] [2022-07-22 10:32:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:04,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:04,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:05,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:05,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:05,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:05,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:05,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:05,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:05,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:05,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:05,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:05,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 36 proven. 567 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-22 10:32:05,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:05,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738577789] [2022-07-22 10:32:05,303 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738577789] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:05,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788475944] [2022-07-22 10:32:05,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:32:05,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:05,303 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:05,304 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:05,305 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2022-07-22 10:32:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 67 conjunts are in the unsatisfiable core [2022-07-22 10:32:05,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:06,010 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 [2022-07-22 10:32:06,099 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:06,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:06,206 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:06,206 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:06,578 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:32:06,611 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 131 proven. 564 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2022-07-22 10:32:06,611 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:06,828 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:32:06,830 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 37 treesize of output 33 [2022-07-22 10:32:07,068 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 36 proven. 566 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-07-22 10:32:07,068 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1788475944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:07,068 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:07,069 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2022-07-22 10:32:07,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787026202] [2022-07-22 10:32:07,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:07,069 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-07-22 10:32:07,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:07,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-07-22 10:32:07,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=3430, Unknown=0, NotChecked=0, Total=3660 [2022-07-22 10:32:07,071 INFO L87 Difference]: Start difference. First operand 156 states and 159 transitions. Second operand has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2022-07-22 10:32:08,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:08,503 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2022-07-22 10:32:08,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-22 10:32:08,504 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) Word has length 163 [2022-07-22 10:32:08,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:08,504 INFO L225 Difference]: With dead ends: 170 [2022-07-22 10:32:08,504 INFO L226 Difference]: Without dead ends: 168 [2022-07-22 10:32:08,505 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 317 SyntacticMatches, 13 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=396, Invalid=6084, Unknown=0, NotChecked=0, Total=6480 [2022-07-22 10:32:08,505 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 127 mSDsluCounter, 1675 mSDsCounter, 0 mSdLazyCounter, 3296 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 1728 SdHoareTripleChecker+Invalid, 3501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 88 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:08,505 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 1728 Invalid, 3501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3296 Invalid, 0 Unknown, 88 Unchecked, 1.1s Time] [2022-07-22 10:32:08,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-07-22 10:32:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 160. [2022-07-22 10:32:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 15 states have call successors, (15), 13 states have call predecessors, (15), 13 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-07-22 10:32:08,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-07-22 10:32:08,536 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 163 [2022-07-22 10:32:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:08,536 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-07-22 10:32:08,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.0163934426229506) internal successors, (184), 57 states have internal predecessors, (184), 26 states have call successors, (28), 2 states have call predecessors, (28), 3 states have return successors, (29), 28 states have call predecessors, (29), 26 states have call successors, (29) [2022-07-22 10:32:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-07-22 10:32:08,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-07-22 10:32:08,537 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:08,537 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:08,553 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2022-07-22 10:32:08,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2022-07-22 10:32:08,737 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:08,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:08,738 INFO L85 PathProgramCache]: Analyzing trace with hash -286096696, now seen corresponding path program 38 times [2022-07-22 10:32:08,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:08,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759515786] [2022-07-22 10:32:08,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:08,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:08,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:09,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:09,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:09,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:09,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:09,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:09,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:09,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:09,453 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 39 proven. 606 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-22 10:32:09,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:09,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759515786] [2022-07-22 10:32:09,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759515786] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:09,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667964756] [2022-07-22 10:32:09,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:32:09,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:09,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:09,455 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:09,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2022-07-22 10:32:09,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:32:09,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:09,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 68 conjunts are in the unsatisfiable core [2022-07-22 10:32:09,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:10,059 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 [2022-07-22 10:32:10,181 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:10,181 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:10,609 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 10:32:10,634 INFO L134 CoverageAnalysis]: Checked inductivity of 987 backedges. 89 proven. 606 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2022-07-22 10:32:10,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:11,110 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667964756] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:11,111 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:32:11,111 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34] total 66 [2022-07-22 10:32:11,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848859313] [2022-07-22 10:32:11,111 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:11,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-22 10:32:11,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:11,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-22 10:32:11,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=356, Invalid=5806, Unknown=0, NotChecked=0, Total=6162 [2022-07-22 10:32:11,113 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-22 10:32:13,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:13,534 INFO L93 Difference]: Finished difference Result 233 states and 238 transitions. [2022-07-22 10:32:13,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 10:32:13,534 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) Word has length 167 [2022-07-22 10:32:13,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:13,535 INFO L225 Difference]: With dead ends: 233 [2022-07-22 10:32:13,535 INFO L226 Difference]: Without dead ends: 231 [2022-07-22 10:32:13,537 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 215 SyntacticMatches, 4 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=756, Invalid=12584, Unknown=0, NotChecked=0, Total=13340 [2022-07-22 10:32:13,540 INFO L413 NwaCegarLoop]: 50 mSDtfsCounter, 225 mSDsluCounter, 1604 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 1654 SdHoareTripleChecker+Invalid, 3893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:13,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 1654 Invalid, 3893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 3704 Invalid, 0 Unknown, 82 Unchecked, 1.3s Time] [2022-07-22 10:32:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-22 10:32:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 173. [2022-07-22 10:32:13,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 142 states have (on average 1.0211267605633803) internal successors, (145), 142 states have internal predecessors, (145), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 10:32:13,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-07-22 10:32:13,572 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 167 [2022-07-22 10:32:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:13,573 INFO L495 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-07-22 10:32:13,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 64 states have (on average 2.96875) internal successors, (190), 62 states have internal predecessors, (190), 28 states have call successors, (29), 2 states have call predecessors, (29), 3 states have return successors, (29), 29 states have call predecessors, (29), 28 states have call successors, (29) [2022-07-22 10:32:13,574 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-07-22 10:32:13,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-07-22 10:32:13,574 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:13,574 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 13, 13, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:13,598 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2022-07-22 10:32:13,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:13,775 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:13,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1640373182, now seen corresponding path program 39 times [2022-07-22 10:32:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:13,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018651928] [2022-07-22 10:32:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:13,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:14,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:14,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:14,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:14,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:14,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-22 10:32:14,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:14,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018651928] [2022-07-22 10:32:14,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018651928] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:14,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931733575] [2022-07-22 10:32:14,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:32:14,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:14,320 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:14,328 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:14,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2022-07-22 10:32:14,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2022-07-22 10:32:14,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:14,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-22 10:32:14,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:15,334 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 [2022-07-22 10:32:16,296 INFO L356 Elim1Store]: treesize reduction 11, result has 21.4 percent of original size [2022-07-22 10:32:16,296 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 21 treesize of output 10 [2022-07-22 10:32:16,329 INFO L134 CoverageAnalysis]: Checked inductivity of 1033 backedges. 42 proven. 