./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-tiling/pr3.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6c24879c 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/pr3.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 73efddcda095c52d9900d13088d1ec70520de6007541f46343a568e878cf2ed4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-6c24879 [2022-07-11 22:26:27,651 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-11 22:26:27,652 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-11 22:26:27,683 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-11 22:26:27,683 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-11 22:26:27,684 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-11 22:26:27,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-11 22:26:27,692 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-11 22:26:27,693 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-11 22:26:27,693 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-11 22:26:27,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-11 22:26:27,694 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-11 22:26:27,695 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-11 22:26:27,695 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-11 22:26:27,696 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-11 22:26:27,697 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-11 22:26:27,697 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-11 22:26:27,698 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-11 22:26:27,701 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-11 22:26:27,702 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-11 22:26:27,705 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-11 22:26:27,707 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-11 22:26:27,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-11 22:26:27,710 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-11 22:26:27,711 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-11 22:26:27,713 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-11 22:26:27,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-11 22:26:27,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-11 22:26:27,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-11 22:26:27,714 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-11 22:26:27,715 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-11 22:26:27,715 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-11 22:26:27,715 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-11 22:26:27,716 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-11 22:26:27,716 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-11 22:26:27,717 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-11 22:26:27,717 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-11 22:26:27,718 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-11 22:26:27,718 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-11 22:26:27,719 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-11 22:26:27,719 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-11 22:26:27,721 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-11 22:26:27,722 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-11 22:26:27,746 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-11 22:26:27,746 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-11 22:26:27,746 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-11 22:26:27,747 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-11 22:26:27,747 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-11 22:26:27,747 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-11 22:26:27,748 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-11 22:26:27,748 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-11 22:26:27,748 INFO L138 SettingsManager]: * Use SBE=true [2022-07-11 22:26:27,749 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-11 22:26:27,749 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-11 22:26:27,749 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-11 22:26:27,749 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-11 22:26:27,749 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-11 22:26:27,750 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-11 22:26:27,750 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-11 22:26:27,750 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-11 22:26:27,750 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-11 22:26:27,750 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-11 22:26:27,750 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-11 22:26:27,750 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-11 22:26:27,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-11 22:26:27,752 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-11 22:26:27,752 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-11 22:26:27,752 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:26:27,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-11 22:26:27,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-11 22:26:27,753 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-11 22:26:27,753 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-11 22:26:27,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-11 22:26:27,753 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-11 22:26:27,754 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-11 22:26:27,754 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-11 22:26:27,754 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73efddcda095c52d9900d13088d1ec70520de6007541f46343a568e878cf2ed4 [2022-07-11 22:26:27,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-11 22:26:27,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-11 22:26:27,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-11 22:26:27,951 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-11 22:26:27,952 INFO L275 PluginConnector]: CDTParser initialized [2022-07-11 22:26:27,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-tiling/pr3.c [2022-07-11 22:26:28,011 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9affc0a4d/215f52bae240498daef7e9bbffb2f24f/FLAG4318ac994 [2022-07-11 22:26:28,401 INFO L306 CDTParser]: Found 1 translation units. [2022-07-11 22:26:28,402 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-tiling/pr3.c [2022-07-11 22:26:28,407 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9affc0a4d/215f52bae240498daef7e9bbffb2f24f/FLAG4318ac994 [2022-07-11 22:26:28,422 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9affc0a4d/215f52bae240498daef7e9bbffb2f24f [2022-07-11 22:26:28,425 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-11 22:26:28,426 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-11 22:26:28,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-11 22:26:28,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-11 22:26:28,430 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-11 22:26:28,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,431 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a03d9a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28, skipping insertion in model container [2022-07-11 22:26:28,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-11 22:26:28,445 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-11 22:26:28,592 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/pr3.c[394,407] [2022-07-11 22:26:28,617 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:26:28,627 INFO L203 MainTranslator]: Completed pre-run [2022-07-11 22:26:28,639 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/pr3.c[394,407] [2022-07-11 22:26:28,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-11 22:26:28,665 INFO L208 MainTranslator]: Completed translation [2022-07-11 22:26:28,666 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28 WrapperNode [2022-07-11 22:26:28,666 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-11 22:26:28,667 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-11 22:26:28,667 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-11 22:26:28,668 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-11 22:26:28,673 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,685 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,705 INFO L137 Inliner]: procedures = 15, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2022-07-11 22:26:28,705 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-11 22:26:28,706 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-11 22:26:28,706 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-11 22:26:28,706 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-11 22:26:28,712 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,716 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,716 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,726 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,730 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,736 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,739 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-11 22:26:28,741 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-11 22:26:28,741 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-11 22:26:28,742 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-11 22:26:28,742 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (1/1) ... [2022-07-11 22:26:28,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-11 22:26:28,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:28,772 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) [2022-07-11 22:26:28,790 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 [2022-07-11 22:26:28,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-11 22:26:28,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-11 22:26:28,803 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-11 22:26:28,803 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-11 22:26:28,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-11 22:26:28,804 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-11 22:26:28,804 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-11 22:26:28,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-11 22:26:28,854 INFO L234 CfgBuilder]: Building ICFG [2022-07-11 22:26:28,855 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-11 22:26:29,035 INFO L275 CfgBuilder]: Performing block encoding [2022-07-11 22:26:29,039 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-11 22:26:29,051 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-07-11 22:26:29,053 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:26:29 BoogieIcfgContainer [2022-07-11 22:26:29,053 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-11 22:26:29,054 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-11 22:26:29,054 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-11 22:26:29,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-11 22:26:29,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.07 10:26:28" (1/3) ... [2022-07-11 22:26:29,057 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd4134b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:26:29, skipping insertion in model container [2022-07-11 22:26:29,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.07 10:26:28" (2/3) ... [2022-07-11 22:26:29,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fd4134b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.07 10:26:29, skipping insertion in model container [2022-07-11 22:26:29,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.07 10:26:29" (3/3) ... [2022-07-11 22:26:29,059 INFO L111 eAbstractionObserver]: Analyzing ICFG pr3.c [2022-07-11 22:26:29,068 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-11 22:26:29,068 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-11 22:26:29,102 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-11 22:26:29,109 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@25d4fe83, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@1460232b [2022-07-11 22:26:29,110 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-11 22:26:29,114 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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) [2022-07-11 22:26:29,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-11 22:26:29,119 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:29,119 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:29,120 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:29,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:29,124 INFO L85 PathProgramCache]: Analyzing trace with hash -405965127, now seen corresponding path program 1 times [2022-07-11 22:26:29,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:29,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480931849] [2022-07-11 22:26:29,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:29,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:29,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:29,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:29,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:29,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480931849] [2022-07-11 