./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pr5.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-tiling/pr5.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 374c198ea90130277bd1a124bc94571dd240bc0803e6f3936a68065c719ddd5a --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 09:50:22,769 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 09:50:22,770 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 09:50:22,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 09:50:22,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 09:50:22,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 09:50:22,807 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 09:50:22,809 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 09:50:22,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 09:50:22,814 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 09:50:22,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 09:50:22,816 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 09:50:22,816 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 09:50:22,817 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 09:50:22,818 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 09:50:22,819 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 09:50:22,820 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 09:50:22,822 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 09:50:22,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 09:50:22,828 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 09:50:22,829 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 09:50:22,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 09:50:22,830 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 09:50:22,831 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 09:50:22,831 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 09:50:22,833 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 09:50:22,834 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 09:50:22,835 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 09:50:22,835 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 09:50:22,836 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 09:50:22,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 09:50:22,837 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 09:50:22,838 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 09:50:22,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 09:50:22,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 09:50:22,839 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 09:50:22,839 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 09:50:22,840 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 09:50:22,840 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 09:50:22,840 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 09:50:22,841 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 09:50:22,842 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 09:50:22,843 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 09:50:22,860 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 09:50:22,862 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 09:50:22,863 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 09:50:22,863 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 09:50:22,863 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 09:50:22,863 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 09:50:22,864 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 09:50:22,864 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 09:50:22,864 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 09:50:22,865 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 09:50:22,865 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 09:50:22,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 09:50:22,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 09:50:22,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 09:50:22,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 09:50:22,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 09:50:22,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 09:50:22,866 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 09:50:22,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 09:50:22,866 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 09:50:22,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 09:50:22,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 09:50:22,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 09:50:22,867 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 09:50:22,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:50:22,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 09:50:22,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 09:50:22,868 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 09:50:22,868 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 09:50:22,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 09:50:22,868 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 09:50:22,868 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 09:50:22,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 09:50:22,868 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 374c198ea90130277bd1a124bc94571dd240bc0803e6f3936a68065c719ddd5a [2022-07-22 09:50:23,060 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 09:50:23,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 09:50:23,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 09:50:23,080 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 09:50:23,080 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 09:50:23,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr5.c [2022-07-22 09:50:23,127 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62f47b22d/008d9c0d032649319067fbfe19caa5e9/FLAG0b3c1e2d2 [2022-07-22 09:50:23,491 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 09:50:23,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr5.c [2022-07-22 09:50:23,497 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62f47b22d/008d9c0d032649319067fbfe19caa5e9/FLAG0b3c1e2d2 [2022-07-22 09:50:23,511 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/62f47b22d/008d9c0d032649319067fbfe19caa5e9 [2022-07-22 09:50:23,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 09:50:23,514 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 09:50:23,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 09:50:23,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 09:50:23,517 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 09:50:23,518 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e522999 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23, skipping insertion in model container [2022-07-22 09:50:23,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,523 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 09:50:23,537 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 09:50:23,673 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-tiling/pr5.c[394,407] [2022-07-22 09:50:23,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:50:23,715 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 09:50:23,727 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-tiling/pr5.c[394,407] [2022-07-22 09:50:23,749 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 09:50:23,758 INFO L208 MainTranslator]: Completed translation [2022-07-22 09:50:23,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23 WrapperNode [2022-07-22 09:50:23,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 09:50:23,760 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 09:50:23,760 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 09:50:23,760 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 09:50:23,764 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,796 INFO L137 Inliner]: procedures = 15, calls = 30, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 87 [2022-07-22 09:50:23,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 09:50:23,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 09:50:23,798 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 09:50:23,798 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 09:50:23,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,809 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,810 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,822 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,830 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 09:50:23,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 09:50:23,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 09:50:23,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 09:50:23,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (1/1) ... [2022-07-22 09:50:23,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 09:50:23,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:23,855 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 09:50:23,861 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 09:50:23,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 09:50:23,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 09:50:23,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-22 09:50:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-22 09:50:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 09:50:23,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 09:50:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-22 09:50:23,881 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-22 09:50:23,929 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 09:50:23,931 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 09:50:24,069 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 09:50:24,088 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 09:50:24,089 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-22 09:50:24,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:50:24 BoogieIcfgContainer [2022-07-22 09:50:24,090 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 09:50:24,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 09:50:24,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 09:50:24,093 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 09:50:24,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 09:50:23" (1/3) ... [2022-07-22 09:50:24,094 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154e0052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:50:24, skipping insertion in model container [2022-07-22 09:50:24,094 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 09:50:23" (2/3) ... [2022-07-22 09:50:24,095 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@154e0052 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 09:50:24, skipping insertion in model container [2022-07-22 09:50:24,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 09:50:24" (3/3) ... [2022-07-22 09:50:24,095 INFO L111 eAbstractionObserver]: Analyzing ICFG pr5.c [2022-07-22 09:50:24,104 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 09:50:24,104 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 09:50:24,131 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 09:50:24,135 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@500e6053, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@777b8e62 [2022-07-22 09:50:24,135 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 09:50:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 09:50:24,152 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:24,153 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:24,153 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:24,157 INFO L85 PathProgramCache]: Analyzing trace with hash -50963655, now seen corresponding path program 1 times [2022-07-22 09:50:24,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:24,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325229968] [2022-07-22 09:50:24,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:24,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:24,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:24,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325229968] [2022-07-22 09:50:24,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325229968] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:50:24,279 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:50:24,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 09:50:24,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365604520] [2022-07-22 09:50:24,280 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:50:24,283 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 09:50:24,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:24,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 09:50:24,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 09:50:24,301 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.6) internal successors, (40), 26 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:24,313 INFO L93 Difference]: Finished difference Result 49 states and 72 transitions. [2022-07-22 09:50:24,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 09:50:24,315 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 09:50:24,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:24,320 INFO L225 Difference]: With dead ends: 49 [2022-07-22 09:50:24,320 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 09:50:24,322 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 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 09:50:24,326 INFO L413 NwaCegarLoop]: 36 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, 36 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 09:50:24,327 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:50:24,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 09:50:24,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-07-22 09:50:24,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.380952380952381) internal successors, (29), 21 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2022-07-22 09:50:24,347 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 13 [2022-07-22 09:50:24,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:24,347 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2022-07-22 09:50:24,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,348 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2022-07-22 09:50:24,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 09:50:24,349 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:24,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:24,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 09:50:24,350 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:24,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:24,353 INFO L85 PathProgramCache]: Analyzing trace with hash 629094715, now seen corresponding path program 1 times [2022-07-22 09:50:24,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:24,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502149535] [2022-07-22 09:50:24,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:24,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:24,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:24,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:24,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:24,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502149535] [2022-07-22 09:50:24,450 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502149535] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:50:24,450 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:50:24,450 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:50:24,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119332979] [2022-07-22 09:50:24,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:50:24,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:50:24,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:24,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:50:24,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:50:24,454 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:24,479 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2022-07-22 09:50:24,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 09:50:24,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 09:50:24,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:24,480 INFO L225 Difference]: With dead ends: 31 [2022-07-22 09:50:24,480 INFO L226 Difference]: Without dead ends: 29 [2022-07-22 09:50:24,481 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 09:50:24,481 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:24,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:50:24,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-07-22 09:50:24,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2022-07-22 09:50:24,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 23 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2022-07-22 09:50:24,485 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 13 [2022-07-22 09:50:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:24,485 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2022-07-22 09:50:24,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,486 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2022-07-22 09:50:24,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-22 09:50:24,486 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:24,486 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:24,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 09:50:24,487 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:24,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:24,487 INFO L85 PathProgramCache]: Analyzing trace with hash 629154297, now seen corresponding path program 1 times [2022-07-22 09:50:24,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:24,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218448597] [2022-07-22 09:50:24,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:24,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:24,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:24,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:24,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218448597] [2022-07-22 09:50:24,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218448597] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:50:24,590 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:50:24,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-22 09:50:24,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683663714] [2022-07-22 09:50:24,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:50:24,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-22 09:50:24,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:24,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-22 09:50:24,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:50:24,592 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:24,639 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-07-22 09:50:24,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-22 09:50:24,640 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-22 09:50:24,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:24,642 INFO L225 Difference]: With dead ends: 42 [2022-07-22 09:50:24,642 INFO L226 Difference]: Without dead ends: 31 [2022-07-22 09:50:24,642 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:50:24,643 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 72 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:24,643 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 21 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:50:24,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-07-22 09:50:24,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-07-22 09:50:24,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-07-22 09:50:24,646 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 13 [2022-07-22 09:50:24,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:24,646 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-07-22 09:50:24,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-07-22 09:50:24,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 09:50:24,647 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:24,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:24,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 09:50:24,647 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:24,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash 314139906, now seen corresponding path program 1 times [2022-07-22 09:50:24,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:24,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871147135] [2022-07-22 09:50:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:24,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:24,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:24,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:24,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871147135] [2022-07-22 09:50:24,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871147135] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:50:24,714 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:50:24,714 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:50:24,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003345068] [2022-07-22 09:50:24,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:50:24,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:50:24,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:24,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:50:24,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:50:24,716 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:24,763 INFO L93 Difference]: Finished difference Result 61 states and 82 transitions. [2022-07-22 09:50:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:50:24,764 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-22 09:50:24,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:24,766 INFO L225 Difference]: With dead ends: 61 [2022-07-22 09:50:24,766 INFO L226 Difference]: Without dead ends: 43 [2022-07-22 09:50:24,766 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:50:24,770 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:24,773 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 42 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:50:24,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-07-22 09:50:24,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 32. [2022-07-22 09:50:24,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.3870967741935485) internal successors, (43), 31 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 43 transitions. [2022-07-22 09:50:24,782 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 43 transitions. Word has length 20 [2022-07-22 09:50:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:24,782 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 43 transitions. [2022-07-22 09:50:24,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,783 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 43 transitions. [2022-07-22 09:50:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 09:50:24,783 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:24,784 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:24,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 09:50:24,784 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:24,785 INFO L85 PathProgramCache]: Analyzing trace with hash 994198276, now seen corresponding path program 1 times [2022-07-22 09:50:24,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:24,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822437321] [2022-07-22 09:50:24,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:24,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:24,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:24,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:24,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822437321] [2022-07-22 09:50:24,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822437321] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:50:24,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:50:24,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:50:24,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088676059] [2022-07-22 09:50:24,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:50:24,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:50:24,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:24,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:50:24,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:50:24,859 INFO L87 Difference]: Start difference. First operand 32 states and 43 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:24,898 INFO L93 Difference]: Finished difference Result 78 states and 109 transitions. [2022-07-22 09:50:24,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:50:24,899 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-22 09:50:24,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:24,900 INFO L225 Difference]: With dead ends: 78 [2022-07-22 09:50:24,900 INFO L226 Difference]: Without dead ends: 50 [2022-07-22 09:50:24,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:50:24,902 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 59 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:24,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 36 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:50:24,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-22 09:50:24,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 39. [2022-07-22 09:50:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 53 transitions. [2022-07-22 09:50:24,913 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 