649 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-22 10:32:16,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:17,098 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-07-22 10:32:17,101 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 32 treesize of output 28 [2022-07-22 10:32:17,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931733575] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:17,203 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:32:17,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36] total 66 [2022-07-22 10:32:17,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218295229] [2022-07-22 10:32:17,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:17,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-07-22 10:32:17,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:17,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-07-22 10:32:17,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=6395, Unknown=0, NotChecked=0, Total=6972 [2022-07-22 10:32:17,205 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) [2022-07-22 10:32:17,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:17,942 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2022-07-22 10:32:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 10:32:17,943 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) Word has length 171 [2022-07-22 10:32:17,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:17,943 INFO L225 Difference]: With dead ends: 223 [2022-07-22 10:32:17,944 INFO L226 Difference]: Without dead ends: 221 [2022-07-22 10:32:17,944 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 207 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2305 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=609, Invalid=6873, Unknown=0, NotChecked=0, Total=7482 [2022-07-22 10:32:17,944 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 109 mSDsluCounter, 1075 mSDsCounter, 0 mSdLazyCounter, 1795 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 2071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 222 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:17,944 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 1124 Invalid, 2071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1795 Invalid, 0 Unknown, 222 Unchecked, 0.6s Time] [2022-07-22 10:32:17,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-07-22 10:32:17,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 177. [2022-07-22 10:32:17,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 10:32:17,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-07-22 10:32:17,992 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 171 [2022-07-22 10:32:17,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:17,992 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-07-22 10:32:17,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9393939393939394) internal successors, (194), 62 states have internal predecessors, (194), 27 states have call successors, (28), 1 states have call predecessors, (28), 2 states have return successors, (29), 29 states have call predecessors, (29), 27 states have call successors, (29) [2022-07-22 10:32:17,993 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-07-22 10:32:17,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-22 10:32:17,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:17,994 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:18,021 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2022-07-22 10:32:18,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:18,207 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:18,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:18,208 INFO L85 PathProgramCache]: Analyzing trace with hash 714324747, now seen corresponding path program 40 times [2022-07-22 10:32:18,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:18,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093898220] [2022-07-22 10:32:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:18,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:18,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:18,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:18,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:18,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:19,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:19,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:19,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:19,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:19,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:19,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:19,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:32:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 39 proven. 665 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-22 10:32:19,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093898220] [2022-07-22 10:32:19,055 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093898220] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230500321] [2022-07-22 10:32:19,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:32:19,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:19,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:19,057 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:19,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2022-07-22 10:32:19,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:32:19,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:19,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 71 conjunts are in the unsatisfiable core [2022-07-22 10:32:19,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:19,819 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 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 [2022-07-22 10:32:19,948 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:19,948 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:20,046 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:20,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:20,482 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 19 treesize of output 7 [2022-07-22 10:32:20,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1100 backedges. 142 proven. 662 refuted. 0 times theorem prover too weak. 296 trivial. 0 not checked. [2022-07-22 10:32:20,508 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:20,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [230500321] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:20,988 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-07-22 10:32:20,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35] total 67 [2022-07-22 10:32:20,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277446704] [2022-07-22 10:32:20,988 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:20,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-07-22 10:32:20,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:20,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-07-22 10:32:20,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=5953, Unknown=0, NotChecked=0, Total=6320 [2022-07-22 10:32:20,989 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-07-22 10:32:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:23,373 INFO L93 Difference]: Finished difference Result 233 states and 237 transitions. [2022-07-22 10:32:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-07-22 10:32:23,374 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) Word has length 175 [2022-07-22 10:32:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:23,374 INFO L225 Difference]: With dead ends: 233 [2022-07-22 10:32:23,375 INFO L226 Difference]: Without dead ends: 231 [2022-07-22 10:32:23,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 212 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4758 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=731, Invalid=12609, Unknown=0, NotChecked=0, Total=13340 [2022-07-22 10:32:23,377 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 177 mSDsluCounter, 1479 mSDsCounter, 0 mSdLazyCounter, 3677 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 1533 SdHoareTripleChecker+Invalid, 3917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 3677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 78 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:23,377 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 1533 Invalid, 3917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 3677 Invalid, 0 Unknown, 78 Unchecked, 1.3s Time] [2022-07-22 10:32:23,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-07-22 10:32:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 177. [2022-07-22 10:32:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 146 states have (on average 1.0205479452054795) internal successors, (149), 146 states have internal predecessors, (149), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 10:32:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2022-07-22 10:32:23,411 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 175 [2022-07-22 10:32:23,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:23,412 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2022-07-22 10:32:23,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 66 states have (on average 2.9696969696969697) internal successors, (196), 63 states have internal predecessors, (196), 30 states have call successors, (31), 2 states have call predecessors, (31), 3 states have return successors, (31), 31 states have call predecessors, (31), 30 states have call successors, (31) [2022-07-22 10:32:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2022-07-22 10:32:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-07-22 10:32:23,412 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:23,413 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:23,430 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2022-07-22 10:32:23,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-07-22 10:32:23,613 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:23,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:23,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1634186828, now seen corresponding path program 41 times [2022-07-22 10:32:23,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:23,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101931941] [2022-07-22 10:32:23,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:23,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:23,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:23,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:23,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:23,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:23,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:23,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:23,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:23,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:23,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 289 proven. 374 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-22 10:32:23,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:23,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101931941] [2022-07-22 10:32:23,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101931941] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:23,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388494225] [2022-07-22 10:32:23,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:32:23,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:23,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:23,968 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:23,994 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2022-07-22 10:32:24,244 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2022-07-22 10:32:24,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:24,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 10:32:24,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-22 10:32:24,680 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 338 proven. 325 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-07-22 10:32:24,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1388494225] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:24,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:24,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 47 [2022-07-22 10:32:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947683775] [2022-07-22 10:32:24,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:24,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 10:32:24,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 10:32:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=515, Invalid=1647, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 10:32:24,833 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-07-22 10:32:25,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:25,203 INFO L93 Difference]: Finished difference Result 249 states and 254 transitions. [2022-07-22 10:32:25,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-07-22 10:32:25,203 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 175 [2022-07-22 10:32:25,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:25,204 INFO L225 Difference]: With dead ends: 249 [2022-07-22 10:32:25,204 INFO L226 Difference]: Without dead ends: 189 [2022-07-22 10:32:25,204 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 363 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=872, Invalid=2788, Unknown=0, NotChecked=0, Total=3660 [2022-07-22 10:32:25,205 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 324 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 427 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:25,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 353 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 427 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:32:25,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-07-22 10:32:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 172. [2022-07-22 10:32:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 141 states have (on average 1.0141843971631206) internal successors, (143), 141 states have internal predecessors, (143), 16 states have call successors, (16), 14 states have call predecessors, (16), 14 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-07-22 10:32:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2022-07-22 10:32:25,253 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 175 [2022-07-22 10:32:25,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:25,253 INFO L495 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2022-07-22 10:32:25,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.5319148936170213) internal successors, (166), 47 states have internal predecessors, (166), 15 states have call successors, (16), 1 states have call predecessors, (16), 1 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2022-07-22 10:32:25,253 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2022-07-22 10:32:25,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-07-22 10:32:25,254 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:25,254 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:25,271 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2022-07-22 10:32:25,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2022-07-22 10:32:25,454 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:25,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:25,454 INFO L85 PathProgramCache]: Analyzing trace with hash -38045055, now seen corresponding path program 42 times [2022-07-22 10:32:25,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:25,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195363917] [2022-07-22 10:32:25,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:25,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:26,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:26,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:26,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:26,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:26,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:26,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:26,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:26,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:26,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:26,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:26,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:26,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:26,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:32:26,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:26,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 42 proven. 