22:26:29,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480931849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:26:29,237 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:26:29,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-11 22:26:29,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411440623] [2022-07-11 22:26:29,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:26:29,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-11 22:26:29,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:29,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-11 22:26:29,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-11 22:26:29,276 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 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) [2022-07-11 22:26:29,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:29,287 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2022-07-11 22:26:29,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-11 22:26:29,289 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 [2022-07-11 22:26:29,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:29,295 INFO L225 Difference]: With dead ends: 45 [2022-07-11 22:26:29,295 INFO L226 Difference]: Without dead ends: 20 [2022-07-11 22:26:29,297 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 [2022-07-11 22:26:29,301 INFO L413 NwaCegarLoop]: 32 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, 32 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 [2022-07-11 22:26:29,302 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:26:29,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-07-11 22:26:29,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-07-11 22:26:29,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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) [2022-07-11 22:26:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-07-11 22:26:29,336 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 13 [2022-07-11 22:26:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:29,336 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-07-11 22:26:29,336 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) [2022-07-11 22:26:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-07-11 22:26:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-11 22:26:29,337 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:29,337 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:29,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-11 22:26:29,337 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:29,338 INFO L85 PathProgramCache]: Analyzing trace with hash 274093243, now seen corresponding path program 1 times [2022-07-11 22:26:29,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:29,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797599864] [2022-07-11 22:26:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:29,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:29,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:29,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:29,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797599864] [2022-07-11 22:26:29,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797599864] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:26:29,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:26:29,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:26:29,392 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307966479] [2022-07-11 22:26:29,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:26:29,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:26:29,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:26:29,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:26:29,394 INFO L87 Difference]: Start difference. First operand 20 states and 25 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) [2022-07-11 22:26:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:29,419 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2022-07-11 22:26:29,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 22:26:29,419 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 [2022-07-11 22:26:29,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:29,420 INFO L225 Difference]: With dead ends: 29 [2022-07-11 22:26:29,420 INFO L226 Difference]: Without dead ends: 27 [2022-07-11 22:26:29,420 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 [2022-07-11 22:26:29,421 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 65 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 [2022-07-11 22:26:29,422 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 65 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:26:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-11 22:26:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2022-07-11 22:26:29,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 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) [2022-07-11 22:26:29,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-07-11 22:26:29,425 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2022-07-11 22:26:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:29,426 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-07-11 22:26:29,426 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) [2022-07-11 22:26:29,426 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-07-11 22:26:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-11 22:26:29,426 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:29,427 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:29,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-11 22:26:29,427 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:29,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:29,434 INFO L85 PathProgramCache]: Analyzing trace with hash 274152825, now seen corresponding path program 1 times [2022-07-11 22:26:29,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:29,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049048128] [2022-07-11 22:26:29,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:29,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:29,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:29,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:29,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049048128] [2022-07-11 22:26:29,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049048128] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:26:29,575 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:26:29,575 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-07-11 22:26:29,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795188036] [2022-07-11 22:26:29,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:26:29,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-07-11 22:26:29,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:29,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-07-11 22:26:29,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2022-07-11 22:26:29,577 INFO L87 Difference]: Start difference. First operand 22 states and 27 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) [2022-07-11 22:26:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:29,646 INFO L93 Difference]: Finished difference Result 38 states and 48 transitions. [2022-07-11 22:26:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-11 22:26:29,647 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 [2022-07-11 22:26:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:29,648 INFO L225 Difference]: With dead ends: 38 [2022-07-11 22:26:29,648 INFO L226 Difference]: Without dead ends: 27 [2022-07-11 22:26:29,648 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 [2022-07-11 22:26:29,649 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:29,649 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 21 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:26:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-11 22:26:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2022-07-11 22:26:29,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 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) [2022-07-11 22:26:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-07-11 22:26:29,653 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 13 [2022-07-11 22:26:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:29,653 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-07-11 22:26:29,653 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) [2022-07-11 22:26:29,653 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-07-11 22:26:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-11 22:26:29,654 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:29,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:29,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-11 22:26:29,655 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:29,656 INFO L85 PathProgramCache]: Analyzing trace with hash 40395978, now seen corresponding path program 1 times [2022-07-11 22:26:29,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:29,658 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942233598] [2022-07-11 22:26:29,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:29,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:29,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:29,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:29,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:29,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942233598] [2022-07-11 22:26:29,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942233598] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:29,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866635074] [2022-07-11 22:26:29,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:29,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:29,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:29,860 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) [2022-07-11 22:26:29,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-11 22:26:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:29,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-11 22:26:29,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:30,004 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 [2022-07-11 22:26:30,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:30,027 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 [2022-07-11 22:26:30,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:30,040 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 21 treesize of output 20 [2022-07-11 22:26:30,083 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 [2022-07-11 22:26:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:30,098 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:30,186 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 [2022-07-11 22:26:30,189 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 [2022-07-11 22:26:30,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:30,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866635074] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:30,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:30,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 6] total 18 [2022-07-11 22:26:30,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128138907] [2022-07-11 22:26:30,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:30,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-11 22:26:30,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:30,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-11 22:26:30,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-07-11 22:26:30,207 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2022-07-11 22:26:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:30,719 INFO L93 Difference]: Finished difference Result 112 states and 137 transitions. [2022-07-11 22:26:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-07-11 22:26:30,720 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) Word has length 18 [2022-07-11 22:26:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:30,721 INFO L225 Difference]: With dead ends: 112 [2022-07-11 22:26:30,721 INFO L226 Difference]: Without dead ends: 102 [2022-07-11 22:26:30,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=308, Invalid=952, Unknown=0, NotChecked=0, Total=1260 [2022-07-11 22:26:30,723 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 240 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:30,723 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 114 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:26:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-07-11 22:26:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 31. [2022-07-11 22:26:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 30 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) [2022-07-11 22:26:30,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-07-11 22:26:30,733 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 18 [2022-07-11 22:26:30,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:30,733 