53 transitions. Word has length 20 [2022-07-22 09:50:24,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:24,913 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 53 transitions. [2022-07-22 09:50:24,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:24,914 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 53 transitions. [2022-07-22 09:50:24,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 09:50:24,915 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:24,915 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:24,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 09:50:24,918 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:24,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:24,919 INFO L85 PathProgramCache]: Analyzing trace with hash 707166916, now seen corresponding path program 1 times [2022-07-22 09:50:24,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:24,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017196230] [2022-07-22 09:50:24,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:24,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:25,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:25,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:25,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017196230] [2022-07-22 09:50:25,131 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2017196230] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:25,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315184790] [2022-07-22 09:50:25,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:25,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:25,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:25,138 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 09:50:25,139 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 09:50:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:25,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 09:50:25,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:25,317 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 16 treesize of output 12 [2022-07-22 09:50:25,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:25,345 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:25,372 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:25,373 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:25,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:25,385 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:25,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:25,395 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 09:50:25,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:25,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:25,614 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 21 [2022-07-22 09:50:25,618 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 168 treesize of output 164 [2022-07-22 09:50:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:25,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315184790] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:25,693 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:25,693 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 21 [2022-07-22 09:50:25,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694849412] [2022-07-22 09:50:25,693 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:25,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-22 09:50:25,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:25,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-22 09:50:25,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=353, Unknown=0, NotChecked=0, Total=420 [2022-07-22 09:50:25,695 INFO L87 Difference]: Start difference. First operand 39 states and 53 transitions. Second operand has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:26,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:26,192 INFO L93 Difference]: Finished difference Result 144 states and 189 transitions. [2022-07-22 09:50:26,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-22 09:50:26,192 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-22 09:50:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:26,193 INFO L225 Difference]: With dead ends: 144 [2022-07-22 09:50:26,193 INFO L226 Difference]: Without dead ends: 126 [2022-07-22 09:50:26,193 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=982, Unknown=0, NotChecked=0, Total=1260 [2022-07-22 09:50:26,194 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 264 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 47 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:26,194 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [264 Valid, 143 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 323 Invalid, 0 Unknown, 47 Unchecked, 0.2s Time] [2022-07-22 09:50:26,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-22 09:50:26,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 61. [2022-07-22 09:50:26,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 86 transitions. [2022-07-22 09:50:26,200 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 86 transitions. Word has length 20 [2022-07-22 09:50:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:26,201 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 86 transitions. [2022-07-22 09:50:26,201 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.380952380952381) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 86 transitions. [2022-07-22 09:50:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-22 09:50:26,201 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:26,202 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:26,221 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 09:50:26,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-22 09:50:26,418 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:26,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:26,419 INFO L85 PathProgramCache]: Analyzing trace with hash 407392262, now seen corresponding path program 1 times [2022-07-22 09:50:26,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:26,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326589227] [2022-07-22 09:50:26,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:26,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:26,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:26,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:26,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:26,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326589227] [2022-07-22 09:50:26,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326589227] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:26,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666939323] [2022-07-22 09:50:26,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:26,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:26,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:26,546 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 09:50:26,547 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 09:50:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:26,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-22 09:50:26,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:26,608 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 16 treesize of output 12 [2022-07-22 09:50:26,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:26,622 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:26,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:26,634 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:26,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:26,642 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:26,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:26,659 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2022-07-22 09:50:26,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:26,689 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:26,787 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 15 treesize of output 13 [2022-07-22 09:50:26,788 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 24 treesize of output 22 [2022-07-22 09:50:26,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:26,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666939323] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:26,799 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:26,799 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 13 [2022-07-22 09:50:26,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653678696] [2022-07-22 09:50:26,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:26,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-07-22 09:50:26,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:26,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-07-22 09:50:26,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-07-22 09:50:26,801 INFO L87 Difference]: Start difference. First operand 61 states and 86 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:27,108 INFO L93 Difference]: Finished difference Result 130 states and 170 transitions. [2022-07-22 09:50:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-22 09:50:27,109 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-22 09:50:27,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:27,110 INFO L225 Difference]: With dead ends: 130 [2022-07-22 09:50:27,110 INFO L226 Difference]: Without dead ends: 128 [2022-07-22 09:50:27,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 8 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2022-07-22 09:50:27,111 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 123 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 340 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:27,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 116 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 340 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:50:27,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-07-22 09:50:27,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 64. [2022-07-22 09:50:27,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 63 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:27,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 90 transitions. [2022-07-22 09:50:27,117 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 90 transitions. Word has length 20 [2022-07-22 09:50:27,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:27,117 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 90 transitions. [2022-07-22 09:50:27,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 90 transitions. [2022-07-22 09:50:27,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 09:50:27,118 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:27,118 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:27,142 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 09:50:27,327 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,SelfDestructingSolverStorable6 [2022-07-22 09:50:27,327 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:27,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:27,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1616202537, now seen corresponding path program 1 times [2022-07-22 09:50:27,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:27,328 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040555007] [2022-07-22 09:50:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:27,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:27,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:27,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:27,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040555007] [2022-07-22 09:50:27,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040555007] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:27,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416103592] [2022-07-22 09:50:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:27,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:27,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:27,521 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 09:50:27,522 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 09:50:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:27,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 09:50:27,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:27,607 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 16 treesize of output 12 [2022-07-22 09:50:27,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:27,628 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:27,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:27,638 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:27,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:27,645 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:50:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:27,752 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:27,874 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 25 treesize of output 23 [2022-07-22 09:50:27,876 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 88 treesize of output 84 [2022-07-22 09:50:27,926 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:27,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416103592] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:27,926 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:27,926 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2022-07-22 09:50:27,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842339410] [2022-07-22 09:50:27,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:27,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 09:50:27,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:27,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 09:50:27,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2022-07-22 09:50:27,928 INFO L87 Difference]: Start difference. First operand 64 states and 90 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:28,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:28,628 INFO L93 Difference]: Finished difference Result 361 states and 505 transitions. [2022-07-22 09:50:28,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-22 09:50:28,628 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-22 09:50:28,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:28,630 INFO L225 Difference]: With dead ends: 361 [2022-07-22 09:50:28,631 INFO L226 Difference]: Without dead ends: 314 [2022-07-22 09:50:28,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 38 SyntacticMatches, 5 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=1443, Unknown=0, NotChecked=0, Total=1806 [2022-07-22 09:50:28,632 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 316 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 439 mSolverCounterSat, 265 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 776 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 265 IncrementalHoareTripleChecker+Valid, 439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 72 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:28,632 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [316 Valid, 162 Invalid, 776 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [265 Valid, 439 Invalid, 0 Unknown, 72 Unchecked, 0.3s Time] [2022-07-22 09:50:28,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2022-07-22 09:50:28,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 135. [2022-07-22 09:50:28,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.4477611940298507) internal successors, (194), 134 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:28,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 194 transitions. [2022-07-22 09:50:28,642 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 194 transitions. Word has length 26 [2022-07-22 09:50:28,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:28,642 INFO L495 AbstractCegarLoop]: Abstraction has 135 states and 194 transitions. [2022-07-22 09:50:28,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:28,642 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 194 transitions. [2022-07-22 09:50:28,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 09:50:28,649 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:28,649 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:28,666 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 09:50:28,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:28,859 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:28,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:28,860 INFO L85 PathProgramCache]: Analyzing trace with hash 684620053, now seen corresponding path program 1 times [2022-07-22 09:50:28,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:28,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232472335] [2022-07-22 09:50:28,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:28,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:28,894 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:50:28,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:28,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232472335] [2022-07-22 09:50:28,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232472335] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:50:28,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:50:28,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:50:28,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420558738] [2022-07-22 09:50:28,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:50:28,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:50:28,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:28,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:50:28,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:50:28,896 INFO L87 Difference]: Start difference. First operand 135 states and 194 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:28,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:28,920 INFO L93 Difference]: Finished difference Result 192 states and 271 transitions. [2022-07-22 09:50:28,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:50:28,920 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-22 09:50:28,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:28,922 INFO L225 Difference]: With dead ends: 192 [2022-07-22 09:50:28,922 INFO L226 Difference]: Without dead ends: 140 [2022-07-22 09:50:28,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:50:28,924 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 41 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:28,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 52 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:50:28,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-07-22 09:50:28,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 125. [2022-07-22 09:50:28,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.3870967741935485) internal successors, (172), 124 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:28,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 172 transitions. [2022-07-22 09:50:28,938 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 172 transitions. Word has length 26 [2022-07-22 09:50:28,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:28,938 INFO L495 AbstractCegarLoop]: Abstraction has 125 states and 172 transitions. [2022-07-22 09:50:28,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:28,938 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 172 transitions. [2022-07-22 09:50:28,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 09:50:28,942 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:28,943 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:28,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-22 09:50:28,943 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:28,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:28,943 INFO L85 PathProgramCache]: Analyzing trace with hash -595243625, now seen corresponding path program 1 times [2022-07-22 09:50:28,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:28,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46299663] [2022-07-22 09:50:28,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:28,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:28,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:50:28,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:28,980 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46299663] [2022-07-22 09:50:28,980 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46299663] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:50:28,980 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:50:28,981 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:50:28,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57175733] [2022-07-22 09:50:28,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:50:28,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:50:28,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:50:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:50:28,982 INFO L87 Difference]: Start difference. First operand 125 states and 172 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:29,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:29,004 INFO L93 Difference]: Finished difference Result 154 states and 203 transitions. [2022-07-22 09:50:29,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:50:29,004 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-22 09:50:29,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:29,005 INFO L225 Difference]: With dead ends: 154 [2022-07-22 09:50:29,005 INFO L226 Difference]: Without dead ends: 125 [2022-07-22 09:50:29,005 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-07-22 09:50:29,006 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 56 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:29,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:50:29,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-07-22 09:50:29,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 109. [2022-07-22 09:50:29,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.3703703703703705) internal successors, (148), 108 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:29,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 148 transitions. [2022-07-22 09:50:29,016 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 148 transitions. Word has length 26 [2022-07-22 09:50:29,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:29,016 INFO L495 AbstractCegarLoop]: Abstraction has 109 states and 148 transitions. [2022-07-22 09:50:29,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:29,016 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 148 transitions. [2022-07-22 09:50:29,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-07-22 09:50:29,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:29,018 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:29,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-07-22 09:50:29,019 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:29,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:29,019 INFO L85 PathProgramCache]: Analyzing trace with hash 989711575, now seen corresponding path program 1 times [2022-07-22 09:50:29,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:29,020 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074345318] [2022-07-22 09:50:29,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:29,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:29,150 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:29,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:29,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074345318] [2022-07-22 09:50:29,151 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074345318] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:29,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251039741] [2022-07-22 09:50:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:29,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:29,152 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:29,153 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 09:50:29,154 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 09:50:29,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:29,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 24 conjunts are in the unsatisfiable core [2022-07-22 09:50:29,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:29,213 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 16 treesize of output 12 [2022-07-22 09:50:29,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:29,221 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:29,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:29,232 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:50:29,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:29,240 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 40 [2022-07-22 09:50:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:29,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:29,363 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 17 treesize of output 15 [2022-07-22 09:50:29,365 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 30 treesize of output 26 [2022-07-22 09:50:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:29,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251039741] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:29,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:29,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 14 [2022-07-22 09:50:29,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141863287] [2022-07-22 09:50:29,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:29,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-22 