708 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-22 10:32:26,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:26,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195363917] [2022-07-22 10:32:26,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195363917] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:26,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169315730] [2022-07-22 10:32:26,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:32:26,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:26,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:26,120 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:26,137 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2022-07-22 10:32:26,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2022-07-22 10:32:26,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:26,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 72 conjunts are in the unsatisfiable core [2022-07-22 10:32:26,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:27,248 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 [2022-07-22 10:32:27,436 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:32:27,437 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:32:27,929 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:32:27,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 96 proven. 708 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2022-07-22 10:32:27,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:28,158 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:32:28,160 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 37 treesize of output 33 [2022-07-22 10:32:28,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1146 backedges. 42 proven. 708 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-22 10:32:28,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169315730] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:28,421 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:28,421 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 68 [2022-07-22 10:32:28,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391461829] [2022-07-22 10:32:28,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:28,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-22 10:32:28,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:28,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-22 10:32:28,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=4301, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 10:32:28,422 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-22 10:32:29,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:29,996 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2022-07-22 10:32:29,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-07-22 10:32:29,996 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) Word has length 179 [2022-07-22 10:32:29,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:29,997 INFO L225 Difference]: With dead ends: 241 [2022-07-22 10:32:29,997 INFO L226 Difference]: Without dead ends: 239 [2022-07-22 10:32:29,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 349 SyntacticMatches, 9 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2441 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=438, Invalid=7572, Unknown=0, NotChecked=0, Total=8010 [2022-07-22 10:32:29,998 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 107 mSDsluCounter, 1787 mSDsCounter, 0 mSdLazyCounter, 3492 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 3665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 3492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:29,998 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 1842 Invalid, 3665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 3492 Invalid, 0 Unknown, 82 Unchecked, 1.2s Time] [2022-07-22 10:32:29,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-07-22 10:32:30,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 185. [2022-07-22 10:32:30,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 152 states have (on average 1.019736842105263) internal successors, (155), 152 states have internal predecessors, (155), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-22 10:32:30,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2022-07-22 10:32:30,056 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 179 [2022-07-22 10:32:30,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:30,057 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2022-07-22 10:32:30,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.0441176470588234) internal successors, (207), 64 states have internal predecessors, (207), 29 states have call successors, (30), 2 states have call predecessors, (30), 3 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-22 10:32:30,057 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2022-07-22 10:32:30,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-07-22 10:32:30,058 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:30,058 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 14, 14, 14, 14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:30,084 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2022-07-22 10:32:30,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2022-07-22 10:32:30,283 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:30,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:30,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1869254391, now seen corresponding path program 43 times [2022-07-22 10:32:30,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:30,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029293078] [2022-07-22 10:32:30,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:30,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:30,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:30,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:30,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:30,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:32:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-22 10:32:30,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:30,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029293078] [2022-07-22 10:32:30,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029293078] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:30,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583060277] [2022-07-22 10:32:30,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:32:30,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:30,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:30,980 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:31,005 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2022-07-22 10:32:31,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:31,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 73 conjunts are in the unsatisfiable core [2022-07-22 10:32:31,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:31,853 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 [2022-07-22 10:32:32,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:32:32,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-22 10:32:32,421 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:32,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-07-22 10:32:32,564 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 32 treesize of output 28 [2022-07-22 10:32:32,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1196 backedges. 45 proven. 755 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-22 10:32:32,834 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583060277] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:32,834 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:32,834 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 68 [2022-07-22 10:32:32,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883123096] [2022-07-22 10:32:32,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:32,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-07-22 10:32:32,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:32,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-07-22 10:32:32,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=4330, Unknown=0, NotChecked=0, Total=4556 [2022-07-22 10:32:32,835 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-22 10:32:35,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:35,577 INFO L93 Difference]: Finished difference Result 262 states and 267 transitions. [2022-07-22 10:32:35,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-22 10:32:35,577 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) Word has length 183 [2022-07-22 10:32:35,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:35,578 INFO L225 Difference]: With dead ends: 262 [2022-07-22 10:32:35,578 INFO L226 Difference]: Without dead ends: 260 [2022-07-22 10:32:35,579 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 361 SyntacticMatches, 6 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3601 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=739, Invalid=12601, Unknown=0, NotChecked=0, Total=13340 [2022-07-22 10:32:35,579 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 232 mSDsluCounter, 2381 mSDsCounter, 0 mSdLazyCounter, 4685 mSolverCounterSat, 222 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 2440 SdHoareTripleChecker+Invalid, 4907 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 222 IncrementalHoareTripleChecker+Valid, 4685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:35,580 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 2440 Invalid, 4907 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [222 Valid, 4685 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 10:32:35,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-07-22 10:32:35,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 189. [2022-07-22 10:32:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-22 10:32:35,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2022-07-22 10:32:35,629 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 183 [2022-07-22 10:32:35,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:35,629 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2022-07-22 10:32:35,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.1176470588235294) internal successors, (212), 64 states have internal predecessors, (212), 29 states have call successors, (30), 1 states have call predecessors, (30), 2 states have return successors, (31), 31 states have call predecessors, (31), 29 states have call successors, (31) [2022-07-22 10:32:35,629 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2022-07-22 10:32:35,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-22 10:32:35,630 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:35,630 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:35,649 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2022-07-22 10:32:35,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:35,831 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:35,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:35,832 INFO L85 PathProgramCache]: Analyzing trace with hash -443324860, now seen corresponding path program 44 times [2022-07-22 10:32:35,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:35,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114842187] [2022-07-22 10:32:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:35,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:35,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:36,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:36,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:36,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:36,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:36,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:36,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:36,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:36,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:32:36,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:32:36,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 42 proven. 771 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-22 10:32:36,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:36,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114842187] [2022-07-22 10:32:36,505 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114842187] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:36,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969583273] [2022-07-22 10:32:36,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:32:36,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:36,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:36,508 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:36,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2022-07-22 10:32:36,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:32:36,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:36,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 75 conjunts are in the unsatisfiable core [2022-07-22 10:32:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:37,322 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 [2022-07-22 10:32:37,417 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:37,417 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:37,536 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:37,536 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:38,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:32:38,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 153 proven. 768 refuted. 0 times theorem prover too weak. 346 trivial. 0 not checked. [2022-07-22 10:32:38,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:38,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:32:38,304 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 37 treesize of output 33 [2022-07-22 10:32:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1267 backedges. 42 proven. 