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-07-11 22:26:30,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 18 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) [2022-07-11 22:26:30,734 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-07-11 22:26:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-11 22:26:30,734 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:30,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:30,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:30,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:30,952 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash 741460556, now seen corresponding path program 1 times [2022-07-11 22:26:30,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:30,952 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094507161] [2022-07-11 22:26:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:30,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:30,987 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:30,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:30,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094507161] [2022-07-11 22:26:30,988 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094507161] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:26:30,988 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:26:30,988 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:26:30,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975766951] [2022-07-11 22:26:30,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:26:30,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:26:30,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:30,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:26:30,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:26:30,990 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-11 22:26:31,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:31,011 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2022-07-11 22:26:31,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:26:31,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2022-07-11 22:26:31,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:31,012 INFO L225 Difference]: With dead ends: 57 [2022-07-11 22:26:31,012 INFO L226 Difference]: Without dead ends: 41 [2022-07-11 22:26:31,012 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 [2022-07-11 22:26:31,013 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:31,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:26:31,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-11 22:26:31,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2022-07-11 22:26:31,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.3) internal successors, (39), 30 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) [2022-07-11 22:26:31,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 39 transitions. [2022-07-11 22:26:31,017 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 39 transitions. Word has length 18 [2022-07-11 22:26:31,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:31,017 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 39 transitions. [2022-07-11 22:26:31,018 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-11 22:26:31,018 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 39 transitions. [2022-07-11 22:26:31,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-11 22:26:31,018 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:31,018 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:31,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-11 22:26:31,019 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:31,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:31,019 INFO L85 PathProgramCache]: Analyzing trace with hash 1421518926, now seen corresponding path program 1 times [2022-07-11 22:26:31,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:31,019 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941451849] [2022-07-11 22:26:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:31,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:31,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:31,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:31,049 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941451849] [2022-07-11 22:26:31,049 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941451849] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:26:31,049 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:26:31,049 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:26:31,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034467536] [2022-07-11 22:26:31,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:26:31,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:26:31,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:31,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:26:31,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:26:31,051 INFO L87 Difference]: Start difference. First operand 31 states and 39 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-11 22:26:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:31,070 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2022-07-11 22:26:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:26:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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 18 [2022-07-11 22:26:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:31,071 INFO L225 Difference]: With dead ends: 57 [2022-07-11 22:26:31,071 INFO L226 Difference]: Without dead ends: 41 [2022-07-11 22:26:31,071 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 [2022-07-11 22:26:31,072 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 37 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:31,072 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:26:31,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-07-11 22:26:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 31. [2022-07-11 22:26:31,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 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) [2022-07-11 22:26:31,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 38 transitions. [2022-07-11 22:26:31,076 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 38 transitions. Word has length 18 [2022-07-11 22:26:31,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:31,076 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 38 transitions. [2022-07-11 22:26:31,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 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) [2022-07-11 22:26:31,076 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 38 transitions. [2022-07-11 22:26:31,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-11 22:26:31,077 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:31,077 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:31,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-07-11 22:26:31,077 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:31,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:31,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1028491916, now seen corresponding path program 1 times [2022-07-11 22:26:31,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:31,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873868342] [2022-07-11 22:26:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:31,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:31,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:31,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:31,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873868342] [2022-07-11 22:26:31,190 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873868342] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:31,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586279185] [2022-07-11 22:26:31,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:31,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:31,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:31,192 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) [2022-07-11 22:26:31,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-11 22:26:31,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:31,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-11 22:26:31,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:31,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2022-07-11 22:26:31,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:31,259 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 [2022-07-11 22:26:31,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:31,282 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 [2022-07-11 22:26:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:31,328 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:31,389 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 [2022-07-11 22:26:31,391 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 [2022-07-11 22:26:31,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:31,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586279185] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:31,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:31,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 14 [2022-07-11 22:26:31,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938309076] [2022-07-11 22:26:31,403 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:31,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-11 22:26:31,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:31,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-11 22:26:31,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2022-07-11 22:26:31,404 INFO L87 Difference]: Start difference. First operand 31 states and 38 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-07-11 22:26:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:31,697 INFO L93 Difference]: Finished difference Result 94 states and 113 transitions. [2022-07-11 22:26:31,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-07-11 22:26:31,698 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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 18 [2022-07-11 22:26:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:31,698 INFO L225 Difference]: With dead ends: 94 [2022-07-11 22:26:31,698 INFO L226 Difference]: Without dead ends: 92 [2022-07-11 22:26:31,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2022-07-11 22:26:31,700 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 125 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 248 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:31,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 118 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 248 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:26:31,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-07-11 22:26:31,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 40. [2022-07-11 22:26:31,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 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) [2022-07-11 22:26:31,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 51 transitions. [2022-07-11 22:26:31,705 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 51 transitions. Word has length 18 [2022-07-11 22:26:31,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:31,706 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 51 transitions. [2022-07-11 22:26:31,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 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) [2022-07-11 22:26:31,706 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 51 transitions. [2022-07-11 22:26:31,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-11 22:26:31,706 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:31,707 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] [2022-07-11 22:26:31,727 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:31,919 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 [2022-07-11 22:26:31,921 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:31,922 INFO L85 PathProgramCache]: Analyzing trace with hash 85282267, now seen corresponding path program 1 times [2022-07-11 22:26:31,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:31,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499302970] [2022-07-11 22:26:31,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:31,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:31,952 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:31,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:31,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499302970] [2022-07-11 22:26:31,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499302970] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:26:31,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:26:31,953 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:26:31,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938416834] [2022-07-11 22:26:31,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:26:31,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:26:31,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:31,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:26:31,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:26:31,954 