09:50:29,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:29,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-22 09:50:29,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-07-22 09:50:29,376 INFO L87 Difference]: Start difference. First operand 109 states and 148 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:29,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:29,831 INFO L93 Difference]: Finished difference Result 248 states and 321 transitions. [2022-07-22 09:50:29,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-22 09:50:29,831 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2022-07-22 09:50:29,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:29,832 INFO L225 Difference]: With dead ends: 248 [2022-07-22 09:50:29,832 INFO L226 Difference]: Without dead ends: 246 [2022-07-22 09:50:29,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 43 SyntacticMatches, 8 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2022-07-22 09:50:29,833 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 121 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 498 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 498 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:29,834 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 139 Invalid, 542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 498 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-07-22 09:50:29,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-22 09:50:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 130. [2022-07-22 09:50:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.3565891472868217) internal successors, (175), 129 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:29,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 175 transitions. [2022-07-22 09:50:29,840 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 175 transitions. Word has length 26 [2022-07-22 09:50:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:29,840 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 175 transitions. [2022-07-22 09:50:29,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 175 transitions. [2022-07-22 09:50:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-07-22 09:50:29,851 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:29,851 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:29,872 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 09:50:30,068 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:30,068 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:30,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:30,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1583768663, now seen corresponding path program 1 times [2022-07-22 09:50:30,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:30,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324236690] [2022-07-22 09:50:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:30,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:30,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:30,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:30,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324236690] [2022-07-22 09:50:30,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324236690] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:50:30,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:50:30,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:50:30,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936930685] [2022-07-22 09:50:30,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:50:30,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:50:30,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:30,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:50:30,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:50:30,086 INFO L87 Difference]: Start difference. First operand 130 states and 175 transitions. Second operand has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:30,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:30,104 INFO L93 Difference]: Finished difference Result 162 states and 209 transitions. [2022-07-22 09:50:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:50:30,105 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2022-07-22 09:50:30,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:30,106 INFO L225 Difference]: With dead ends: 162 [2022-07-22 09:50:30,106 INFO L226 Difference]: Without dead ends: 127 [2022-07-22 09:50:30,106 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:50:30,107 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:30,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:50:30,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-07-22 09:50:30,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 111. [2022-07-22 09:50:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3363636363636364) internal successors, (147), 110 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 147 transitions. [2022-07-22 09:50:30,112 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 147 transitions. Word has length 27 [2022-07-22 09:50:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:30,112 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 147 transitions. [2022-07-22 09:50:30,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.0) internal successors, (27), 3 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 147 transitions. [2022-07-22 09:50:30,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-22 09:50:30,113 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:30,113 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:30,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-07-22 09:50:30,113 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:30,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:30,114 INFO L85 PathProgramCache]: Analyzing trace with hash -958935894, now seen corresponding path program 2 times [2022-07-22 09:50:30,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:30,114 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991728194] [2022-07-22 09:50:30,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:30,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:30,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:30,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991728194] [2022-07-22 09:50:30,202 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991728194] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:30,202 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444682412] [2022-07-22 09:50:30,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:50:30,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:30,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:30,203 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 09:50:30,204 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 09:50:30,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:50:30,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:30,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-22 09:50:30,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:30,285 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 16 treesize of output 12 [2022-07-22 09:50:30,304 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:30,305 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 29 treesize of output 28 [2022-07-22 09:50:30,315 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:50:30,315 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 23 treesize of output 22 [2022-07-22 09:50:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:30,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:30,649 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 51 treesize of output 47 [2022-07-22 09:50:30,654 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 175 treesize of output 167 [2022-07-22 09:50:30,772 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:30,772 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444682412] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:30,772 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:30,772 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 12] total 28 [2022-07-22 09:50:30,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992823268] [2022-07-22 09:50:30,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:30,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 09:50:30,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:30,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 09:50:30,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2022-07-22 09:50:30,773 INFO L87 Difference]: Start difference. First operand 111 states and 147 transitions. Second operand has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:32,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:32,382 INFO L93 Difference]: Finished difference Result 451 states and 571 transitions. [2022-07-22 09:50:32,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-22 09:50:32,382 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-22 09:50:32,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:32,383 INFO L225 Difference]: With dead ends: 451 [2022-07-22 09:50:32,383 INFO L226 Difference]: Without dead ends: 415 [2022-07-22 09:50:32,384 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 47 SyntacticMatches, 9 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=884, Invalid=4518, Unknown=0, NotChecked=0, Total=5402 [2022-07-22 09:50:32,385 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 506 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1051 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:32,385 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 136 Invalid, 1051 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 546 Invalid, 0 Unknown, 76 Unchecked, 0.5s Time] [2022-07-22 09:50:32,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 415 states. [2022-07-22 09:50:32,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 415 to 163. [2022-07-22 09:50:32,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.2901234567901234) internal successors, (209), 162 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:32,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 209 transitions. [2022-07-22 09:50:32,394 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 209 transitions. Word has length 32 [2022-07-22 09:50:32,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:32,394 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 209 transitions. [2022-07-22 09:50:32,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.142857142857143) internal successors, (88), 28 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:32,395 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 209 transitions. [2022-07-22 09:50:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-07-22 09:50:32,395 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:32,395 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:32,412 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 09:50:32,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-07-22 09:50:32,611 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:32,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1605606378, now seen corresponding path program 1 times [2022-07-22 09:50:32,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:32,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870810800] [2022-07-22 09:50:32,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:32,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-22 09:50:32,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:32,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870810800] [2022-07-22 09:50:32,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870810800] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:50:32,639 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:50:32,639 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:50:32,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625120836] [2022-07-22 09:50:32,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:50:32,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:50:32,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:32,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:50:32,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:50:32,641 INFO L87 Difference]: Start difference. First operand 163 states and 209 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:32,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:32,659 INFO L93 Difference]: Finished difference Result 195 states and 245 transitions. [2022-07-22 09:50:32,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:50:32,660 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2022-07-22 09:50:32,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:32,661 INFO L225 Difference]: With dead ends: 195 [2022-07-22 09:50:32,661 INFO L226 Difference]: Without dead ends: 154 [2022-07-22 09:50:32,661 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:50:32,662 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:32,662 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 39 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:50:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2022-07-22 09:50:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 138. [2022-07-22 09:50:32,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.27007299270073) internal successors, (174), 137 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:32,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 174 transitions. [2022-07-22 09:50:32,672 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 174 transitions. Word has length 33 [2022-07-22 09:50:32,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:32,672 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 174 transitions. [2022-07-22 09:50:32,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:32,672 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 174 transitions. [2022-07-22 09:50:32,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 09:50:32,673 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:32,673 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:32,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-07-22 09:50:32,673 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:32,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:32,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1633319485, now seen corresponding path program 3 times [2022-07-22 09:50:32,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:32,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037498189] [2022-07-22 09:50:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:32,861 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:32,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:32,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037498189] [2022-07-22 09:50:32,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037498189] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:32,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019685062] [2022-07-22 09:50:32,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:50:32,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:32,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:32,864 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 09:50:32,865 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 09:50:32,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-22 09:50:32,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:32,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 25 conjunts are in the unsatisfiable core [2022-07-22 09:50:32,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:32,983 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 16 treesize of output 12 [2022-07-22 09:50:33,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:50:33,016 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2022-07-22 09:50:33,223 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:33,224 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:33,339 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 25 treesize of output 23 [2022-07-22 09:50:33,341 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 88 treesize of output 84 [2022-07-22 09:50:33,392 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:33,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019685062] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:33,392 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:33,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2022-07-22 09:50:33,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217403241] [2022-07-22 09:50:33,392 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:33,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 09:50:33,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:33,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 09:50:33,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:50:33,394 INFO L87 Difference]: Start difference. First operand 138 states and 174 transitions. Second operand has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:35,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:35,084 INFO L93 Difference]: Finished difference Result 505 states and 606 transitions. [2022-07-22 09:50:35,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-22 09:50:35,085 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-22 09:50:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:35,086 INFO L225 Difference]: With dead ends: 505 [2022-07-22 09:50:35,086 INFO L226 Difference]: Without dead ends: 495 [2022-07-22 09:50:35,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 58 SyntacticMatches, 13 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2059 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=986, Invalid=4866, Unknown=0, NotChecked=0, Total=5852 [2022-07-22 09:50:35,093 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 425 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 441 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 425 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 1509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 441 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 106 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:35,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [425 Valid, 279 Invalid, 1509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [441 Valid, 962 Invalid, 0 Unknown, 106 Unchecked, 0.6s Time] [2022-07-22 09:50:35,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2022-07-22 09:50:35,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 168. [2022-07-22 09:50:35,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.2455089820359282) internal successors, (208), 167 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2022-07-22 09:50:35,105 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 38 [2022-07-22 09:50:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:35,105 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2022-07-22 09:50:35,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.586206896551724) internal successors, (104), 29 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2022-07-22 09:50:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-07-22 09:50:35,106 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:35,106 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:35,122 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 09:50:35,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-07-22 09:50:35,307 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:35,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:35,307 INFO L85 PathProgramCache]: Analyzing trace with hash -546292993, now seen corresponding path program 1 times [2022-07-22 09:50:35,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:35,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415069192] [2022-07-22 09:50:35,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:35,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:35,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:35,418 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:35,419 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415069192] [2022-07-22 09:50:35,419 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415069192] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:35,419 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327647374] [2022-07-22 09:50:35,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:35,419 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:35,420 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:35,421 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 09:50:35,421 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 09:50:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:35,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 09:50:35,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:35,482 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 16 treesize of output 12 [2022-07-22 09:50:35,499 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:50:35,499 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 23 treesize of output 22 [2022-07-22 09:50:35,605 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:35,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:35,687 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 17 treesize of output 15 [2022-07-22 09:50:35,689 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 30 treesize of output 26 [2022-07-22 09:50:35,717 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:35,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327647374] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:35,718 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:35,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 22 [2022-07-22 09:50:35,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811640740] [2022-07-22 09:50:35,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:35,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:50:35,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:35,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:50:35,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=388, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:50:35,719 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:37,013 INFO L93 Difference]: Finished difference Result 552 states and 661 transitions. [2022-07-22 09:50:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-07-22 09:50:37,013 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2022-07-22 09:50:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:37,015 INFO L225 Difference]: With dead ends: 552 [2022-07-22 09:50:37,015 INFO L226 Difference]: Without dead ends: 550 [2022-07-22 09:50:37,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 62 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2273 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1053, Invalid=6087, Unknown=0, NotChecked=0, Total=7140 [2022-07-22 09:50:37,017 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 285 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1261 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 1512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:37,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [285 Valid, 252 Invalid, 1512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-07-22 09:50:37,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 550 states. [2022-07-22 09:50:37,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 550 to 200. [2022-07-22 09:50:37,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.2462311557788945) internal successors, (248), 199 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:37,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2022-07-22 09:50:37,030 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 38 [2022-07-22 09:50:37,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:37,030 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2022-07-22 09:50:37,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 4.363636363636363) internal successors, (96), 22 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:37,031 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2022-07-22 09:50:37,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 09:50:37,031 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:37,031 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:37,052 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 09:50:37,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:37,248 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:37,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:37,248 INFO L85 PathProgramCache]: Analyzing trace with hash -2003079792, now seen corresponding path program 4 times [2022-07-22 09:50:37,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:37,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343100011] [2022-07-22 09:50:37,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:37,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:37,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:37,349 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:37,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:37,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343100011] [2022-07-22 09:50:37,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343100011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:37,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548010656] [2022-07-22 09:50:37,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:50:37,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:37,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:37,351 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 