770 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2022-07-22 10:32:38,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969583273] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:38,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:38,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 37, 37] total 71 [2022-07-22 10:32:38,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970557178] [2022-07-22 10:32:38,625 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:38,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-07-22 10:32:38,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:38,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-07-22 10:32:38,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4699, Unknown=0, NotChecked=0, Total=4970 [2022-07-22 10:32:38,627 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-22 10:32:40,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:40,450 INFO L93 Difference]: Finished difference Result 249 states and 253 transitions. [2022-07-22 10:32:40,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-07-22 10:32:40,450 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) Word has length 187 [2022-07-22 10:32:40,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:40,451 INFO L225 Difference]: With dead ends: 249 [2022-07-22 10:32:40,451 INFO L226 Difference]: Without dead ends: 247 [2022-07-22 10:32:40,452 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 374 SyntacticMatches, 13 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2794 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=455, Invalid=8101, Unknown=0, NotChecked=0, Total=8556 [2022-07-22 10:32:40,452 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 183 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 4013 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 184 SdHoareTripleChecker+Valid, 1794 SdHoareTripleChecker+Invalid, 4228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 4013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:40,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [184 Valid, 1794 Invalid, 4228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 4013 Invalid, 0 Unknown, 117 Unchecked, 1.4s Time] [2022-07-22 10:32:40,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2022-07-22 10:32:40,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 189. [2022-07-22 10:32:40,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 156 states have (on average 1.0192307692307692) internal successors, (159), 156 states have internal predecessors, (159), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-22 10:32:40,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2022-07-22 10:32:40,496 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 187 [2022-07-22 10:32:40,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:40,496 INFO L495 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2022-07-22 10:32:40,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.0428571428571427) internal successors, (213), 66 states have internal predecessors, (213), 31 states have call successors, (33), 2 states have call predecessors, (33), 3 states have return successors, (34), 33 states have call predecessors, (34), 31 states have call successors, (34) [2022-07-22 10:32:40,497 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2022-07-22 10:32:40,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-07-22 10:32:40,501 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:40,501 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:40,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2022-07-22 10:32:40,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2022-07-22 10:32:40,719 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:40,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1846642579, now seen corresponding path program 45 times [2022-07-22 10:32:40,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:40,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7977541] [2022-07-22 10:32:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:40,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:40,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:41,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:41,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:41,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:41,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:41,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:41,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:41,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:41,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:32:41,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 339 proven. 431 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-22 10:32:41,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:41,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7977541] [2022-07-22 10:32:41,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7977541] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:41,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322815439] [2022-07-22 10:32:41,117 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:32:41,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:41,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:41,119 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:41,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2022-07-22 10:32:41,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-07-22 10:32:41,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:41,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 10:32:41,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-22 10:32:42,184 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:42,370 INFO L134 CoverageAnalysis]: Checked inductivity of 1250 backedges. 392 proven. 378 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2022-07-22 10:32:42,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322815439] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:42,371 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:42,371 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 50 [2022-07-22 10:32:42,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120963437] [2022-07-22 10:32:42,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:42,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-07-22 10:32:42,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:42,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-07-22 10:32:42,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=1869, Unknown=0, NotChecked=0, Total=2450 [2022-07-22 10:32:42,372 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-22 10:32:42,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:42,773 INFO L93 Difference]: Finished difference Result 265 states and 270 transitions. [2022-07-22 10:32:42,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-22 10:32:42,774 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) Word has length 187 [2022-07-22 10:32:42,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:42,774 INFO L225 Difference]: With dead ends: 265 [2022-07-22 10:32:42,775 INFO L226 Difference]: Without dead ends: 201 [2022-07-22 10:32:42,775 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 388 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=986, Invalid=3174, Unknown=0, NotChecked=0, Total=4160 [2022-07-22 10:32:42,775 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 375 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:42,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [376 Valid, 319 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:32:42,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-07-22 10:32:42,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2022-07-22 10:32:42,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 17 states have call successors, (17), 15 states have call predecessors, (17), 15 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2022-07-22 10:32:42,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 187 transitions. [2022-07-22 10:32:42,824 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 187 transitions. Word has length 187 [2022-07-22 10:32:42,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:42,824 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 187 transitions. [2022-07-22 10:32:42,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.54) internal successors, (177), 50 states have internal predecessors, (177), 16 states have call successors, (17), 1 states have call predecessors, (17), 1 states have return successors, (17), 16 states have call predecessors, (17), 16 states have call successors, (17) [2022-07-22 10:32:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 187 transitions. [2022-07-22 10:32:42,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-07-22 10:32:42,825 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:42,826 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:42,850 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2022-07-22 10:32:43,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-07-22 10:32:43,048 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:43,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:43,048 INFO L85 PathProgramCache]: Analyzing trace with hash -1911496390, now seen corresponding path program 46 times [2022-07-22 10:32:43,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:43,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604675656] [2022-07-22 10:32:43,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:43,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:43,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:43,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:43,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:43,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:43,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:43,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:43,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:43,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:32:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:32:43,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:43,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 45 proven. 818 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-22 10:32:43,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:43,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604675656] [2022-07-22 10:32:43,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604675656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:43,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168164294] [2022-07-22 10:32:43,680 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:32:43,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:43,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:43,682 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:43,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2022-07-22 10:32:43,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:32:43,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:43,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 517 conjuncts, 76 conjunts are in the unsatisfiable core [2022-07-22 10:32:43,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:44,630 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 [2022-07-22 10:32:44,827 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:32:44,827 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:32:45,409 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:32:45,448 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 103 proven. 818 refuted. 0 times theorem prover too weak. 396 trivial. 0 not checked. [2022-07-22 10:32:45,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:45,652 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:32:45,654 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 37 treesize of output 33 [2022-07-22 10:32:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 1317 backedges. 45 proven. 818 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-22 10:32:45,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168164294] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:45,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:45,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 72 [2022-07-22 10:32:45,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085771880] [2022-07-22 10:32:45,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:45,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-22 10:32:45,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:45,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-22 10:32:45,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=4841, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 10:32:45,940 INFO L87 Difference]: Start difference. First operand 184 states and 187 transitions. Second operand has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-22 10:32:47,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:47,866 INFO L93 Difference]: Finished difference Result 257 states and 261 transitions. [2022-07-22 10:32:47,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-07-22 10:32:47,867 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 191 [2022-07-22 10:32:47,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:47,868 INFO L225 Difference]: With dead ends: 257 [2022-07-22 10:32:47,868 INFO L226 Difference]: Without dead ends: 255 [2022-07-22 10:32:47,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 373 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 2723 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=462, Invalid=8468, Unknown=0, NotChecked=0, Total=8930 [2022-07-22 10:32:47,869 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 111 mSDsluCounter, 2190 mSDsCounter, 0 mSdLazyCounter, 4302 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 2248 SdHoareTripleChecker+Invalid, 4533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 4302 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 132 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:47,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 2248 Invalid, 4533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 4302 Invalid, 0 Unknown, 132 Unchecked, 1.5s Time] [2022-07-22 10:32:47,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-07-22 10:32:47,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 197. [2022-07-22 10:32:47,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 162 states have (on average 1.0185185185185186) internal successors, (165), 162 states have internal predecessors, (165), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 10:32:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 201 transitions. [2022-07-22 10:32:47,936 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 201 transitions. Word has length 191 [2022-07-22 10:32:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:47,937 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 201 transitions. [2022-07-22 10:32:47,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.0694444444444446) internal successors, (221), 68 states have internal predecessors, (221), 31 states have call successors, (32), 2 states have call predecessors, (32), 3 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-22 10:32:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 201 transitions. [2022-07-22 10:32:47,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-07-22 10:32:47,938 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:47,938 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 15, 15, 15, 15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:47,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2022-07-22 