INFO L87 Difference]: Start difference. First operand 40 states and 51 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-07-11 22:26:31,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:31,965 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2022-07-11 22:26:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:26:31,965 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2022-07-11 22:26:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:31,966 INFO L225 Difference]: With dead ends: 66 [2022-07-11 22:26:31,966 INFO L226 Difference]: Without dead ends: 50 [2022-07-11 22:26:31,966 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 [2022-07-11 22:26:31,967 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:31,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 38 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:26:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-07-11 22:26:31,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 40. [2022-07-11 22:26:31,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.2564102564102564) internal successors, (49), 39 states have internal predecessors, (49), 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) [2022-07-11 22:26:31,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 49 transitions. [2022-07-11 22:26:31,971 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 49 transitions. Word has length 23 [2022-07-11 22:26:31,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:31,971 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 49 transitions. [2022-07-11 22:26:31,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-07-11 22:26:31,972 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 49 transitions. [2022-07-11 22:26:31,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-07-11 22:26:31,972 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:31,972 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:31,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-11 22:26:31,973 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:31,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:31,973 INFO L85 PathProgramCache]: Analyzing trace with hash 367135703, now seen corresponding path program 1 times [2022-07-11 22:26:31,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:31,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085508187] [2022-07-11 22:26:31,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:31,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:31,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:31,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:31,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085508187] [2022-07-11 22:26:31,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085508187] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:26:31,990 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:26:31,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:26:31,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045914734] [2022-07-11 22:26:31,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:26:31,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:26:31,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:31,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:26:31,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:26:31,991 INFO L87 Difference]: Start difference. First operand 40 states and 49 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-07-11 22:26:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:32,002 INFO L93 Difference]: Finished difference Result 60 states and 71 transitions. [2022-07-11 22:26:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:26:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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 23 [2022-07-11 22:26:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:32,002 INFO L225 Difference]: With dead ends: 60 [2022-07-11 22:26:32,003 INFO L226 Difference]: Without dead ends: 44 [2022-07-11 22:26:32,003 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 [2022-07-11 22:26:32,003 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 11 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:32,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:26:32,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-07-11 22:26:32,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 34. [2022-07-11 22:26:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 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) [2022-07-11 22:26:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-07-11 22:26:32,007 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-07-11 22:26:32,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:32,008 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-07-11 22:26:32,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 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) [2022-07-11 22:26:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-07-11 22:26:32,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-11 22:26:32,008 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:32,008 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] [2022-07-11 22:26:32,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-07-11 22:26:32,009 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:32,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:32,009 INFO L85 PathProgramCache]: Analyzing trace with hash -340290083, now seen corresponding path program 1 times [2022-07-11 22:26:32,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:32,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659866679] [2022-07-11 22:26:32,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:32,146 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:32,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:32,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659866679] [2022-07-11 22:26:32,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659866679] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:32,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550627944] [2022-07-11 22:26:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:32,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:32,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:32,148 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) [2022-07-11 22:26:32,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-11 22:26:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:32,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 17 conjunts are in the unsatisfiable core [2022-07-11 22:26:32,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:32,218 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 [2022-07-11 22:26:32,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:32,240 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 23 treesize of output 22 [2022-07-11 22:26:32,300 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 [2022-07-11 22:26:32,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:32,309 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:32,384 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2022-07-11 22:26:32,389 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 [2022-07-11 22:26:32,401 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:32,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550627944] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:32,402 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:32,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 20 [2022-07-11 22:26:32,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219004552] [2022-07-11 22:26:32,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:32,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 22:26:32,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:32,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 22:26:32,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:26:32,406 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 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) [2022-07-11 22:26:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:32,801 INFO L93 Difference]: Finished difference Result 121 states and 145 transitions. [2022-07-11 22:26:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-07-11 22:26:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 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 24 [2022-07-11 22:26:32,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:32,802 INFO L225 Difference]: With dead ends: 121 [2022-07-11 22:26:32,802 INFO L226 Difference]: Without dead ends: 111 [2022-07-11 22:26:32,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2022-07-11 22:26:32,803 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 162 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:32,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 128 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:26:32,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-07-11 22:26:32,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 46. [2022-07-11 22:26:32,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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) [2022-07-11 22:26:32,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 56 transitions. [2022-07-11 22:26:32,808 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 56 transitions. Word has length 24 [2022-07-11 22:26:32,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:32,808 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 56 transitions. [2022-07-11 22:26:32,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 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) [2022-07-11 22:26:32,808 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 56 transitions. [2022-07-11 22:26:32,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-11 22:26:32,809 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:32,809 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] [2022-07-11 22:26:32,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:33,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:33,009 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:33,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:33,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1361358437, now seen corresponding path program 1 times [2022-07-11 22:26:33,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:33,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378062074] [2022-07-11 22:26:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:33,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:33,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 22:26:33,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:33,048 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378062074] [2022-07-11 22:26:33,048 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378062074] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:26:33,048 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:26:33,048 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-11 22:26:33,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003734127] [2022-07-11 22:26:33,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:26:33,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-11 22:26:33,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-11 22:26:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-11 22:26:33,050 INFO L87 Difference]: Start difference. First operand 46 states and 56 transitions. Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-07-11 22:26:33,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:33,073 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2022-07-11 22:26:33,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-11 22:26:33,073 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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 24 [2022-07-11 22:26:33,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:33,074 INFO L225 Difference]: With dead ends: 77 [2022-07-11 22:26:33,074 INFO L226 Difference]: Without dead ends: 59 [2022-07-11 22:26:33,075 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 [2022-07-11 22:26:33,075 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 36 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:33,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 47 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:26:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-07-11 22:26:33,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 46. [2022-07-11 22:26:33,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2) internal successors, (54), 45 states have internal predecessors, (54), 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) [2022-07-11 22:26:33,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2022-07-11 22:26:33,087 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 24 [2022-07-11 22:26:33,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:33,088 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2022-07-11 22:26:33,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 4 states have internal predecessors, (22), 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) [2022-07-11 22:26:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2022-07-11 22:26:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-11 22:26:33,091 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:33,091 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] [2022-07-11 22:26:33,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-07-11 22:26:33,091 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:33,092 INFO L85 PathProgramCache]: Analyzing trace with hash 1653745181, now seen corresponding path program 1 times [2022-07-11 22:26:33,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:33,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786250197] [2022-07-11 22:26:33,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:33,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:33,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:33,216 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:33,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:33,216 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786250197] [2022-07-11 22:26:33,217 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786250197] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:33,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579594284] [2022-07-11 22:26:33,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:33,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:33,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:33,218 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) [2022-07-11 22:26:33,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-11 22:26:33,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:33,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 22 conjunts are in the unsatisfiable core [2022-07-11 22:26:33,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:33,276 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 [2022-07-11 22:26:33,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:26:33,284 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 [2022-07-11 22:26:33,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:33,338 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:33,408 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 17 treesize of output 15 [2022-07-11 22:26:33,410 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 [2022-07-11 22:26:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:33,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579594284] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:33,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:33,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 15 [2022-07-11 22:26:33,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064094018] [2022-07-11 22:26:33,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:33,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-07-11 22:26:33,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:33,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-07-11 22:26:33,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2022-07-11 22:26:33,425 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2022-07-11 22:26:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:33,840 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2022-07-11 22:26:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-07-11 22:26:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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 24 [2022-07-11 22:26:33,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:33,841 INFO L225 Difference]: With dead ends: 128 [2022-07-11 22:26:33,841 INFO L226 Difference]: Without dead ends: 126 [2022-07-11 22:26:33,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 38 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=911, Unknown=0, NotChecked=0, Total=1190 [2022-07-11 22:26:33,842 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 353 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:33,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 140 Invalid, 393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 353 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:26:33,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-07-11 22:26:33,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 61. [2022-07-11 22:26:33,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.2) internal successors, (72), 60 states have internal predecessors, (72), 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) [2022-07-11 22:26:33,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 72 transitions. [2022-07-11 22:26:33,848 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 72 transitions. Word has length 24 [2022-07-11 22:26:33,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:33,849 INFO L495 AbstractCegarLoop]: Abstraction has 61 states and 72 transitions. [2022-07-11 22:26:33,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 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) [2022-07-11 22:26:33,849 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 72 transitions. [2022-07-11 22:26:33,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-07-11 22:26:33,849 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:33,849 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:33,868 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-07-11 22:26:34,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:34,066 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:34,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:34,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1421348308, now seen corresponding path program 1 times [2022-07-11 22:26:34,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:34,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641374811] [2022-07-11 22:26:34,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:34,083 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-11 22:26:34,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:34,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641374811] [2022-07-11 22:26:34,084 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641374811] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:26:34,084 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:26:34,084 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:26:34,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347411363] [2022-07-11 22:26:34,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:26:34,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:26:34,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:34,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:26:34,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:26:34,085 INFO L87 Difference]: Start difference. First operand 61 states and 72 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) [2022-07-11 22:26:34,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:34,098 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2022-07-11 22:26:34,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:26:34,099 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 29 [2022-07-11 22:26:34,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:34,101 INFO L225 Difference]: With dead ends: 83 [2022-07-11 22:26:34,101 INFO L226 Difference]: Without dead ends: 65 [2022-07-11 22:26:34,101 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 [2022-07-11 22:26:34,102 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:34,102 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 40 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:26:34,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-07-11 22:26:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 55. [2022-07-11 22:26:34,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 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) [2022-07-11 22:26:34,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2022-07-11 22:26:34,107 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 29 [2022-07-11 22:26:34,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:34,108 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2022-07-11 22:26:34,108 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) [2022-07-11 22:26:34,108 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2022-07-11 22:26:34,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-07-11 22:26:34,108 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:34,108 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] [2022-07-11 22:26:34,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-07-11 22:26:34,109 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:34,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:34,109 INFO L85 PathProgramCache]: Analyzing trace with hash 1546939568, now seen corresponding path program 2 times [2022-07-11 22:26:34,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:34,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806169623] [2022-07-11 22:26:34,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:34,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:34,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:34,234 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:34,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:34,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806169623] [2022-07-11 22:26:34,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806169623] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:34,234 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161360684] [2022-07-11 22:26:34,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:26:34,235 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:34,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:34,249 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) [2022-07-11 22:26:34,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-11 22:26:34,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:26:34,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:34,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 23 conjunts are in the unsatisfiable core [2022-07-11 22:26:34,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:34,319 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 [2022-07-11 22:26:34,464 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:34,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:34,608 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 [2022-07-11 22:26:34,612 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 [2022-07-11 22:26:34,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:34,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161360684] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:34,627 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:34,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 22 [2022-07-11 22:26:34,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863959168] [2022-07-11 22:26:34,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:34,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-11 22:26:34,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:34,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-11 22:26:34,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2022-07-11 22:26:34,629 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 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) [2022-07-11 22:26:35,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:35,718 INFO L93 Difference]: Finished difference Result 197 states and 230 transitions. [2022-07-11 22:26:35,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-11 22:26:35,718 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 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 30 [2022-07-11 22:26:35,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:35,719 INFO L225 Difference]: With dead ends: 197 [2022-07-11 22:26:35,719 INFO L226 Difference]: Without dead ends: 173 [2022-07-11 22:26:35,720 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1000 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=592, Invalid=3190, Unknown=0, NotChecked=0, Total=3782 [2022-07-11 22:26:35,721 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 350 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 452 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:35,721 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 106 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 22:26:35,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-07-11 22:26:35,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 82. [2022-07-11 22:26:35,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.1604938271604939) internal successors, (94), 81 states have internal predecessors, (94), 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) [2022-07-11 22:26:35,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2022-07-11 22:26:35,729 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 30 [2022-07-11 22:26:35,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:35,730 