09:50:37,352 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 09:50:37,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:50:37,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:37,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-22 09:50:37,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:37,433 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 09:50:37,621 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:37,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:37,759 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 17 treesize of output 15 [2022-07-22 09:50:37,760 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 30 treesize of output 26 [2022-07-22 09:50:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:37,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548010656] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:37,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:37,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 12] total 27 [2022-07-22 09:50:37,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387595708] [2022-07-22 09:50:37,779 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:37,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-07-22 09:50:37,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:37,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-07-22 09:50:37,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2022-07-22 09:50:37,780 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:39,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:39,339 INFO L93 Difference]: Finished difference Result 648 states and 768 transitions. [2022-07-22 09:50:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-07-22 09:50:39,340 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-22 09:50:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:39,341 INFO L225 Difference]: With dead ends: 648 [2022-07-22 09:50:39,341 INFO L226 Difference]: Without dead ends: 638 [2022-07-22 09:50:39,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1018, Invalid=6464, Unknown=0, NotChecked=0, Total=7482 [2022-07-22 09:50:39,343 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 395 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 1031 mSolverCounterSat, 463 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 463 IncrementalHoareTripleChecker+Valid, 1031 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:39,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 235 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [463 Valid, 1031 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-22 09:50:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2022-07-22 09:50:39,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 224. [2022-07-22 09:50:39,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.2286995515695067) internal successors, (274), 223 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:39,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 274 transitions. [2022-07-22 09:50:39,360 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 274 transitions. Word has length 44 [2022-07-22 09:50:39,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:39,360 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 274 transitions. [2022-07-22 09:50:39,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.0) internal successors, (108), 27 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:39,361 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 274 transitions. [2022-07-22 09:50:39,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-07-22 09:50:39,361 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:39,361 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:39,380 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 09:50:39,580 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,SelfDestructingSolverStorable16 [2022-07-22 09:50:39,580 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:39,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:39,581 INFO L85 PathProgramCache]: Analyzing trace with hash -2075466350, now seen corresponding path program 1 times [2022-07-22 09:50:39,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:39,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353039712] [2022-07-22 09:50:39,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:39,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:39,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:39,659 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:39,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:39,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353039712] [2022-07-22 09:50:39,660 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353039712] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:39,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872094354] [2022-07-22 09:50:39,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:39,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:39,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:39,661 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 09:50:39,662 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 09:50:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:39,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-22 09:50:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:39,729 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 09:50:39,858 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:39,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:39,913 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 17 treesize of output 15 [2022-07-22 09:50:39,915 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 30 treesize of output 26 [2022-07-22 09:50:39,922 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:39,922 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872094354] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:39,922 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:39,922 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 17 [2022-07-22 09:50:39,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427251293] [2022-07-22 09:50:39,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:39,923 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-07-22 09:50:39,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:39,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-07-22 09:50:39,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2022-07-22 09:50:39,923 INFO L87 Difference]: Start difference. First operand 224 states and 274 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:41,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:41,947 INFO L93 Difference]: Finished difference Result 928 states and 1112 transitions. [2022-07-22 09:50:41,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-07-22 09:50:41,947 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2022-07-22 09:50:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:41,949 INFO L225 Difference]: With dead ends: 928 [2022-07-22 09:50:41,950 INFO L226 Difference]: Without dead ends: 926 [2022-07-22 09:50:41,952 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 79 SyntacticMatches, 4 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5385 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1389, Invalid=12653, Unknown=0, NotChecked=0, Total=14042 [2022-07-22 09:50:41,953 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 212 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 2444 mSolverCounterSat, 258 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 258 IncrementalHoareTripleChecker+Valid, 2444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:41,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [212 Valid, 417 Invalid, 2702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [258 Valid, 2444 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-07-22 09:50:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2022-07-22 09:50:41,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 340. [2022-07-22 09:50:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 1.2625368731563422) internal successors, (428), 339 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:41,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 428 transitions. [2022-07-22 09:50:41,984 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 428 transitions. Word has length 44 [2022-07-22 09:50:41,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:41,984 INFO L495 AbstractCegarLoop]: Abstraction has 340 states and 428 transitions. [2022-07-22 09:50:41,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:41,985 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 428 transitions. [2022-07-22 09:50:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-07-22 09:50:41,985 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:41,985 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:42,004 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 09:50:42,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-07-22 09:50:42,199 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:42,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:42,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1961854480, now seen corresponding path program 1 times [2022-07-22 09:50:42,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:42,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688137026] [2022-07-22 09:50:42,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:42,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:42,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:42,229 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-07-22 09:50:42,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:42,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688137026] [2022-07-22 09:50:42,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688137026] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:50:42,229 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:50:42,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:50:42,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355347194] [2022-07-22 09:50:42,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:50:42,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:50:42,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:42,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:50:42,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:50:42,232 INFO L87 Difference]: Start difference. First operand 340 states and 428 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:42,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:42,270 INFO L93 Difference]: Finished difference Result 380 states and 473 transitions. [2022-07-22 09:50:42,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:50:42,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2022-07-22 09:50:42,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:42,272 INFO L225 Difference]: With dead ends: 380 [2022-07-22 09:50:42,272 INFO L226 Difference]: Without dead ends: 302 [2022-07-22 09:50:42,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:50:42,274 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:42,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 44 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:50:42,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-07-22 09:50:42,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 286. [2022-07-22 09:50:42,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.249122807017544) internal successors, (356), 285 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:42,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 356 transitions. [2022-07-22 09:50:42,295 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 356 transitions. Word has length 45 [2022-07-22 09:50:42,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:42,295 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 356 transitions. [2022-07-22 09:50:42,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:42,295 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 356 transitions. [2022-07-22 09:50:42,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-07-22 09:50:42,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:42,296 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:42,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-07-22 09:50:42,296 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:42,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:42,297 INFO L85 PathProgramCache]: Analyzing trace with hash -255895901, now seen corresponding path program 5 times [2022-07-22 09:50:42,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:42,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910965210] [2022-07-22 09:50:42,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:42,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:42,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:42,480 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:42,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:42,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910965210] [2022-07-22 09:50:42,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910965210] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:42,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414706192] [2022-07-22 09:50:42,481 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:50:42,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:42,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:42,483 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 09:50:42,486 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 09:50:42,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-22 09:50:42,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:42,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 12 conjunts are in the unsatisfiable core [2022-07-22 09:50:42,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:42,890 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:42,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:43,039 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 80 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:43,039 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414706192] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:43,039 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:43,039 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2022-07-22 09:50:43,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566185200] [2022-07-22 09:50:43,039 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:43,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-07-22 09:50:43,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:43,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-07-22 09:50:43,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2022-07-22 09:50:43,041 INFO L87 Difference]: Start difference. First operand 286 states and 356 transitions. Second operand has 33 states, 33 states have (on average 4.151515151515151) internal successors, (137), 33 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:43,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:43,272 INFO L93 Difference]: Finished difference Result 477 states and 573 transitions. [2022-07-22 09:50:43,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-07-22 09:50:43,272 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.151515151515151) internal successors, (137), 33 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2022-07-22 09:50:43,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:43,273 INFO L225 Difference]: With dead ends: 477 [2022-07-22 09:50:43,273 INFO L226 Difference]: Without dead ends: 345 [2022-07-22 09:50:43,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=365, Invalid=1041, Unknown=0, NotChecked=0, Total=1406 [2022-07-22 09:50:43,274 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 291 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:43,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [291 Valid, 182 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-22 09:50:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2022-07-22 09:50:43,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 303. [2022-07-22 09:50:43,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 302 states have (on average 1.228476821192053) internal successors, (371), 302 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:43,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 371 transitions. [2022-07-22 09:50:43,299 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 371 transitions. Word has length 50 [2022-07-22 09:50:43,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:43,299 INFO L495 AbstractCegarLoop]: Abstraction has 303 states and 371 transitions. [2022-07-22 09:50:43,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.151515151515151) internal successors, (137), 33 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:43,300 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 371 transitions. [2022-07-22 09:50:43,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 09:50:43,300 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:43,300 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:43,317 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 09:50:43,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:43,507 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:43,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:43,508 INFO L85 PathProgramCache]: Analyzing trace with hash 588720312, now seen corresponding path program 6 times [2022-07-22 09:50:43,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:43,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374172653] [2022-07-22 09:50:43,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:43,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:43,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:43,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374172653] [2022-07-22 09:50:43,723 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374172653] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:43,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849701254] [2022-07-22 09:50:43,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-22 09:50:43,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:43,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:43,724 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 09:50:43,725 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 09:50:43,854 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-22 09:50:43,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:43,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:50:43,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:43,923 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 16 treesize of output 12 [2022-07-22 09:50:43,954 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:43,955 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 29 treesize of output 28 [2022-07-22 09:50:43,971 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:43,971 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 29 treesize of output 28 [2022-07-22 09:50:43,988 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:43,988 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 29 treesize of output 28 [2022-07-22 09:50:43,998 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:50:43,998 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 23 treesize of output 22 [2022-07-22 09:50:44,292 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:44,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:44,584 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 25 treesize of output 23 [2022-07-22 09:50:44,586 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 88 treesize of output 84 [2022-07-22 09:50:44,700 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 10 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:44,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [849701254] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:44,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:44,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14, 14] total 39 [2022-07-22 09:50:44,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742044402] [2022-07-22 09:50:44,701 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:44,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 09:50:44,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:44,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 09:50:44,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=1337, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 09:50:44,702 INFO L87 Difference]: Start difference. First operand 303 states and 371 transitions. Second operand has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:53,028 INFO L93 Difference]: Finished difference Result 1367 states and 1619 transitions. [2022-07-22 09:50:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-07-22 09:50:53,028 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-22 09:50:53,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:53,031 INFO L225 Difference]: With dead ends: 1367 [2022-07-22 09:50:53,031 INFO L226 Difference]: Without dead ends: 1232 [2022-07-22 09:50:53,035 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 100 SyntacticMatches, 55 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20797 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=4325, Invalid=37905, Unknown=0, NotChecked=0, Total=42230 [2022-07-22 09:50:53,035 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 1178 mSDsluCounter, 658 mSDsCounter, 0 mSdLazyCounter, 2493 mSolverCounterSat, 1130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 5052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1130 IncrementalHoareTripleChecker+Valid, 2493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1429 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:53,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 693 Invalid, 5052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1130 Valid, 2493 Invalid, 0 Unknown, 1429 Unchecked, 1.6s Time] [2022-07-22 09:50:53,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1232 states. [2022-07-22 09:50:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1232 to 420. [2022-07-22 09:50:53,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.1909307875894988) internal successors, (499), 419 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:53,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 499 transitions. [2022-07-22 09:50:53,099 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 499 transitions. Word has length 57 [2022-07-22 09:50:53,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:53,099 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 499 transitions. [2022-07-22 09:50:53,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.102564102564102) internal successors, (160), 39 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:53,099 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 499 transitions. [2022-07-22 09:50:53,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-07-22 09:50:53,099 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:53,100 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:53,117 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 09:50:53,300 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,SelfDestructingSolverStorable20 [2022-07-22 09:50:53,300 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:53,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:53,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1863223928, now seen corresponding path program 2 times [2022-07-22 09:50:53,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:53,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32099565] [2022-07-22 09:50:53,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:53,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:53,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:53,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:53,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32099565] [2022-07-22 09:50:53,409 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32099565] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:53,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48815298] [2022-07-22 09:50:53,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:50:53,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:53,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:53,411 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 09:50:53,412 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 09:50:53,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:50:53,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:50:53,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 09:50:53,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:53,495 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 16 treesize of output 12 [2022-07-22 09:50:53,505 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:53,506 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 29 treesize of output 28 [2022-07-22 09:50:53,515 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:53,515 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 29 treesize of output 28 [2022-07-22 09:50:53,525 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:53,525 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 29 treesize of output 28 [2022-07-22 09:50:53,536 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:53,536 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 29 treesize of output 28 [2022-07-22 09:50:53,694 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:50:53,694 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-22 09:50:53,705 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:53,706 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:53,790 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 17 treesize of output 15 [2022-07-22 09:50:53,791 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 30 treesize of output 26 [2022-07-22 09:50:53,804 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 0 proven. 