10:32:48,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:48,159 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:48,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1959522608, now seen corresponding path program 47 times [2022-07-22 10:32:48,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:48,160 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253297946] [2022-07-22 10:32:48,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:48,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:48,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:48,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:48,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:48,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:48,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:48,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:48,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:48,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:48,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:48,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:48,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:48,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:48,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:32:48,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:32:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:48,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-22 10:32:48,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:48,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253297946] [2022-07-22 10:32:48,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253297946] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:48,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115044017] [2022-07-22 10:32:48,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:32:48,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:48,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:48,818 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:48,842 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2022-07-22 10:32:49,093 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2022-07-22 10:32:49,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 528 conjuncts, 77 conjunts are in the unsatisfiable core [2022-07-22 10:32:49,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:49,914 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 [2022-07-22 10:32:50,531 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:32:50,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-22 10:32:50,570 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:50,733 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 16 treesize of output 14 [2022-07-22 10:32:50,736 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 32 treesize of output 28 [2022-07-22 10:32:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1371 backedges. 48 proven. 869 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-22 10:32:51,047 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115044017] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:51,047 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:51,047 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 72 [2022-07-22 10:32:51,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097523947] [2022-07-22 10:32:51,047 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:51,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-07-22 10:32:51,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:51,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-07-22 10:32:51,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=4872, Unknown=0, NotChecked=0, Total=5112 [2022-07-22 10:32:51,049 INFO L87 Difference]: Start difference. First operand 197 states and 201 transitions. Second operand has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-22 10:32:54,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:54,137 INFO L93 Difference]: Finished difference Result 278 states and 283 transitions. [2022-07-22 10:32:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-07-22 10:32:54,138 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) Word has length 195 [2022-07-22 10:32:54,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:54,139 INFO L225 Difference]: With dead ends: 278 [2022-07-22 10:32:54,139 INFO L226 Difference]: Without dead ends: 276 [2022-07-22 10:32:54,140 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 385 SyntacticMatches, 6 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4072 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=786, Invalid=14220, Unknown=0, NotChecked=0, Total=15006 [2022-07-22 10:32:54,141 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 359 mSDsluCounter, 2022 mSDsCounter, 0 mSdLazyCounter, 4674 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 2084 SdHoareTripleChecker+Invalid, 4994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 4674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:54,141 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 2084 Invalid, 4994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 4674 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-07-22 10:32:54,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-07-22 10:32:54,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 201. [2022-07-22 10:32:54,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 10:32:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-07-22 10:32:54,210 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 195 [2022-07-22 10:32:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:54,211 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-07-22 10:32:54,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.138888888888889) internal successors, (226), 68 states have internal predecessors, (226), 31 states have call successors, (32), 1 states have call predecessors, (32), 2 states have return successors, (33), 33 states have call predecessors, (33), 31 states have call successors, (33) [2022-07-22 10:32:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-07-22 10:32:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-22 10:32:54,212 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:54,212 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:54,230 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2022-07-22 10:32:54,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2022-07-22 10:32:54,415 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:54,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1613643901, now seen corresponding path program 48 times [2022-07-22 10:32:54,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:54,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031956396] [2022-07-22 10:32:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:54,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:54,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:32:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:32:55,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:32:55,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:32:55,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:32:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:32:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:32:55,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:32:55,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:32:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:32:55,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:32:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:32:55,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:32:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:32:55,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:32:55,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:32:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:32:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-22 10:32:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:32:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 45 proven. 885 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-22 10:32:55,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:32:55,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031956396] [2022-07-22 10:32:55,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031956396] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:32:55,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977062972] [2022-07-22 10:32:55,106 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:32:55,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:32:55,107 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:32:55,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2022-07-22 10:32:55,539 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2022-07-22 10:32:55,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:32:55,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 537 conjuncts, 79 conjunts are in the unsatisfiable core [2022-07-22 10:32:55,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:32:56,285 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 [2022-07-22 10:32:56,388 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:56,389 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:56,525 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:32:56,525 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:32:57,121 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:32:57,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 164 proven. 882 refuted. 0 times theorem prover too weak. 400 trivial. 0 not checked. [2022-07-22 10:32:57,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:32:57,435 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:32:57,437 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 37 treesize of output 33 [2022-07-22 10:32:57,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1446 backedges. 45 proven. 884 refuted. 0 times theorem prover too weak. 517 trivial. 0 not checked. [2022-07-22 10:32:57,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977062972] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:32:57,749 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:32:57,749 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 73 [2022-07-22 10:32:57,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299657931] [2022-07-22 10:32:57,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:32:57,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-07-22 10:32:57,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:32:57,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-07-22 10:32:57,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=4978, Unknown=0, NotChecked=0, Total=5256 [2022-07-22 10:32:57,751 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) [2022-07-22 10:32:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:32:59,659 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2022-07-22 10:32:59,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-07-22 10:32:59,659 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) Word has length 199 [2022-07-22 10:32:59,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:32:59,660 INFO L225 Difference]: With dead ends: 265 [2022-07-22 10:32:59,661 INFO L226 Difference]: Without dead ends: 263 [2022-07-22 10:32:59,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 389 SyntacticMatches, 13 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2974 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=468, Invalid=8652, Unknown=0, NotChecked=0, Total=9120 [2022-07-22 10:32:59,662 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 173 mSDsluCounter, 1528 mSDsCounter, 0 mSdLazyCounter, 4163 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 1588 SdHoareTripleChecker+Invalid, 4383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 4163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 66 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:32:59,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 1588 Invalid, 4383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 4163 Invalid, 0 Unknown, 66 Unchecked, 1.4s Time] [2022-07-22 10:32:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-07-22 10:32:59,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 201. [2022-07-22 10:32:59,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 166 states have (on average 1.0180722891566265) internal successors, (169), 166 states have internal predecessors, (169), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 10:32:59,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2022-07-22 10:32:59,734 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 199 [2022-07-22 10:32:59,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:32:59,734 INFO L495 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2022-07-22 10:32:59,735 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.095890410958904) internal successors, (226), 69 states have internal predecessors, (226), 32 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 34 states have call predecessors, (35), 32 states have call successors, (35) [2022-07-22 10:32:59,735 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2022-07-22 10:32:59,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-07-22 10:32:59,736 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:32:59,736 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:32:59,762 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2022-07-22 10:32:59,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:32:59,951 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:32:59,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:32:59,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1727141414, now seen corresponding path program 49 times [2022-07-22 10:32:59,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:32:59,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54554821] [2022-07-22 10:32:59,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:32:59,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:32:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:33:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:33:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:33:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:33:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:33:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:33:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:33:00,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:33:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:33:00,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:33:00,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:33:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:33:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:33:00,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:33:00,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:33:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:33:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:33:00,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 393 proven. 