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2022-07-11 22:26:35,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 22 states have internal predecessors, (75), 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) [2022-07-11 22:26:35,730 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2022-07-11 22:26:35,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-07-11 22:26:35,731 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:35,731 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] [2022-07-11 22:26:35,764 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:35,966 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,SelfDestructingSolverStorable13 [2022-07-11 22:26:35,966 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:35,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1896113853, now seen corresponding path program 3 times [2022-07-11 22:26:35,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:35,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795363699] [2022-07-11 22:26:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:35,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:36,148 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:36,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:36,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795363699] [2022-07-11 22:26:36,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795363699] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:36,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809383129] [2022-07-11 22:26:36,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:26:36,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:36,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:36,150 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) [2022-07-11 22:26:36,156 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-11 22:26:36,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-07-11 22:26:36,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:36,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjunts are in the unsatisfiable core [2022-07-11 22:26:36,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:36,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:36,605 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 30 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:36,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809383129] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:36,605 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:36,606 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 28 [2022-07-11 22:26:36,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046505351] [2022-07-11 22:26:36,606 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:36,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-07-11 22:26:36,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:36,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-07-11 22:26:36,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=561, Unknown=0, NotChecked=0, Total=756 [2022-07-11 22:26:36,607 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 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) [2022-07-11 22:26:36,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:36,806 INFO L93 Difference]: Finished difference Result 166 states and 187 transitions. [2022-07-11 22:26:36,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-07-11 22:26:36,806 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 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 36 [2022-07-11 22:26:36,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:36,807 INFO L225 Difference]: With dead ends: 166 [2022-07-11 22:26:36,807 INFO L226 Difference]: Without dead ends: 109 [2022-07-11 22:26:36,808 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2022-07-11 22:26:36,808 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 189 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:36,808 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 129 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-11 22:26:36,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-07-11 22:26:36,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 93. [2022-07-11 22:26:36,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.141304347826087) internal successors, (105), 92 states have internal predecessors, (105), 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) [2022-07-11 22:26:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2022-07-11 22:26:36,818 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 36 [2022-07-11 22:26:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:36,818 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2022-07-11 22:26:36,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.4285714285714284) internal successors, (96), 28 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) [2022-07-11 22:26:36,818 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2022-07-11 22:26:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-11 22:26:36,819 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:36,819 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:36,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:37,036 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 [2022-07-11 22:26:37,036 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:37,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:37,037 INFO L85 PathProgramCache]: Analyzing trace with hash -754137390, now seen corresponding path program 4 times [2022-07-11 22:26:37,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:37,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496956108] [2022-07-11 22:26:37,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:37,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:37,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:37,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496956108] [2022-07-11 22:26:37,304 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496956108] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:37,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407400608] [2022-07-11 22:26:37,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:26:37,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:37,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:37,306 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) [2022-07-11 22:26:37,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-11 22:26:37,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:26:37,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:37,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 31 conjunts are in the unsatisfiable core [2022-07-11 22:26:37,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:37,454 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 [2022-07-11 22:26:37,483 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:37,483 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 [2022-07-11 22:26:37,494 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:26:37,494 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 [2022-07-11 22:26:37,685 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 6 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:37,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:37,961 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 [2022-07-11 22:26:37,965 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 [2022-07-11 22:26:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:38,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407400608] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:38,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:38,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 14] total 35 [2022-07-11 22:26:38,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617925160] [2022-07-11 22:26:38,138 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:38,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-07-11 22:26:38,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:38,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-07-11 22:26:38,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1074, Unknown=0, NotChecked=0, Total=1190 [2022-07-11 22:26:38,140 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 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) [2022-07-11 22:26:40,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:40,921 INFO L93 Difference]: Finished difference Result 285 states and 326 transitions. [2022-07-11 22:26:40,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-07-11 22:26:40,921 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 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 41 [2022-07-11 22:26:40,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:40,922 INFO L225 Difference]: With dead ends: 285 [2022-07-11 22:26:40,922 INFO L226 Difference]: Without dead ends: 275 [2022-07-11 22:26:40,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2467 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1192, Invalid=8314, Unknown=0, NotChecked=0, Total=9506 [2022-07-11 22:26:40,925 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 322 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:40,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 327 Invalid, 1488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 22:26:40,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-07-11 22:26:40,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 103. [2022-07-11 22:26:40,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1274509803921569) internal successors, (115), 102 states have internal predecessors, (115), 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) [2022-07-11 22:26:40,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2022-07-11 22:26:40,934 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 41 [2022-07-11 22:26:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:40,935 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2022-07-11 22:26:40,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.2857142857142856) internal successors, (115), 35 states have internal predecessors, (115), 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) [2022-07-11 22:26:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2022-07-11 22:26:40,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-07-11 22:26:40,936 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:40,936 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:40,953 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:41,151 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 [2022-07-11 22:26:41,152 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:41,152 INFO L85 PathProgramCache]: Analyzing trace with hash 4210706, now seen corresponding path program 1 times [2022-07-11 22:26:41,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:41,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618562939] [2022-07-11 22:26:41,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:41,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:41,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:41,294 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:41,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:41,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618562939] [2022-07-11 22:26:41,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618562939] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:41,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186727605] [2022-07-11 22:26:41,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:41,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:41,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:41,296 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) [2022-07-11 22:26:41,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-11 22:26:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:41,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 28 conjunts are in the unsatisfiable core [2022-07-11 22:26:41,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:41,361 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 [2022-07-11 22:26:41,380 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:41,380 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 [2022-07-11 22:26:41,398 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:26:41,398 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 [2022-07-11 22:26:41,522 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:41,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:41,636 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 [2022-07-11 22:26:41,638 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 [2022-07-11 22:26:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:41,655 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186727605] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:41,655 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:41,655 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2022-07-11 22:26:41,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911604507] [2022-07-11 