89 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:53,804 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48815298] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:53,804 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:53,804 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-07-22 09:50:53,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15160998] [2022-07-22 09:50:53,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:53,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-22 09:50:53,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:53,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-22 09:50:53,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-22 09:50:53,806 INFO L87 Difference]: Start difference. First operand 420 states and 499 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:56,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:50:56,845 INFO L93 Difference]: Finished difference Result 1214 states and 1423 transitions. [2022-07-22 09:50:56,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-07-22 09:50:56,847 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2022-07-22 09:50:56,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:50:56,849 INFO L225 Difference]: With dead ends: 1214 [2022-07-22 09:50:56,849 INFO L226 Difference]: Without dead ends: 1212 [2022-07-22 09:50:56,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8608 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1761, Invalid=19995, Unknown=0, NotChecked=0, Total=21756 [2022-07-22 09:50:56,851 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 395 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 3747 mSolverCounterSat, 367 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 4114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 367 IncrementalHoareTripleChecker+Valid, 3747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:50:56,852 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [395 Valid, 368 Invalid, 4114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [367 Valid, 3747 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 09:50:56,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1212 states. [2022-07-22 09:50:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1212 to 454. [2022-07-22 09:50:56,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 453 states have (on average 1.1876379690949228) internal successors, (538), 453 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 538 transitions. [2022-07-22 09:50:56,894 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 538 transitions. Word has length 57 [2022-07-22 09:50:56,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:50:56,894 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 538 transitions. [2022-07-22 09:50:56,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 20 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:50:56,894 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 538 transitions. [2022-07-22 09:50:56,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 09:50:56,895 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:50:56,895 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:50:56,918 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 09:50:57,103 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,SelfDestructingSolverStorable21 [2022-07-22 09:50:57,103 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:50:57,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:50:57,104 INFO L85 PathProgramCache]: Analyzing trace with hash -197389365, now seen corresponding path program 7 times [2022-07-22 09:50:57,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:50:57,104 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869584706] [2022-07-22 09:50:57,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:50:57,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:50:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:57,302 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:57,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:50:57,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869584706] [2022-07-22 09:50:57,302 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869584706] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:50:57,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497864038] [2022-07-22 09:50:57,302 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-22 09:50:57,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:50:57,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:50:57,303 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 09:50:57,304 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 09:50:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:50:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 37 conjunts are in the unsatisfiable core [2022-07-22 09:50:57,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:50:57,452 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 16 treesize of output 12 [2022-07-22 09:50:57,476 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:57,476 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 29 treesize of output 28 [2022-07-22 09:50:57,496 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:57,497 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 29 treesize of output 28 [2022-07-22 09:50:57,511 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:50:57,512 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 29 treesize of output 28 [2022-07-22 09:50:57,790 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:57,790 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:50:58,023 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 17 treesize of output 15 [2022-07-22 09:50:58,024 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 34 treesize of output 30 [2022-07-22 09:50:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:50:58,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497864038] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:50:58,133 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:50:58,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 39 [2022-07-22 09:50:58,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498091091] [2022-07-22 09:50:58,133 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:50:58,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 09:50:58,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:50:58,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 09:50:58,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1340, Unknown=0, NotChecked=0, Total=1482 [2022-07-22 09:50:58,134 INFO L87 Difference]: Start difference. First operand 454 states and 538 transitions. Second operand has 39 states, 39 states have (on average 4.384615384615385) internal successors, (171), 39 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:00,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:51:00,799 INFO L93 Difference]: Finished difference Result 974 states and 1123 transitions. [2022-07-22 09:51:00,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-07-22 09:51:00,799 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.384615384615385) internal successors, (171), 39 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 09:51:00,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:51:00,801 INFO L225 Difference]: With dead ends: 974 [2022-07-22 09:51:00,801 INFO L226 Difference]: Without dead ends: 942 [2022-07-22 09:51:00,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 116 SyntacticMatches, 6 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4216 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1632, Invalid=12410, Unknown=0, NotChecked=0, Total=14042 [2022-07-22 09:51:00,802 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 527 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 2390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 296 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:51:00,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [527 Valid, 484 Invalid, 2390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 1536 Invalid, 0 Unknown, 296 Unchecked, 0.9s Time] [2022-07-22 09:51:00,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2022-07-22 09:51:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 466. [2022-07-22 09:51:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.1827956989247312) internal successors, (550), 465 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 550 transitions. [2022-07-22 09:51:00,854 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 550 transitions. Word has length 63 [2022-07-22 09:51:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:51:00,854 INFO L495 AbstractCegarLoop]: Abstraction has 466 states and 550 transitions. [2022-07-22 09:51:00,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.384615384615385) internal successors, (171), 39 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 550 transitions. [2022-07-22 09:51:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 09:51:00,855 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:51:00,856 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:51:00,872 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 09:51:01,069 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,SelfDestructingSolverStorable22 [2022-07-22 09:51:01,069 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:51:01,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:51:01,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1340950665, now seen corresponding path program 1 times [2022-07-22 09:51:01,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:51:01,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385872944] [2022-07-22 09:51:01,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:01,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:51:01,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:01,089 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 114 trivial. 0 not checked. [2022-07-22 09:51:01,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:51:01,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385872944] [2022-07-22 09:51:01,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385872944] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:51:01,089 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:51:01,089 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:51:01,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234757305] [2022-07-22 09:51:01,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:51:01,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:51:01,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:51:01,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:51:01,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:51:01,091 INFO L87 Difference]: Start difference. First operand 466 states and 550 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:01,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:51:01,132 INFO L93 Difference]: Finished difference Result 609 states and 720 transitions. [2022-07-22 09:51:01,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:51:01,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 09:51:01,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:51:01,133 INFO L225 Difference]: With dead ends: 609 [2022-07-22 09:51:01,133 INFO L226 Difference]: Without dead ends: 325 [2022-07-22 09:51:01,134 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:51:01,134 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:51:01,134 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 54 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:51:01,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-07-22 09:51:01,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 271. [2022-07-22 09:51:01,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.1555555555555554) internal successors, (312), 270 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:01,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 312 transitions. [2022-07-22 09:51:01,161 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 312 transitions. Word has length 63 [2022-07-22 09:51:01,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:51:01,161 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 312 transitions. [2022-07-22 09:51:01,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:01,162 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 312 transitions. [2022-07-22 09:51:01,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 09:51:01,162 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:51:01,162 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:51:01,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-07-22 09:51:01,163 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:51:01,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:51:01,163 INFO L85 PathProgramCache]: Analyzing trace with hash -2060530293, now seen corresponding path program 2 times [2022-07-22 09:51:01,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:51:01,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366651132] [2022-07-22 09:51:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:01,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:51:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:01,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:51:01,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366651132] [2022-07-22 09:51:01,346 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366651132] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:51:01,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306065973] [2022-07-22 09:51:01,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:51:01,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:51:01,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:51:01,347 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 09:51:01,348 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 09:51:01,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:51:01,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:51:01,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 33 conjunts are in the unsatisfiable core [2022-07-22 09:51:01,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:51:01,518 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 16 treesize of output 12 [2022-07-22 09:51:01,547 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:51:01,547 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 29 treesize of output 28 [2022-07-22 09:51:01,556 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:51:01,556 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 29 treesize of output 28 [2022-07-22 09:51:01,586 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:51:01,587 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 23 treesize of output 22 [2022-07-22 09:51:01,840 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 09:51:01,846 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:01,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:51:02,093 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 17 treesize of output 15 [2022-07-22 09:51:02,096 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 34 treesize of output 30 [2022-07-22 09:51:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:02,230 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306065973] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:51:02,230 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:51:02,230 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 15] total 41 [2022-07-22 09:51:02,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841509028] [2022-07-22 09:51:02,230 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:51:02,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-07-22 09:51:02,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:51:02,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-07-22 09:51:02,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1490, Unknown=0, NotChecked=0, Total=1640 [2022-07-22 09:51:02,231 INFO L87 Difference]: Start difference. First operand 271 states and 312 transitions. Second operand has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 41 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:06,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:51:06,779 INFO L93 Difference]: Finished difference Result 875 states and 987 transitions. [2022-07-22 09:51:06,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-07-22 09:51:06,779 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 41 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 09:51:06,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:51:06,781 INFO L225 Difference]: With dead ends: 875 [2022-07-22 09:51:06,781 INFO L226 Difference]: Without dead ends: 865 [2022-07-22 09:51:06,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 112 SyntacticMatches, 4 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6512 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=2447, Invalid=19309, Unknown=0, NotChecked=0, Total=21756 [2022-07-22 09:51:06,783 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 770 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 1226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 770 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 3850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1226 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 675 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:51:06,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [770 Valid, 490 Invalid, 3850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1226 Valid, 1949 Invalid, 0 Unknown, 675 Unchecked, 1.2s Time] [2022-07-22 09:51:06,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-07-22 09:51:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 277. [2022-07-22 09:51:06,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 276 states have (on average 1.1521739130434783) internal successors, (318), 276 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:06,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 318 transitions. [2022-07-22 09:51:06,832 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 318 transitions. Word has length 63 [2022-07-22 09:51:06,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:51:06,833 INFO L495 AbstractCegarLoop]: Abstraction has 277 states and 318 transitions. [2022-07-22 09:51:06,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 4.317073170731708) internal successors, (177), 41 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:06,833 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 318 transitions. [2022-07-22 09:51:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 09:51:06,834 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:51:06,834 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:51:06,852 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 09:51:07,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:51:07,040 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:51:07,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:51:07,040 INFO L85 PathProgramCache]: Analyzing trace with hash 336799115, now seen corresponding path program 3 times [2022-07-22 09:51:07,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:51:07,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716764595] [2022-07-22 09:51:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:07,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:51:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:07,215 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:07,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:51:07,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716764595] [2022-07-22 09:51:07,215 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716764595] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:51:07,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599407908] [2022-07-22 09:51:07,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:51:07,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:51:07,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:51:07,217 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 09:51:07,218 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 09:51:07,291 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-22 09:51:07,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:51:07,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-22 09:51:07,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:51:07,368 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 16 treesize of output 12 [2022-07-22 09:51:07,399 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:07,400 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:51:07,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:07,408 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:51:07,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:07,419 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 28 [2022-07-22 09:51:07,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:51:07,434 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2022-07-22 09:51:07,474 INFO L356 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2022-07-22 09:51:07,474 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 24 treesize of output 23 [2022-07-22 09:51:07,517 INFO L356 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2022-07-22 09:51:07,517 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-07-22 09:51:07,541 INFO L356 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2022-07-22 09:51:07,542 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-07-22 09:51:07,559 INFO L356 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2022-07-22 09:51:07,560 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-07-22 09:51:07,601 INFO L356 Elim1Store]: treesize reduction 80, result has 20.0 percent of original size [2022-07-22 09:51:07,601 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 38 [2022-07-22 09:51:07,720 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 15 treesize of output 7 [2022-07-22 09:51:07,738 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 09:51:07,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:51:22,259 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 39 treesize of output 37 [2022-07-22 09:51:22,261 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 2940 treesize of output 2924 [2022-07-22 09:51:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 102 trivial. 