492 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-22 10:33:00,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:00,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54554821] [2022-07-22 10:33:00,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54554821] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:00,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940299469] [2022-07-22 10:33:00,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:33:00,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:00,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:00,408 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:33:00,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2022-07-22 10:33:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:00,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 10:33:00,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:01,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-22 10:33:01,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:01,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1429 backedges. 450 proven. 435 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2022-07-22 10:33:01,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940299469] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:01,384 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:01,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 53 [2022-07-22 10:33:01,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196237523] [2022-07-22 10:33:01,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:01,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-07-22 10:33:01,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:01,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-07-22 10:33:01,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=651, Invalid=2105, Unknown=0, NotChecked=0, Total=2756 [2022-07-22 10:33:01,386 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-07-22 10:33:01,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:33:01,811 INFO L93 Difference]: Finished difference Result 281 states and 286 transitions. [2022-07-22 10:33:01,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-07-22 10:33:01,811 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) Word has length 199 [2022-07-22 10:33:01,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:33:01,812 INFO L225 Difference]: With dead ends: 281 [2022-07-22 10:33:01,812 INFO L226 Difference]: Without dead ends: 213 [2022-07-22 10:33:01,812 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 481 GetRequests, 413 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1107, Invalid=3585, Unknown=0, NotChecked=0, Total=4692 [2022-07-22 10:33:01,813 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 316 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 317 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 10:33:01,813 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [317 Valid, 326 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 10:33:01,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-07-22 10:33:01,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 196. [2022-07-22 10:33:01,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 18 states have call successors, (18), 16 states have call predecessors, (18), 16 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2022-07-22 10:33:01,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2022-07-22 10:33:01,869 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 199 [2022-07-22 10:33:01,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:33:01,869 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2022-07-22 10:33:01,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.547169811320755) internal successors, (188), 53 states have internal predecessors, (188), 17 states have call successors, (18), 1 states have call predecessors, (18), 1 states have return successors, (18), 17 states have call predecessors, (18), 17 states have call successors, (18) [2022-07-22 10:33:01,869 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2022-07-22 10:33:01,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-07-22 10:33:01,870 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:33:01,870 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:33:01,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2022-07-22 10:33:02,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-07-22 10:33:02,083 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:33:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:33:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash 785512179, now seen corresponding path program 50 times [2022-07-22 10:33:02,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:33:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70714119] [2022-07-22 10:33:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:33:02,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:33:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:33:02,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:33:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:33:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:33:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:33:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:33:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:33:02,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:33:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:33:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:33:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:33:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:33:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:33:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:33:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:33:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:33:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:33:02,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-22 10:33:02,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:02,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 48 proven. 936 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-22 10:33:02,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:02,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70714119] [2022-07-22 10:33:02,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70714119] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:02,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932146585] [2022-07-22 10:33:02,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 10:33:02,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:02,769 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:02,770 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:33:02,772 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2022-07-22 10:33:02,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 10:33:02,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:33:02,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 80 conjunts are in the unsatisfiable core [2022-07-22 10:33:02,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:03,745 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 [2022-07-22 10:33:05,958 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:33:05,959 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:33:06,621 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:33:06,661 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 110 proven. 936 refuted. 0 times theorem prover too weak. 454 trivial. 0 not checked. [2022-07-22 10:33:06,662 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:06,873 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:33:06,875 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 37 treesize of output 33 [2022-07-22 10:33:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1500 backedges. 48 proven. 936 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-22 10:33:07,191 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932146585] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:07,191 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:07,191 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 76 [2022-07-22 10:33:07,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084555898] [2022-07-22 10:33:07,191 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:07,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-22 10:33:07,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:07,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-22 10:33:07,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=5412, Unknown=1, NotChecked=0, Total=5700 [2022-07-22 10:33:07,193 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2022-07-22 10:33:09,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:33:09,016 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2022-07-22 10:33:09,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-07-22 10:33:09,016 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) Word has length 203 [2022-07-22 10:33:09,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:33:09,017 INFO L225 Difference]: With dead ends: 268 [2022-07-22 10:33:09,017 INFO L226 Difference]: Without dead ends: 266 [2022-07-22 10:33:09,018 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 514 GetRequests, 410 SyntacticMatches, 9 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2819 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=452, Invalid=8859, Unknown=1, NotChecked=0, Total=9312 [2022-07-22 10:33:09,019 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 136 mSDsluCounter, 1767 mSDsCounter, 0 mSdLazyCounter, 3970 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1827 SdHoareTripleChecker+Invalid, 4155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 3970 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-22 10:33:09,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1827 Invalid, 4155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 3970 Invalid, 0 Unknown, 116 Unchecked, 1.4s Time] [2022-07-22 10:33:09,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-07-22 10:33:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 209. [2022-07-22 10:33:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 172 states have (on average 1.0174418604651163) internal successors, (175), 172 states have internal predecessors, (175), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-22 10:33:09,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 213 transitions. [2022-07-22 10:33:09,095 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 213 transitions. Word has length 203 [2022-07-22 10:33:09,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:33:09,096 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 213 transitions. [2022-07-22 10:33:09,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.0921052631578947) internal successors, (235), 72 states have internal predecessors, (235), 33 states have call successors, (34), 2 states have call predecessors, (34), 3 states have return successors, (35), 35 states have call predecessors, (35), 33 states have call successors, (35) [2022-07-22 10:33:09,096 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 213 transitions. [2022-07-22 10:33:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-07-22 10:33:09,097 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:33:09,097 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 16, 16, 16, 16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:33:09,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2022-07-22 10:33:09,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2022-07-22 10:33:09,307 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:33:09,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:33:09,308 INFO L85 PathProgramCache]: Analyzing trace with hash -14056855, now seen corresponding path program 51 times [2022-07-22 10:33:09,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:33:09,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728062200] [2022-07-22 10:33:09,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:33:09,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:33:09,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:09,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:33:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:09,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:33:09,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:09,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:33:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:09,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:33:09,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:09,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:33:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:09,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:33:09,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:09,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:33:09,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:33:10,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:33:10,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:33:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:33:10,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:33:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:33:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:33:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:33:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:33:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:33:10,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-22 10:33:10,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 51 proven. 991 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-22 10:33:10,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:10,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728062200] [2022-07-22 10:33:10,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728062200] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:10,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234720594] [2022-07-22 10:33:10,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 10:33:10,012 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:10,012 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:10,013 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:33:10,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2022-07-22 10:33:11,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2022-07-22 10:33:11,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:33:11,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 559 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-22 10:33:11,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:11,964 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 [2022-07-22 10:33:13,206 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 10:33:13,206 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 25 treesize of output 12 [2022-07-22 10:33:13,260 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 486 proven. 