22:26:41,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:41,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-07-11 22:26:41,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:41,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-07-11 22:26:41,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2022-07-11 22:26:41,658 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 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) [2022-07-11 22:26:42,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:42,563 INFO L93 Difference]: Finished difference Result 248 states and 280 transitions. [2022-07-11 22:26:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-07-11 22:26:42,563 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 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 41 [2022-07-11 22:26:42,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:42,564 INFO L225 Difference]: With dead ends: 248 [2022-07-11 22:26:42,564 INFO L226 Difference]: Without dead ends: 246 [2022-07-11 22:26:42,565 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 65 SyntacticMatches, 8 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1415 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=642, Invalid=3780, Unknown=0, NotChecked=0, Total=4422 [2022-07-11 22:26:42,566 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 178 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 1142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:42,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [178 Valid, 270 Invalid, 1142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-07-11 22:26:42,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-07-11 22:26:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 105. [2022-07-11 22:26:42,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.1346153846153846) internal successors, (118), 104 states have internal predecessors, (118), 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) [2022-07-11 22:26:42,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 118 transitions. [2022-07-11 22:26:42,576 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 118 transitions. Word has length 41 [2022-07-11 22:26:42,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:42,576 INFO L495 AbstractCegarLoop]: Abstraction has 105 states and 118 transitions. [2022-07-11 22:26:42,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 4.291666666666667) internal successors, (103), 24 states have internal predecessors, (103), 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) [2022-07-11 22:26:42,577 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 118 transitions. [2022-07-11 22:26:42,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 22:26:42,577 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:42,577 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:42,594 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:42,794 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 [2022-07-11 22:26:42,794 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2067550693, now seen corresponding path program 5 times [2022-07-11 22:26:42,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:42,795 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151574239] [2022-07-11 22:26:42,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:42,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:42,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:42,953 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:42,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:42,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151574239] [2022-07-11 22:26:42,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151574239] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:42,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993676947] [2022-07-11 22:26:42,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-11 22:26:42,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:42,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:42,955 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) [2022-07-11 22:26:42,980 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-11 22:26:43,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-11 22:26:43,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:43,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 32 conjunts are in the unsatisfiable core [2022-07-11 22:26:43,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:43,061 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 [2022-07-11 22:26:43,082 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:43,082 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 [2022-07-11 22:26:43,108 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:26:43,109 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 [2022-07-11 22:26:43,120 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:26:43,120 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 [2022-07-11 22:26:43,148 INFO L356 Elim1Store]: treesize reduction 64, result has 22.9 percent of original size [2022-07-11 22:26:43,148 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 29 treesize of output 31 [2022-07-11 22:26:43,391 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 22:26:43,392 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 34 treesize of output 10 [2022-07-11 22:26:43,395 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:43,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:45,360 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 47 treesize of output 43 [2022-07-11 22:26:45,368 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 22:26:45,368 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 818 treesize of output 754 [2022-07-11 22:26:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:45,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993676947] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:45,412 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:45,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 36 [2022-07-11 22:26:45,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889203818] [2022-07-11 22:26:45,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:45,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-07-11 22:26:45,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:45,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-07-11 22:26:45,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1135, Unknown=0, NotChecked=0, Total=1260 [2022-07-11 22:26:45,413 INFO L87 Difference]: Start difference. First operand 105 states and 118 transitions. Second operand has 36 states, 36 states have (on average 3.361111111111111) internal successors, (121), 36 states have internal predecessors, (121), 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) [2022-07-11 22:26:56,060 WARN L233 SmtUtils]: Spent 6.05s on a formula simplification that was a NOOP. DAG size: 47 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-11 22:26:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:56,767 INFO L93 Difference]: Finished difference Result 264 states and 291 transitions. [2022-07-11 22:26:56,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-11 22:26:56,767 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.361111111111111) internal successors, (121), 36 states have internal predecessors, (121), 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 47 [2022-07-11 22:26:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:56,768 INFO L225 Difference]: With dead ends: 264 [2022-07-11 22:26:56,768 INFO L226 Difference]: Without dead ends: 254 [2022-07-11 22:26:56,769 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 73 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1313 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=521, Invalid=4589, Unknown=2, NotChecked=0, Total=5112 [2022-07-11 22:26:56,770 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 293 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 316 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 100 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:56,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 316 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 631 Invalid, 0 Unknown, 100 Unchecked, 0.3s Time] [2022-07-11 22:26:56,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-07-11 22:26:56,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 153. [2022-07-11 22:26:56,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.144736842105263) internal successors, (174), 152 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) [2022-07-11 22:26:56,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2022-07-11 22:26:56,784 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 47 [2022-07-11 22:26:56,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:56,785 INFO L495 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2022-07-11 22:26:56,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.361111111111111) internal successors, (121), 36 states have internal predecessors, (121), 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) [2022-07-11 22:26:56,785 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2022-07-11 22:26:56,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-07-11 22:26:56,785 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:56,786 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:56,802 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:57,002 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 [2022-07-11 22:26:57,002 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:57,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:57,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1171421669, now seen corresponding path program 2 times [2022-07-11 22:26:57,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:57,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266801557] [2022-07-11 22:26:57,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:57,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:57,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:57,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:57,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266801557] [2022-07-11 22:26:57,150 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266801557] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:57,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644123102] [2022-07-11 22:26:57,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:26:57,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:57,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:57,152 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) [2022-07-11 22:26:57,177 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-11 22:26:57,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:26:57,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:26:57,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-11 22:26:57,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:57,223 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 [2022-07-11 22:26:57,237 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:57,238 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 [2022-07-11 22:26:57,389 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:26:57,389 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 [2022-07-11 22:26:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:57,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:26:57,474 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 [2022-07-11 22:26:57,476 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 [2022-07-11 22:26:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:57,492 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644123102] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:26:57,492 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:26:57,492 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 18 [2022-07-11 22:26:57,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645308559] [2022-07-11 22:26:57,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:26:57,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-07-11 22:26:57,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:57,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-07-11 22:26:57,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2022-07-11 22:26:57,493 INFO L87 Difference]: Start difference. First operand 153 states and 174 transitions. Second operand has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 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) [2022-07-11 22:26:58,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:58,773 INFO L93 Difference]: Finished difference Result 370 states and 420 transitions. [2022-07-11 22:26:58,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-07-11 22:26:58,774 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 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 47 [2022-07-11 22:26:58,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:58,775 INFO L225 Difference]: With dead ends: 370 [2022-07-11 22:26:58,775 INFO L226 Difference]: Without dead ends: 368 [2022-07-11 22:26:58,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 