0 not checked. [2022-07-22 09:51:43,747 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599407908] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:51:43,747 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:51:43,747 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 14] total 38 [2022-07-22 09:51:43,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192345339] [2022-07-22 09:51:43,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:51:43,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-07-22 09:51:43,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:51:43,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-07-22 09:51:43,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1245, Unknown=14, NotChecked=0, Total=1406 [2022-07-22 09:51:43,749 INFO L87 Difference]: Start difference. First operand 277 states and 318 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:49,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:51:49,184 INFO L93 Difference]: Finished difference Result 595 states and 670 transitions. [2022-07-22 09:51:49,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-07-22 09:51:49,185 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 09:51:49,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:51:49,186 INFO L225 Difference]: With dead ends: 595 [2022-07-22 09:51:49,186 INFO L226 Difference]: Without dead ends: 549 [2022-07-22 09:51:49,187 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 135 SyntacticMatches, 10 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4236 ImplicationChecksByTransitivity, 20.4s TimeCoverageRelationStatistics Valid=2027, Invalid=12718, Unknown=17, NotChecked=0, Total=14762 [2022-07-22 09:51:49,187 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 914 mSDsluCounter, 890 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 914 SdHoareTripleChecker+Valid, 943 SdHoareTripleChecker+Invalid, 2608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 264 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-22 09:51:49,188 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [914 Valid, 943 Invalid, 2608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 1984 Invalid, 0 Unknown, 264 Unchecked, 0.8s Time] [2022-07-22 09:51:49,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-07-22 09:51:49,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 345. [2022-07-22 09:51:49,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 1.1453488372093024) internal successors, (394), 344 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 394 transitions. [2022-07-22 09:51:49,225 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 394 transitions. Word has length 63 [2022-07-22 09:51:49,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:51:49,225 INFO L495 AbstractCegarLoop]: Abstraction has 345 states and 394 transitions. [2022-07-22 09:51:49,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 38 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 394 transitions. [2022-07-22 09:51:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-07-22 09:51:49,226 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:51:49,227 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:51:49,247 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 09:51:49,443 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,SelfDestructingSolverStorable25 [2022-07-22 09:51:49,443 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:51:49,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:51:49,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2004028023, now seen corresponding path program 2 times [2022-07-22 09:51:49,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:51:49,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222846588] [2022-07-22 09:51:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:49,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:51:49,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:49,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:51:49,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222846588] [2022-07-22 09:51:49,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222846588] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:51:49,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404269775] [2022-07-22 09:51:49,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:51:49,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:51:49,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:51:49,581 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 09:51:49,582 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 09:51:49,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:51:49,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:51:49,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 09:51:49,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:51:49,673 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 16 treesize of output 12 [2022-07-22 09:51:49,685 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:51:49,686 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 29 treesize of output 28 [2022-07-22 09:51:49,703 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:51:49,703 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 29 treesize of output 28 [2022-07-22 09:51:49,715 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:51:49,715 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 29 treesize of output 28 [2022-07-22 09:51:49,902 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:51:49,902 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-22 09:51:49,914 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:49,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:51:50,000 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 17 treesize of output 15 [2022-07-22 09:51:50,002 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 30 treesize of output 26 [2022-07-22 09:51:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:50,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404269775] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:51:50,022 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:51:50,022 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 22 [2022-07-22 09:51:50,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991751741] [2022-07-22 09:51:50,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:51:50,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-22 09:51:50,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:51:50,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-22 09:51:50,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2022-07-22 09:51:50,023 INFO L87 Difference]: Start difference. First operand 345 states and 394 transitions. Second operand has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:53,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:51:53,921 INFO L93 Difference]: Finished difference Result 1161 states and 1329 transitions. [2022-07-22 09:51:53,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-07-22 09:51:53,921 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2022-07-22 09:51:53,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:51:53,924 INFO L225 Difference]: With dead ends: 1161 [2022-07-22 09:51:53,924 INFO L226 Difference]: Without dead ends: 1159 [2022-07-22 09:51:53,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 112 SyntacticMatches, 10 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15519 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2666, Invalid=34776, Unknown=0, NotChecked=0, Total=37442 [2022-07-22 09:51:53,927 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 483 mSDsluCounter, 388 mSDsCounter, 0 mSdLazyCounter, 3721 mSolverCounterSat, 432 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 4153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 432 IncrementalHoareTripleChecker+Valid, 3721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:51:53,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [483 Valid, 437 Invalid, 4153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [432 Valid, 3721 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-07-22 09:51:53,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1159 states. [2022-07-22 09:51:53,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1159 to 363. [2022-07-22 09:51:53,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 362 states have (on average 1.143646408839779) internal successors, (414), 362 states have internal predecessors, (414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:53,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 414 transitions. [2022-07-22 09:51:53,970 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 414 transitions. Word has length 63 [2022-07-22 09:51:53,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:51:53,970 INFO L495 AbstractCegarLoop]: Abstraction has 363 states and 414 transitions. [2022-07-22 09:51:53,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.045454545454546) internal successors, (111), 22 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:51:53,970 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 414 transitions. [2022-07-22 09:51:53,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 09:51:53,971 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:51:53,971 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:51:53,987 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 09:51:54,171 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,SelfDestructingSolverStorable26 [2022-07-22 09:51:54,171 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:51:54,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:51:54,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1613028194, now seen corresponding path program 8 times [2022-07-22 09:51:54,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:51:54,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042787951] [2022-07-22 09:51:54,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:51:54,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:51:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:51:54,356 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:54,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:51:54,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042787951] [2022-07-22 09:51:54,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042787951] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:51:54,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [833985609] [2022-07-22 09:51:54,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-22 09:51:54,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:51:54,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:51:54,357 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 09:51:54,358 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 09:51:54,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-22 09:51:54,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:51:54,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 09:51:54,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:51:54,524 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 16 treesize of output 12 [2022-07-22 09:51:54,555 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:51:54,555 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 29 treesize of output 28 [2022-07-22 09:51:54,564 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:51:54,564 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 23 treesize of output 22 [2022-07-22 09:51:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 14 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:54,892 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:51:55,329 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 35 treesize of output 31 [2022-07-22 09:51:55,331 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 67 treesize of output 59 [2022-07-22 09:51:55,523 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:51:55,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [833985609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:51:55,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:51:55,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 18] total 47 [2022-07-22 09:51:55,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129778159] [2022-07-22 09:51:55,523 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:51:55,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-22 09:51:55,524 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:51:55,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-22 09:51:55,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=1989, Unknown=0, NotChecked=0, Total=2162 [2022-07-22 09:51:55,525 INFO L87 Difference]: Start difference. First operand 363 states and 414 transitions. Second operand has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:04,247 INFO L93 Difference]: Finished difference Result 2054 states and 2336 transitions. [2022-07-22 09:52:04,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-07-22 09:52:04,247 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 09:52:04,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:04,250 INFO L225 Difference]: With dead ends: 2054 [2022-07-22 09:52:04,250 INFO L226 Difference]: Without dead ends: 1756 [2022-07-22 09:52:04,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 107 SyntacticMatches, 3 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18600 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=5033, Invalid=46269, Unknown=0, NotChecked=0, Total=51302 [2022-07-22 09:52:04,254 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 759 mSDsluCounter, 504 mSDsCounter, 0 mSdLazyCounter, 3210 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 759 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 4026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 3210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:04,254 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [759 Valid, 532 Invalid, 4026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 3210 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-07-22 09:52:04,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1756 states. [2022-07-22 09:52:04,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1756 to 614. [2022-07-22 09:52:04,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 614 states, 613 states have (on average 1.135399673735726) internal successors, (696), 613 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 614 states to 614 states and 696 transitions. [2022-07-22 09:52:04,344 INFO L78 Accepts]: Start accepts. Automaton has 614 states and 696 transitions. Word has length 69 [2022-07-22 09:52:04,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:04,344 INFO L495 AbstractCegarLoop]: Abstraction has 614 states and 696 transitions. [2022-07-22 09:52:04,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 4.23404255319149) internal successors, (199), 47 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,344 INFO L276 IsEmpty]: Start isEmpty. Operand 614 states and 696 transitions. [2022-07-22 09:52:04,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 09:52:04,345 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:04,345 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:04,363 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 09:52:04,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2022-07-22 09:52:04,559 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:04,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:04,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1288906012, now seen corresponding path program 1 times [2022-07-22 09:52:04,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:04,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130808859] [2022-07-22 09:52:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:04,560 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:04,574 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2022-07-22 09:52:04,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:04,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130808859] [2022-07-22 09:52:04,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130808859] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:52:04,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:52:04,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 09:52:04,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705755571] [2022-07-22 09:52:04,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:52:04,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 09:52:04,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:04,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 09:52:04,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:52:04,576 INFO L87 Difference]: Start difference. First operand 614 states and 696 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:04,685 INFO L93 Difference]: Finished difference Result 1269 states and 1440 transitions. [2022-07-22 09:52:04,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 09:52:04,686 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 09:52:04,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:04,687 INFO L225 Difference]: With dead ends: 1269 [2022-07-22 09:52:04,688 INFO L226 Difference]: Without dead ends: 808 [2022-07-22 09:52:04,688 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 09:52:04,689 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 15 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:04,689 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 55 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:52:04,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-07-22 09:52:04,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 625. [2022-07-22 09:52:04,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 625 states, 624 states have (on average 1.125) internal successors, (702), 624 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 625 states to 625 states and 702 transitions. [2022-07-22 09:52:04,770 INFO L78 Accepts]: Start accepts. Automaton has 625 states and 702 transitions. Word has length 69 [2022-07-22 09:52:04,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:04,771 INFO L495 AbstractCegarLoop]: Abstraction has 625 states and 702 transitions. [2022-07-22 09:52:04,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,771 INFO L276 IsEmpty]: Start isEmpty. Operand 625 states and 702 transitions. [2022-07-22 09:52:04,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 09:52:04,772 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:04,772 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:04,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-07-22 09:52:04,772 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:04,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:04,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1732806686, now seen corresponding path program 1 times [2022-07-22 09:52:04,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:04,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737185474] [2022-07-22 09:52:04,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:04,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:04,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-07-22 09:52:04,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:04,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737185474] [2022-07-22 09:52:04,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737185474] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:52:04,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:52:04,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:52:04,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145414271] [2022-07-22 09:52:04,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:52:04,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:52:04,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:04,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:52:04,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:52:04,798 INFO L87 Difference]: Start difference. First operand 625 states and 702 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:04,884 INFO L93 Difference]: Finished difference Result 714 states and 797 transitions. [2022-07-22 09:52:04,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:52:04,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 09:52:04,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:04,886 INFO L225 Difference]: With dead ends: 714 [2022-07-22 09:52:04,886 INFO L226 Difference]: Without dead ends: 602 [2022-07-22 09:52:04,886 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 09:52:04,887 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:04,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 41 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:52:04,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2022-07-22 09:52:04,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 571. [2022-07-22 09:52:04,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 1.1263157894736842) internal successors, (642), 570 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 642 transitions. [2022-07-22 09:52:04,958 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 642 transitions. Word has length 69 [2022-07-22 09:52:04,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:04,958 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 642 transitions. [2022-07-22 09:52:04,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:04,959 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 642 transitions. [2022-07-22 09:52:04,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 09:52:04,959 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:04,960 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:04,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-07-22 09:52:04,960 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:04,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:04,960 INFO L85 PathProgramCache]: Analyzing trace with hash -763757732, now seen corresponding path program 1 times [2022-07-22 09:52:04,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:04,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591846002] [2022-07-22 09:52:04,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:04,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:04,985 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 158 trivial. 0 not checked. [2022-07-22 09:52:04,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:04,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591846002] [2022-07-22 09:52:04,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591846002] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 09:52:04,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 09:52:04,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-22 09:52:04,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709124205] [2022-07-22 09:52:04,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 09:52:04,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-22 09:52:04,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:04,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-22 09:52:04,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-22 09:52:04,987 INFO L87 Difference]: Start difference. First operand 571 states and 642 transitions. Second operand has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:05,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:05,071 INFO L93 Difference]: Finished difference Result 695 states and 781 transitions. [2022-07-22 09:52:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-22 09:52:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 09:52:05,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:05,072 INFO L225 Difference]: With dead ends: 695 [2022-07-22 09:52:05,072 INFO L226 Difference]: Without dead ends: 460 [2022-07-22 09:52:05,073 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 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 09:52:05,073 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 55 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:05,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 40 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 09:52:05,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-07-22 09:52:05,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 444. [2022-07-22 09:52:05,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.1218961625282167) internal successors, (497), 443 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:05,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 497 transitions. [2022-07-22 09:52:05,133 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 497 transitions. Word has length 69 [2022-07-22 09:52:05,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:05,133 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 497 transitions. [2022-07-22 09:52:05,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.0) internal successors, (28), 4 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:05,133 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 497 transitions. [2022-07-22 09:52:05,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-07-22 09:52:05,134 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:05,134 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:05,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-07-22 09:52:05,134 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:05,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:05,135 INFO L85 PathProgramCache]: Analyzing trace with hash 2073835932, now seen corresponding path program 1 times [2022-07-22 09:52:05,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:05,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609732011] [2022-07-22 09:52:05,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:05,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:05,253 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:05,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:05,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609732011] [2022-07-22 09:52:05,254 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609732011] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:05,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660534958] [2022-07-22 09:52:05,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:05,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:05,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:05,255 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 09:52:05,256 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 09:52:05,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:05,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 09:52:05,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:05,353 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 16 treesize of output 12 [2022-07-22 09:52:05,361 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:52:05,361 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 29 treesize of output 28 [2022-07-22 09:52:05,371 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:52:05,371 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 29 treesize of output 28 [2022-07-22 09:52:05,587 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:52:05,588 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-22 09:52:05,601 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:05,601 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:52:05,687 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 17 treesize of output 15 [2022-07-22 09:52:05,688 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 30 treesize of output 26 [2022-07-22 09:52:05,704 INFO L134 CoverageAnalysis]: Checked inductivity of 163 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:05,704 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660534958] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:52:05,704 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:52:05,704 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 24 [2022-07-22 09:52:05,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619552377] [2022-07-22 09:52:05,704 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:52:05,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-22 09:52:05,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:52:05,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-22 