556 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-22 10:33:13,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:14,717 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-07-22 10:33:14,719 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 42 treesize of output 36 [2022-07-22 10:33:15,976 INFO L134 CoverageAnalysis]: Checked inductivity of 1558 backedges. 471 proven. 571 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-22 10:33:15,976 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1234720594] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:15,976 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:15,977 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 116 [2022-07-22 10:33:15,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967460176] [2022-07-22 10:33:15,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:15,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-07-22 10:33:15,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:15,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-07-22 10:33:15,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1369, Invalid=11971, Unknown=0, NotChecked=0, Total=13340 [2022-07-22 10:33:15,979 INFO L87 Difference]: Start difference. First operand 209 states and 213 transitions. Second operand has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2022-07-22 10:33:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:33:20,496 INFO L93 Difference]: Finished difference Result 272 states and 276 transitions. [2022-07-22 10:33:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-07-22 10:33:20,497 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) Word has length 207 [2022-07-22 10:33:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:33:20,498 INFO L225 Difference]: With dead ends: 272 [2022-07-22 10:33:20,498 INFO L226 Difference]: Without dead ends: 204 [2022-07-22 10:33:20,500 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 407 SyntacticMatches, 1 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10978 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=3576, Invalid=35826, Unknown=0, NotChecked=0, Total=39402 [2022-07-22 10:33:20,500 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 153 mSDsluCounter, 1453 mSDsCounter, 0 mSdLazyCounter, 1903 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 1511 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 382 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 10:33:20,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 1511 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1903 Invalid, 0 Unknown, 382 Unchecked, 0.7s Time] [2022-07-22 10:33:20,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-07-22 10:33:20,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-07-22 10:33:20,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-22 10:33:20,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 207 transitions. [2022-07-22 10:33:20,553 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 207 transitions. Word has length 207 [2022-07-22 10:33:20,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:33:20,553 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 207 transitions. [2022-07-22 10:33:20,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 3.0172413793103448) internal successors, (350), 111 states have internal predecessors, (350), 49 states have call successors, (50), 1 states have call predecessors, (50), 2 states have return successors, (51), 51 states have call predecessors, (51), 49 states have call successors, (51) [2022-07-22 10:33:20,554 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 207 transitions. [2022-07-22 10:33:20,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-07-22 10:33:20,555 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:33:20,555 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:33:20,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2022-07-22 10:33:20,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:20,781 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:33:20,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:33:20,782 INFO L85 PathProgramCache]: Analyzing trace with hash -920417866, now seen corresponding path program 52 times [2022-07-22 10:33:20,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:33:20,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485806524] [2022-07-22 10:33:20,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:33:20,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:33:20,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:33:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:33:21,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:33:21,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:33:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:33:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:33:21,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:33:21,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:33:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:33:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:33:21,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:33:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:33:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:33:21,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:33:21,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:33:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:33:21,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:33:21,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-22 10:33:21,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-22 10:33:21,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:21,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 48 proven. 1007 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-22 10:33:21,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:21,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485806524] [2022-07-22 10:33:21,528 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485806524] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:21,528 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829960094] [2022-07-22 10:33:21,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 10:33:21,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:21,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:21,532 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:33:21,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2022-07-22 10:33:21,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 10:33:21,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:33:21,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 83 conjunts are in the unsatisfiable core [2022-07-22 10:33:21,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:22,696 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 [2022-07-22 10:33:22,825 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:33:22,825 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:33:22,962 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:33:22,963 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:33:23,594 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:33:23,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 175 proven. 1004 refuted. 0 times theorem prover too weak. 458 trivial. 0 not checked. [2022-07-22 10:33:23,634 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:23,909 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:33:23,911 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 37 treesize of output 33 [2022-07-22 10:33:24,222 INFO L134 CoverageAnalysis]: Checked inductivity of 1637 backedges. 48 proven. 1006 refuted. 0 times theorem prover too weak. 583 trivial. 0 not checked. [2022-07-22 10:33:24,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829960094] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:24,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:24,223 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 77 [2022-07-22 10:33:24,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045048454] [2022-07-22 10:33:24,223 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:24,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-07-22 10:33:24,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:24,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-07-22 10:33:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=5558, Unknown=0, NotChecked=0, Total=5852 [2022-07-22 10:33:24,225 INFO L87 Difference]: Start difference. First operand 204 states and 207 transitions. Second operand has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) [2022-07-22 10:33:26,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:33:26,475 INFO L93 Difference]: Finished difference Result 218 states and 221 transitions. [2022-07-22 10:33:26,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-07-22 10:33:26,476 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) Word has length 211 [2022-07-22 10:33:26,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:33:26,476 INFO L225 Difference]: With dead ends: 218 [2022-07-22 10:33:26,476 INFO L226 Difference]: Without dead ends: 216 [2022-07-22 10:33:26,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 525 GetRequests, 413 SyntacticMatches, 13 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3286 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=492, Invalid=9608, Unknown=0, NotChecked=0, Total=10100 [2022-07-22 10:33:26,477 INFO L413 NwaCegarLoop]: 65 mSDtfsCounter, 181 mSDsluCounter, 2294 mSDsCounter, 0 mSdLazyCounter, 4362 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 2359 SdHoareTripleChecker+Invalid, 4633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 4362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 103 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 10:33:26,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [182 Valid, 2359 Invalid, 4633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 4362 Invalid, 0 Unknown, 103 Unchecked, 1.8s Time] [2022-07-22 10:33:26,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-22 10:33:26,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2022-07-22 10:33:26,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 171 states have (on average 1.0116959064327486) internal successors, (173), 171 states have internal predecessors, (173), 19 states have call successors, (19), 17 states have call predecessors, (19), 17 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-07-22 10:33:26,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 211 transitions. [2022-07-22 10:33:26,549 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 211 transitions. Word has length 211 [2022-07-22 10:33:26,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:33:26,549 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 211 transitions. [2022-07-22 10:33:26,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.116883116883117) internal successors, (240), 73 states have internal predecessors, (240), 34 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 36 states have call predecessors, (37), 34 states have call successors, (37) [2022-07-22 10:33:26,549 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 211 transitions. [2022-07-22 10:33:26,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-07-22 10:33:26,550 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:33:26,551 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:33:26,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2022-07-22 10:33:26,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:26,772 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:33:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:33:26,772 INFO L85 PathProgramCache]: Analyzing trace with hash 488504236, now seen corresponding path program 53 times [2022-07-22 10:33:26,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:33:26,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6290731] [2022-07-22 10:33:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:33:26,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:33:26,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:33:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:33:27,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:33:27,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:33:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:33:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:33:27,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:33:27,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:33:27,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:33:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:33:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:33:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:33:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:33:27,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:33:27,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:33:27,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:33:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:33:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-22 10:33:27,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-22 10:33:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:27,506 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 51 proven. 1062 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-22 10:33:27,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:27,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6290731] [2022-07-22 10:33:27,507 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6290731] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:27,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973807141] [2022-07-22 10:33:27,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 10:33:27,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:27,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:27,509 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:33:27,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2022-07-22 10:33:27,803 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2022-07-22 10:33:27,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:33:27,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 84 conjunts are in the unsatisfiable core [2022-07-22 10:33:27,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:28,686 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 [2022-07-22 10:33:30,931 INFO L356 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2022-07-22 10:33:30,931 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 26 [2022-07-22 10:33:31,646 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:33:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 117 proven. 1062 refuted. 0 times theorem prover too weak. 516 trivial. 0 not checked. [2022-07-22 10:33:31,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:31,930 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:33:31,932 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 37 treesize of output 33 [2022-07-22 10:33:32,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1695 backedges. 51 proven. 