09:52:05,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2022-07-22 09:52:05,705 INFO L87 Difference]: Start difference. First operand 444 states and 497 transitions. Second operand has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:10,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:52:10,330 INFO L93 Difference]: Finished difference Result 1430 states and 1601 transitions. [2022-07-22 09:52:10,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2022-07-22 09:52:10,330 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2022-07-22 09:52:10,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:52:10,333 INFO L225 Difference]: With dead ends: 1430 [2022-07-22 09:52:10,333 INFO L226 Difference]: Without dead ends: 1428 [2022-07-22 09:52:10,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 123 SyntacticMatches, 9 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23976 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3783, Invalid=52149, Unknown=0, NotChecked=0, Total=55932 [2022-07-22 09:52:10,337 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 658 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 2981 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 658 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 3504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 2981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:52:10,337 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [658 Valid, 506 Invalid, 3504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [523 Valid, 2981 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-07-22 09:52:10,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2022-07-22 09:52:10,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 406. [2022-07-22 09:52:10,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 1.1209876543209876) internal successors, (454), 405 states have internal predecessors, (454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:10,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 454 transitions. [2022-07-22 09:52:10,402 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 454 transitions. Word has length 69 [2022-07-22 09:52:10,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:52:10,403 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 454 transitions. [2022-07-22 09:52:10,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.083333333333333) internal successors, (122), 24 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:52:10,403 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 454 transitions. [2022-07-22 09:52:10,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-07-22 09:52:10,404 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:52:10,404 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:52:10,420 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 09:52:10,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:10,604 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:52:10,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:52:10,605 INFO L85 PathProgramCache]: Analyzing trace with hash -528467946, now seen corresponding path program 4 times [2022-07-22 09:52:10,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:52:10,605 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897174841] [2022-07-22 09:52:10,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:52:10,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:52:10,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:52:10,854 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:10,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:52:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897174841] [2022-07-22 09:52:10,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897174841] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:52:10,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749323364] [2022-07-22 09:52:10,854 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:52:10,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:52:10,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:52:10,856 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 09:52:10,875 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 09:52:10,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:52:10,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:52:10,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 42 conjunts are in the unsatisfiable core [2022-07-22 09:52:10,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:52:11,001 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 16 treesize of output 12 [2022-07-22 09:52:11,033 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:52:11,033 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 29 treesize of output 28 [2022-07-22 09:52:11,043 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:52:11,044 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 29 treesize of output 28 [2022-07-22 09:52:11,053 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:52:11,053 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 29 treesize of output 28 [2022-07-22 09:52:11,079 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:11,079 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 26 treesize of output 25 [2022-07-22 09:52:11,091 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:11,091 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 26 treesize of output 25 [2022-07-22 09:52:11,099 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:11,099 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 26 treesize of output 25 [2022-07-22 09:52:11,109 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:11,109 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 26 treesize of output 25 [2022-07-22 09:52:11,118 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-22 09:52:11,118 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 26 treesize of output 25 [2022-07-22 09:52:11,329 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 09:52:11,332 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:52:11,332 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:04,203 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 25 treesize of output 23 [2022-07-22 09:53:04,205 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 88 treesize of output 84 [2022-07-22 09:53:04,261 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 12 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:04,261 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749323364] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:04,261 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:04,261 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 17] total 39 [2022-07-22 09:53:04,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450168179] [2022-07-22 09:53:04,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:04,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-22 09:53:04,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:04,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-22 09:53:04,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=1300, Unknown=30, NotChecked=0, Total=1482 [2022-07-22 09:53:04,263 INFO L87 Difference]: Start difference. First operand 406 states and 454 transitions. Second operand has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:06,996 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 5) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select .cse0 (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (= 5 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 24))) (forall ((|v_ULTIMATE.start_main_~i~0#1_256| Int)) (or (forall ((v_ArrVal_1006 Int)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (- 16) (* 20 |v_ULTIMATE.start_main_~i~0#1_256|) |c_ULTIMATE.start_main_~#volArray~0#1.offset|) v_ArrVal_1006) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 24)))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_256|)))))) is different from false [2022-07-22 09:53:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:10,251 INFO L93 Difference]: Finished difference Result 897 states and 974 transitions. [2022-07-22 09:53:10,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-07-22 09:53:10,252 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2022-07-22 09:53:10,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:10,254 INFO L225 Difference]: With dead ends: 897 [2022-07-22 09:53:10,254 INFO L226 Difference]: Without dead ends: 881 [2022-07-22 09:53:10,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 134 SyntacticMatches, 10 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2685 ImplicationChecksByTransitivity, 58.3s TimeCoverageRelationStatistics Valid=931, Invalid=7971, Unknown=32, NotChecked=186, Total=9120 [2022-07-22 09:53:10,256 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 738 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 1237 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 738 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 1666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 1237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 254 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:10,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [738 Valid, 581 Invalid, 1666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 1237 Invalid, 0 Unknown, 254 Unchecked, 0.6s Time] [2022-07-22 09:53:10,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 881 states. [2022-07-22 09:53:10,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 881 to 330. [2022-07-22 09:53:10,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 1.1185410334346504) internal successors, (368), 329 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:10,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 368 transitions. [2022-07-22 09:53:10,316 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 368 transitions. Word has length 70 [2022-07-22 09:53:10,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:10,316 INFO L495 AbstractCegarLoop]: Abstraction has 330 states and 368 transitions. [2022-07-22 09:53:10,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 4.6923076923076925) internal successors, (183), 39 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:10,317 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 368 transitions. [2022-07-22 09:53:10,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 09:53:10,317 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:10,317 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:10,333 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 09:53:10,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:10,518 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:10,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:10,518 INFO L85 PathProgramCache]: Analyzing trace with hash -709817551, now seen corresponding path program 9 times [2022-07-22 09:53:10,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:10,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449035956] [2022-07-22 09:53:10,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:10,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:10,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:10,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:10,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449035956] [2022-07-22 09:53:10,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449035956] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:10,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532368287] [2022-07-22 09:53:10,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:53:10,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:10,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:10,726 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 09:53:10,727 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 09:53:10,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 09:53:10,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:10,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-22 09:53:10,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:10,999 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 16 treesize of output 12 [2022-07-22 09:53:11,025 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:53:11,026 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 23 treesize of output 22 [2022-07-22 09:53:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:11,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:11,747 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 25 treesize of output 23 [2022-07-22 09:53:11,749 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 200 treesize of output 192 [2022-07-22 09:53:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 16 proven. 193 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:11,874 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532368287] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:11,874 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:11,874 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 48 [2022-07-22 09:53:11,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262774773] [2022-07-22 09:53:11,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:11,875 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-07-22 09:53:11,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:11,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-07-22 09:53:11,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=2065, Unknown=0, NotChecked=0, Total=2256 [2022-07-22 09:53:11,875 INFO L87 Difference]: Start difference. First operand 330 states and 368 transitions. Second operand has 48 states, 48 states have (on average 4.458333333333333) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:20,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:20,330 INFO L93 Difference]: Finished difference Result 859 states and 929 transitions. [2022-07-22 09:53:20,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-07-22 09:53:20,331 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 4.458333333333333) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 09:53:20,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:20,332 INFO L225 Difference]: With dead ends: 859 [2022-07-22 09:53:20,333 INFO L226 Difference]: Without dead ends: 843 [2022-07-22 09:53:20,334 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 121 SyntacticMatches, 55 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20158 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=4023, Invalid=36579, Unknown=0, NotChecked=0, Total=40602 [2022-07-22 09:53:20,334 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 829 mSDsluCounter, 761 mSDsCounter, 0 mSdLazyCounter, 2960 mSolverCounterSat, 743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 829 SdHoareTripleChecker+Valid, 801 SdHoareTripleChecker+Invalid, 3817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 743 IncrementalHoareTripleChecker+Valid, 2960 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 114 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:20,335 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [829 Valid, 801 Invalid, 3817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [743 Valid, 2960 Invalid, 0 Unknown, 114 Unchecked, 1.7s Time] [2022-07-22 09:53:20,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-07-22 09:53:20,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 370. [2022-07-22 09:53:20,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 1.1165311653116532) internal successors, (412), 369 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:20,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 412 transitions. [2022-07-22 09:53:20,393 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 412 transitions. Word has length 75 [2022-07-22 09:53:20,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:20,393 INFO L495 AbstractCegarLoop]: Abstraction has 370 states and 412 transitions. [2022-07-22 09:53:20,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 4.458333333333333) internal successors, (214), 48 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:20,393 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 412 transitions. [2022-07-22 09:53:20,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 09:53:20,394 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:20,394 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:20,411 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 09:53:20,600 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,SelfDestructingSolverStorable33 [2022-07-22 09:53:20,601 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:20,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:20,601 INFO L85 PathProgramCache]: Analyzing trace with hash -596856401, now seen corresponding path program 5 times [2022-07-22 09:53:20,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:20,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296526656] [2022-07-22 09:53:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:20,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:20,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:20,749 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:20,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296526656] [2022-07-22 09:53:20,749 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296526656] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:20,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856092065] [2022-07-22 09:53:20,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:53:20,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:20,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:20,751 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 09:53:20,752 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 09:53:20,972 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2022-07-22 09:53:20,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:20,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-22 09:53:20,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:21,043 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 16 treesize of output 12 [2022-07-22 09:53:21,074 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:53:21,074 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 29 treesize of output 28 [2022-07-22 09:53:21,086 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:53:21,087 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 29 treesize of output 28 [2022-07-22 09:53:21,127 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:53:21,127 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 29 treesize of output 28 [2022-07-22 09:53:21,140 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-22 09:53:21,140 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 23 treesize of output 22 [2022-07-22 09:53:21,408 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 09:53:21,433 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 106 proven. 79 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 09:53:21,434 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:21,788 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 17 treesize of output 15 [2022-07-22 09:53:21,790 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 34 treesize of output 30 [2022-07-22 09:53:21,897 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 106 proven. 79 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-07-22 09:53:21,898 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856092065] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:21,898 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:21,898 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 40 [2022-07-22 09:53:21,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250996554] [2022-07-22 09:53:21,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:21,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-22 09:53:21,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:21,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-22 09:53:21,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2022-07-22 09:53:21,899 INFO L87 Difference]: Start difference. First operand 370 states and 412 transitions. Second operand has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:27,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:27,760 INFO L93 Difference]: Finished difference Result 807 states and 892 transitions. [2022-07-22 09:53:27,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-07-22 09:53:27,760 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 09:53:27,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:27,762 INFO L225 Difference]: With dead ends: 807 [2022-07-22 09:53:27,762 INFO L226 Difference]: Without dead ends: 767 [2022-07-22 09:53:27,763 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 143 SyntacticMatches, 5 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11782 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3220, Invalid=30086, Unknown=0, NotChecked=0, Total=33306 [2022-07-22 09:53:27,764 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 634 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 3234 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 4428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 3234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 423 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:27,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 711 Invalid, 4428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 3234 Invalid, 0 Unknown, 423 Unchecked, 1.7s Time] [2022-07-22 09:53:27,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2022-07-22 09:53:27,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 444. [2022-07-22 09:53:27,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 1.1060948081264108) internal successors, (490), 443 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:27,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 490 transitions. [2022-07-22 09:53:27,834 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 490 transitions. Word has length 75 [2022-07-22 09:53:27,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:27,835 INFO L495 AbstractCegarLoop]: Abstraction has 444 states and 490 transitions. [2022-07-22 09:53:27,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.65) internal successors, (186), 40 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:27,835 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 490 transitions. [2022-07-22 09:53:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 09:53:27,836 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:27,836 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 6, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:27,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:28,043 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,SelfDestructingSolverStorable34 [2022-07-22 09:53:28,043 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:28,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:28,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1392331475, now seen corresponding path program 3 times [2022-07-22 09:53:28,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:28,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275457202] [2022-07-22 09:53:28,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:28,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:28,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:28,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275457202] [2022-07-22 09:53:28,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275457202] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:28,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854737576] [2022-07-22 09:53:28,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:53:28,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:28,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:28,199 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 09:53:28,207 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 09:53:28,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-07-22 09:53:28,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:28,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-22 09:53:28,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:28,417 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 16 treesize of output 12 [2022-07-22 09:53:28,434 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:53:28,434 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 29 treesize of output 28 [2022-07-22 09:53:29,020 INFO L356 Elim1Store]: treesize reduction 46, result has 6.1 percent of original size [2022-07-22 09:53:29,020 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 50 treesize of output 23 [2022-07-22 09:53:29,038 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:29,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:29,145 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 17 treesize of output 15 [2022-07-22 09:53:29,147 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 30 treesize of output 26 [2022-07-22 09:53:29,165 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:29,165 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854737576] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:29,165 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:29,166 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 29 [2022-07-22 09:53:29,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125131450] [2022-07-22 09:53:29,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:29,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-07-22 09:53:29,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:29,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-07-22 