1062 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-22 10:33:32,246 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973807141] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:32,246 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:32,246 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 80 [2022-07-22 10:33:32,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774051124] [2022-07-22 10:33:32,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:32,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-07-22 10:33:32,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:32,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-07-22 10:33:32,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=6016, Unknown=1, NotChecked=0, Total=6320 [2022-07-22 10:33:32,248 INFO L87 Difference]: Start difference. First operand 208 states and 211 transitions. Second operand has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) [2022-07-22 10:33:34,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:33:34,617 INFO L93 Difference]: Finished difference Result 295 states and 299 transitions. [2022-07-22 10:33:34,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-07-22 10:33:34,618 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) Word has length 215 [2022-07-22 10:33:34,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:33:34,618 INFO L225 Difference]: With dead ends: 295 [2022-07-22 10:33:34,618 INFO L226 Difference]: Without dead ends: 293 [2022-07-22 10:33:34,619 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 422 SyntacticMatches, 9 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3333 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=534, Invalid=10385, Unknown=1, NotChecked=0, Total=10920 [2022-07-22 10:33:34,619 INFO L413 NwaCegarLoop]: 62 mSDtfsCounter, 131 mSDsluCounter, 2773 mSDsCounter, 0 mSdLazyCounter, 5126 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 2835 SdHoareTripleChecker+Invalid, 5360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 5126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 123 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-07-22 10:33:34,620 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [132 Valid, 2835 Invalid, 5360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 5126 Invalid, 0 Unknown, 123 Unchecked, 1.8s Time] [2022-07-22 10:33:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-07-22 10:33:34,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 221. [2022-07-22 10:33:34,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 182 states have (on average 1.0164835164835164) internal successors, (185), 182 states have internal predecessors, (185), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-22 10:33:34,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2022-07-22 10:33:34,690 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 215 [2022-07-22 10:33:34,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:33:34,690 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2022-07-22 10:33:34,690 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.1125) internal successors, (249), 76 states have internal predecessors, (249), 35 states have call successors, (36), 2 states have call predecessors, (36), 3 states have return successors, (37), 37 states have call predecessors, (37), 35 states have call successors, (37) [2022-07-22 10:33:34,690 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2022-07-22 10:33:34,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-07-22 10:33:34,691 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:33:34,692 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 17, 17, 17, 17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:33:34,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2022-07-22 10:33:34,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:34,907 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:33:34,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:33:34,908 INFO L85 PathProgramCache]: Analyzing trace with hash 704807586, now seen corresponding path program 54 times [2022-07-22 10:33:34,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:33:34,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249258817] [2022-07-22 10:33:34,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:33:34,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:33:34,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:33:35,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:33:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:33:35,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:33:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:33:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:33:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:33:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:33:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:33:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:33:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:33:35,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:33:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:33:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:33:35,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:33:35,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:33:35,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:33:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-22 10:33:35,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-22 10:33:35,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:35,648 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 54 proven. 1121 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-22 10:33:35,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249258817] [2022-07-22 10:33:35,649 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249258817] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:35,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290308429] [2022-07-22 10:33:35,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 10:33:35,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:35,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:35,652 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:33:35,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2022-07-22 10:33:36,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2022-07-22 10:33:36,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 10:33:36,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 590 conjuncts, 54 conjunts are in the unsatisfiable core [2022-07-22 10:33:36,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:37,497 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 [2022-07-22 10:33:38,844 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-22 10:33:38,844 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 25 treesize of output 12 [2022-07-22 10:33:38,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 550 proven. 625 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-22 10:33:38,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:40,439 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 18 [2022-07-22 10:33:40,442 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 42 treesize of output 36 [2022-07-22 10:33:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1757 backedges. 534 proven. 641 refuted. 0 times theorem prover too weak. 582 trivial. 0 not checked. [2022-07-22 10:33:41,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290308429] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 10:33:41,808 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 10:33:41,808 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 122 [2022-07-22 10:33:41,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187100389] [2022-07-22 10:33:41,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 10:33:41,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-07-22 10:33:41,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 10:33:41,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-07-22 10:33:41,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1510, Invalid=13252, Unknown=0, NotChecked=0, Total=14762 [2022-07-22 10:33:41,811 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) [2022-07-22 10:33:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 10:33:46,878 INFO L93 Difference]: Finished difference Result 288 states and 292 transitions. [2022-07-22 10:33:46,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-07-22 10:33:46,878 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) Word has length 219 [2022-07-22 10:33:46,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 10:33:46,879 INFO L225 Difference]: With dead ends: 288 [2022-07-22 10:33:46,879 INFO L226 Difference]: Without dead ends: 216 [2022-07-22 10:33:46,881 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 638 GetRequests, 429 SyntacticMatches, 1 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12261 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=3939, Invalid=39951, Unknown=0, NotChecked=0, Total=43890 [2022-07-22 10:33:46,881 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 64 mSDsluCounter, 2279 mSDsCounter, 0 mSdLazyCounter, 2345 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 2339 SdHoareTripleChecker+Invalid, 2660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 226 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 10:33:46,882 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 2339 Invalid, 2660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2345 Invalid, 0 Unknown, 226 Unchecked, 0.9s Time] [2022-07-22 10:33:46,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-07-22 10:33:46,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-07-22 10:33:46,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 177 states have (on average 1.0112994350282485) internal successors, (179), 177 states have internal predecessors, (179), 20 states have call successors, (20), 18 states have call predecessors, (20), 18 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2022-07-22 10:33:46,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 219 transitions. [2022-07-22 10:33:46,942 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 219 transitions. Word has length 219 [2022-07-22 10:33:46,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 10:33:46,943 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 219 transitions. [2022-07-22 10:33:46,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 3.040983606557377) internal successors, (371), 117 states have internal predecessors, (371), 52 states have call successors, (53), 1 states have call predecessors, (53), 2 states have return successors, (54), 54 states have call predecessors, (54), 52 states have call successors, (54) [2022-07-22 10:33:46,943 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 219 transitions. [2022-07-22 10:33:46,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-07-22 10:33:46,944 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 10:33:46,944 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 18, 18, 18, 18, 18, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 10:33:46,964 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2022-07-22 10:33:47,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2022-07-22 10:33:47,149 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 10:33:47,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 10:33:47,150 INFO L85 PathProgramCache]: Analyzing trace with hash 762479087, now seen corresponding path program 55 times [2022-07-22 10:33:47,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 10:33:47,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58855471] [2022-07-22 10:33:47,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 10:33:47,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 10:33:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-07-22 10:33:47,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2022-07-22 10:33:47,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2022-07-22 10:33:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-07-22 10:33:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-07-22 10:33:47,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2022-07-22 10:33:47,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2022-07-22 10:33:47,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2022-07-22 10:33:47,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2022-07-22 10:33:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2022-07-22 10:33:47,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-07-22 10:33:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2022-07-22 10:33:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2022-07-22 10:33:47,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2022-07-22 10:33:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-07-22 10:33:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2022-07-22 10:33:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2022-07-22 10:33:47,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2022-07-22 10:33:47,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-07-22 10:33:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2022-07-22 10:33:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:47,909 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 51 proven. 1137 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2022-07-22 10:33:47,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 10:33:47,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58855471] [2022-07-22 10:33:47,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58855471] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 10:33:47,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962645554] [2022-07-22 10:33:47,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 10:33:47,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 10:33:47,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 10:33:47,911 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-22 10:33:47,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2022-07-22 10:33:48,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 10:33:48,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 599 conjuncts, 87 conjunts are in the unsatisfiable core [2022-07-22 10:33:48,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 10:33:49,006 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 [2022-07-22 10:33:49,115 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:33:49,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:33:49,251 INFO L356 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2022-07-22 10:33:49,251 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 24 [2022-07-22 10:33:49,942 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 23 treesize of output 7 [2022-07-22 10:33:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 1840 backedges. 186 proven. 1134 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2022-07-22 10:33:49,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 10:33:50,274 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 21 treesize of output 19 [2022-07-22 10:33:50,276 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 37 treesize of output 33