09:53:29,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2022-07-22 09:53:29,167 INFO L87 Difference]: Start difference. First operand 444 states and 490 transitions. Second operand has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:30,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:30,907 INFO L93 Difference]: Finished difference Result 793 states and 875 transitions. [2022-07-22 09:53:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-07-22 09:53:30,908 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 09:53:30,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:30,909 INFO L225 Difference]: With dead ends: 793 [2022-07-22 09:53:30,909 INFO L226 Difference]: Without dead ends: 791 [2022-07-22 09:53:30,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 146 SyntacticMatches, 6 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4716 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=974, Invalid=12136, Unknown=0, NotChecked=0, Total=13110 [2022-07-22 09:53:30,911 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 108 mSDsluCounter, 378 mSDsCounter, 0 mSdLazyCounter, 1389 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 2025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 1389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 500 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:30,911 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 417 Invalid, 2025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 1389 Invalid, 0 Unknown, 500 Unchecked, 0.6s Time] [2022-07-22 09:53:30,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 791 states. [2022-07-22 09:53:30,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 791 to 518. [2022-07-22 09:53:30,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 1.1121856866537718) internal successors, (575), 517 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:30,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 575 transitions. [2022-07-22 09:53:30,998 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 575 transitions. Word has length 75 [2022-07-22 09:53:30,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:30,998 INFO L495 AbstractCegarLoop]: Abstraction has 518 states and 575 transitions. [2022-07-22 09:53:30,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 4.862068965517241) internal successors, (141), 29 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:30,999 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 575 transitions. [2022-07-22 09:53:30,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-07-22 09:53:31,000 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:31,000 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 5, 4, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:31,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-07-22 09:53:31,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:31,211 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:31,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:31,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1785358485, now seen corresponding path program 4 times [2022-07-22 09:53:31,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:31,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040968114] [2022-07-22 09:53:31,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:31,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:31,366 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:31,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:31,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040968114] [2022-07-22 09:53:31,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040968114] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:31,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383483230] [2022-07-22 09:53:31,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:53:31,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:31,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:31,368 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 09:53:31,368 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 09:53:31,462 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:53:31,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 09:53:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:31,501 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 16 treesize of output 12 [2022-07-22 09:53:31,526 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-22 09:53:31,526 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 29 treesize of output 28 [2022-07-22 09:53:31,802 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:53:31,802 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-22 09:53:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:31,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:31,916 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 17 treesize of output 15 [2022-07-22 09:53:31,918 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 30 treesize of output 26 [2022-07-22 09:53:31,936 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:31,937 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383483230] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:31,937 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:31,937 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 26 [2022-07-22 09:53:31,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34852904] [2022-07-22 09:53:31,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:31,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-07-22 09:53:31,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-07-22 09:53:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2022-07-22 09:53:31,941 INFO L87 Difference]: Start difference. First operand 518 states and 575 transitions. Second operand has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:40,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:53:40,781 INFO L93 Difference]: Finished difference Result 1698 states and 1890 transitions. [2022-07-22 09:53:40,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 403 states. [2022-07-22 09:53:40,782 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2022-07-22 09:53:40,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:53:40,785 INFO L225 Difference]: With dead ends: 1698 [2022-07-22 09:53:40,785 INFO L226 Difference]: Without dead ends: 1696 [2022-07-22 09:53:40,809 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 134 SyntacticMatches, 8 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76503 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8462, Invalid=158410, Unknown=0, NotChecked=0, Total=166872 [2022-07-22 09:53:40,810 INFO L413 NwaCegarLoop]: 83 mSDtfsCounter, 652 mSDsluCounter, 879 mSDsCounter, 0 mSdLazyCounter, 5394 mSolverCounterSat, 588 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 962 SdHoareTripleChecker+Invalid, 5982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 588 IncrementalHoareTripleChecker+Valid, 5394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-07-22 09:53:40,810 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 962 Invalid, 5982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [588 Valid, 5394 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-07-22 09:53:40,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1696 states. [2022-07-22 09:53:40,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1696 to 512. [2022-07-22 09:53:40,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 511 states have (on average 1.111545988258317) internal successors, (568), 511 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:40,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 568 transitions. [2022-07-22 09:53:40,900 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 568 transitions. Word has length 75 [2022-07-22 09:53:40,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:53:40,900 INFO L495 AbstractCegarLoop]: Abstraction has 512 states and 568 transitions. [2022-07-22 09:53:40,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.115384615384615) internal successors, (133), 26 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:53:40,900 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 568 transitions. [2022-07-22 09:53:40,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-07-22 09:53:40,901 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:53:40,901 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:53:40,918 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 09:53:41,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:41,109 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:53:41,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:53:41,109 INFO L85 PathProgramCache]: Analyzing trace with hash 706101572, now seen corresponding path program 3 times [2022-07-22 09:53:41,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:53:41,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867833155] [2022-07-22 09:53:41,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:53:41,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:53:41,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:53:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:41,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:53:41,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867833155] [2022-07-22 09:53:41,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867833155] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:53:41,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411370615] [2022-07-22 09:53:41,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-22 09:53:41,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:53:41,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:53:41,256 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 09:53:41,256 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 09:53:41,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-07-22 09:53:41,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:53:41,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-22 09:53:41,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:53:41,477 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 16 treesize of output 12 [2022-07-22 09:53:41,831 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-22 09:53:41,831 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 20 [2022-07-22 09:53:41,847 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:41,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:53:41,938 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 17 treesize of output 15 [2022-07-22 09:53:41,939 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 30 treesize of output 26 [2022-07-22 09:53:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:53:41,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411370615] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:53:41,959 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:53:41,959 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 28 [2022-07-22 09:53:41,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550925482] [2022-07-22 09:53:41,959 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:53:41,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-22 09:53:41,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:53:41,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-22 09:53:41,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2022-07-22 09:53:41,960 INFO L87 Difference]: Start difference. First operand 512 states and 568 transitions. Second operand has 28 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:00,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:00,600 INFO L93 Difference]: Finished difference Result 2833 states and 3159 transitions. [2022-07-22 09:54:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 731 states. [2022-07-22 09:54:00,601 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2022-07-22 09:54:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:00,606 INFO L225 Difference]: With dead ends: 2833 [2022-07-22 09:54:00,606 INFO L226 Difference]: Without dead ends: 2831 [2022-07-22 09:54:00,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 891 GetRequests, 145 SyntacticMatches, 7 SemanticMatches, 739 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261134 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=18109, Invalid=530231, Unknown=0, NotChecked=0, Total=548340 [2022-07-22 09:54:00,631 INFO L413 NwaCegarLoop]: 130 mSDtfsCounter, 1015 mSDsluCounter, 1650 mSDsCounter, 0 mSdLazyCounter, 10421 mSolverCounterSat, 1004 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1780 SdHoareTripleChecker+Invalid, 11425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1004 IncrementalHoareTripleChecker+Valid, 10421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:00,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1780 Invalid, 11425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1004 Valid, 10421 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-07-22 09:54:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2831 states. [2022-07-22 09:54:00,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2831 to 462. [2022-07-22 09:54:00,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 1.1062906724511932) internal successors, (510), 461 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:00,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 510 transitions. [2022-07-22 09:54:00,733 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 510 transitions. Word has length 81 [2022-07-22 09:54:00,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:00,733 INFO L495 AbstractCegarLoop]: Abstraction has 462 states and 510 transitions. [2022-07-22 09:54:00,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.107142857142857) internal successors, (143), 28 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:00,733 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 510 transitions. [2022-07-22 09:54:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-07-22 09:54:00,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:00,734 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:00,757 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 09:54:00,947 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,SelfDestructingSolverStorable37 [2022-07-22 09:54:00,947 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:00,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:00,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1667229289, now seen corresponding path program 10 times [2022-07-22 09:54:00,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:00,948 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613215004] [2022-07-22 09:54:00,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:00,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:00,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:01,238 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 255 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:01,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:01,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613215004] [2022-07-22 09:54:01,239 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613215004] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:01,239 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096476039] [2022-07-22 09:54:01,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-22 09:54:01,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:01,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:01,240 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 09:54:01,240 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 09:54:01,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-22 09:54:01,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:01,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 18 conjunts are in the unsatisfiable core [2022-07-22 09:54:01,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 310 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:01,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:02,387 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 310 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:02,388 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096476039] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-22 09:54:02,388 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-22 09:54:02,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 18] total 52 [2022-07-22 09:54:02,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473869486] [2022-07-22 09:54:02,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-22 09:54:02,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-07-22 09:54:02,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 09:54:02,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-07-22 09:54:02,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=1986, Unknown=0, NotChecked=0, Total=2652 [2022-07-22 09:54:02,389 INFO L87 Difference]: Start difference. First operand 462 states and 510 transitions. Second operand has 52 states, 52 states have (on average 4.788461538461538) internal successors, (249), 52 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:02,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 09:54:02,872 INFO L93 Difference]: Finished difference Result 829 states and 909 transitions. [2022-07-22 09:54:02,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-22 09:54:02,873 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 4.788461538461538) internal successors, (249), 52 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2022-07-22 09:54:02,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 09:54:02,874 INFO L225 Difference]: With dead ends: 829 [2022-07-22 09:54:02,874 INFO L226 Difference]: Without dead ends: 526 [2022-07-22 09:54:02,875 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1245 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=834, Invalid=2588, Unknown=0, NotChecked=0, Total=3422 [2022-07-22 09:54:02,875 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 440 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 355 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-22 09:54:02,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 355 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-22 09:54:02,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-07-22 09:54:02,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 484. [2022-07-22 09:54:02,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 1.0973084886128364) internal successors, (530), 483 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:02,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 530 transitions. [2022-07-22 09:54:02,961 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 530 transitions. Word has length 87 [2022-07-22 09:54:02,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 09:54:02,961 INFO L495 AbstractCegarLoop]: Abstraction has 484 states and 530 transitions. [2022-07-22 09:54:02,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 4.788461538461538) internal successors, (249), 52 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 09:54:02,961 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 530 transitions. [2022-07-22 09:54:02,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-07-22 09:54:02,962 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 09:54:02,962 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 09:54:02,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-07-22 09:54:03,175 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,SelfDestructingSolverStorable38 [2022-07-22 09:54:03,175 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 09:54:03,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 09:54:03,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1528143710, now seen corresponding path program 11 times [2022-07-22 09:54:03,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 09:54:03,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307772876] [2022-07-22 09:54:03,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 09:54:03,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 09:54:03,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 09:54:03,539 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 20 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:03,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 09:54:03,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307772876] [2022-07-22 09:54:03,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307772876] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-22 09:54:03,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088703457] [2022-07-22 09:54:03,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-22 09:54:03,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-22 09:54:03,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 09:54:03,540 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 09:54:03,550 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 09:54:03,879 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2022-07-22 09:54:03,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-22 09:54:03,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-22 09:54:03,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-22 09:54:03,965 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 16 treesize of output 12 [2022-07-22 09:54:04,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:54:04,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,032 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:54:04,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,040 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:54:04,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,048 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:54:04,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,056 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:54:04,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 25 [2022-07-22 09:54:04,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,128 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:54:04,128 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-07-22 09:54:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,140 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:54:04,140 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-07-22 09:54:04,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,151 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:54:04,151 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 40 [2022-07-22 09:54:04,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-22 09:54:04,161 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:54:04,161 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 34 [2022-07-22 09:54:04,939 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-22 09:54:04,939 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2022-07-22 09:54:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 20 proven. 314 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 09:54:04,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-22 09:54:28,156 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1374 Int) (v_ArrVal_1376 Int) (v_ArrVal_1386 Int) (v_ArrVal_1379 Int)) (or (not (<= |c_ULTIMATE.start_main_~CCCELVOL5~0#1| v_ArrVal_1379)) (let ((.cse0 (let ((.cse1 (* 20 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (- 8)) v_ArrVal_1374) (+ (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_1376) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_1379) (+ 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_1386)))) (<= (select .cse0 (+ 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (select .cse0 (+ 40 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)))))) is different from false [2022-07-22 09:54:30,190 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1372 Int) (v_ArrVal_1374 Int) (v_ArrVal_1376 Int) (v_ArrVal_1386 Int) (v_ArrVal_1379 Int)) (or (let ((.cse0 (let ((.cse1 (* 20 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ (- 12) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_1372) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (- 8)) v_ArrVal_1374) (+ (- 4) |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_1376) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_1379) (+ 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_1386)))) (<= (select .cse0 (+ 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (select .cse0 (+ 40 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)))) (not (<= |c_ULTIMATE.start_main_~CCCELVOL5~0#1| v_ArrVal_1379)))) is different from false [2022-07-22 09:54:40,651 WARN L833 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1376 Int) (v_ArrVal_1386 Int) (v_ArrVal_1369 Int) (v_ArrVal_1379 Int)) (or (let ((.cse0 (let ((.cse1 (* 20 |c_ULTIMATE.start_main_~i~0#1|))) (store (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_1369) (+ 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) v_ArrVal_1376) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20 .cse1) v_ArrVal_1379) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 36 .cse1) v_ArrVal_1386)))) (<= (select .cse0 (+ 16 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (select .cse0 (+ 40 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)))) (not (<= |c_ULTIMATE.start_main_~CCCELVOL5~0#1| v_ArrVal_1379)))) is different from false [2022-07-22 09:54:40,661 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 93 treesize of output 89 [2022-07-22 09:54:40,702 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-22 09:54:40,703 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 25098198 treesize of output 24836054