82 SyntacticMatches, 8 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2508 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=814, Invalid=6326, Unknown=0, NotChecked=0, Total=7140 [2022-07-11 22:26:58,777 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 202 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 1157 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 1298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 1157 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:58,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 317 Invalid, 1298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 1157 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-07-11 22:26:58,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-07-11 22:26:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 159. [2022-07-11 22:26:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.1455696202531647) internal successors, (181), 158 states have internal predecessors, (181), 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) [2022-07-11 22:26:58,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 181 transitions. [2022-07-11 22:26:58,795 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 181 transitions. Word has length 47 [2022-07-11 22:26:58,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:58,796 INFO L495 AbstractCegarLoop]: Abstraction has 159 states and 181 transitions. [2022-07-11 22:26:58,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.5) internal successors, (81), 18 states have internal predecessors, (81), 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) [2022-07-11 22:26:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 181 transitions. [2022-07-11 22:26:58,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 22:26:58,796 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:58,796 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:58,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-11 22:26:59,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:59,011 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:59,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:59,012 INFO L85 PathProgramCache]: Analyzing trace with hash -973046858, now seen corresponding path program 1 times [2022-07-11 22:26:59,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:59,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693312993] [2022-07-11 22:26:59,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:59,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:59,035 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2022-07-11 22:26:59,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:59,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693312993] [2022-07-11 22:26:59,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693312993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-11 22:26:59,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-11 22:26:59,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-11 22:26:59,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949260567] [2022-07-11 22:26:59,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-11 22:26:59,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-11 22:26:59,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:26:59,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-11 22:26:59,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-11 22:26:59,037 INFO L87 Difference]: Start difference. First operand 159 states and 181 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2022-07-11 22:26:59,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:26:59,068 INFO L93 Difference]: Finished difference Result 240 states and 271 transitions. [2022-07-11 22:26:59,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-11 22:26:59,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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 52 [2022-07-11 22:26:59,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:26:59,069 INFO L225 Difference]: With dead ends: 240 [2022-07-11 22:26:59,070 INFO L226 Difference]: Without dead ends: 170 [2022-07-11 22:26:59,070 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 [2022-07-11 22:26:59,071 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-11 22:26:59,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 50 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-11 22:26:59,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-07-11 22:26:59,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 154. [2022-07-11 22:26:59,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.1241830065359477) internal successors, (172), 153 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) [2022-07-11 22:26:59,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 172 transitions. [2022-07-11 22:26:59,086 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 172 transitions. Word has length 52 [2022-07-11 22:26:59,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:26:59,086 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 172 transitions. [2022-07-11 22:26:59,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 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) [2022-07-11 22:26:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 172 transitions. [2022-07-11 22:26:59,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 22:26:59,087 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:26:59,087 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:26:59,087 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-07-11 22:26:59,087 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:26:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:26:59,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1045433416, now seen corresponding path program 1 times [2022-07-11 22:26:59,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:26:59,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671691263] [2022-07-11 22:26:59,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:59,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:26:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:59,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:26:59,227 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671691263] [2022-07-11 22:26:59,227 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671691263] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:26:59,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747926145] [2022-07-11 22:26:59,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:26:59,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:26:59,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:26:59,229 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) [2022-07-11 22:26:59,235 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-11 22:26:59,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:26:59,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-11 22:26:59,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:26:59,325 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 [2022-07-11 22:26:59,347 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:59,348 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 [2022-07-11 22:26:59,398 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:59,399 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 [2022-07-11 22:26:59,416 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:59,416 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 [2022-07-11 22:26:59,432 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:26:59,432 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 [2022-07-11 22:26:59,583 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:26:59,583 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 24 treesize of output 10 [2022-07-11 22:26:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:26:59,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:27:20,380 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 33 treesize of output 31 [2022-07-11 22:27:20,383 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 856 treesize of output 840 [2022-07-11 22:27:20,514 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:20,514 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747926145] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:27:20,514 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:27:20,514 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 23 [2022-07-11 22:27:20,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726780387] [2022-07-11 22:27:20,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:27:20,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 22:27:20,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:27:20,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 22:27:20,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=408, Unknown=15, NotChecked=0, Total=506 [2022-07-11 22:27:20,515 INFO L87 Difference]: Start difference. First operand 154 states and 172 transitions. Second operand has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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) [2022-07-11 22:27:22,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:27:22,863 INFO L93 Difference]: Finished difference Result 268 states and 294 transitions. [2022-07-11 22:27:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-07-11 22:27:22,863 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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 52 [2022-07-11 22:27:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:27:22,864 INFO L225 Difference]: With dead ends: 268 [2022-07-11 22:27:22,864 INFO L226 Difference]: Without dead ends: 258 [2022-07-11 22:27:22,865 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 9 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 23.0s TimeCoverageRelationStatistics Valid=186, Invalid=1130, Unknown=16, NotChecked=0, Total=1332 [2022-07-11 22:27:22,865 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 84 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 39 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:27:22,865 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 228 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 371 Invalid, 0 Unknown, 39 Unchecked, 0.2s Time] [2022-07-11 22:27:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-07-11 22:27:22,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 149. [2022-07-11 22:27:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.1216216216216217) internal successors, (166), 148 states have internal predecessors, (166), 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) [2022-07-11 22:27:22,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 166 transitions. [2022-07-11 22:27:22,882 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 166 transitions. Word has length 52 [2022-07-11 22:27:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:27:22,882 INFO L495 AbstractCegarLoop]: Abstraction has 149 states and 166 transitions. [2022-07-11 22:27:22,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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) [2022-07-11 22:27:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 166 transitions. [2022-07-11 22:27:22,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-07-11 22:27:22,882 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:27:22,883 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:27:22,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-07-11 22:27:23,092 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 [2022-07-11 22:27:23,092 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:27:23,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:27:23,093 INFO L85 PathProgramCache]: Analyzing trace with hash -2066501770, now seen corresponding path program 2 times [2022-07-11 22:27:23,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:27:23,093 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810852114] [2022-07-11 22:27:23,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:27:23,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:27:23,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:27:23,267 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:23,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:27:23,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810852114] [2022-07-11 22:27:23,268 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810852114] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:27:23,268 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534924994] [2022-07-11 22:27:23,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:27:23,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:27:23,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:27:23,269 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) [2022-07-11 22:27:23,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-07-11 22:27:23,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:27:23,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:27:23,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 30 conjunts are in the unsatisfiable core [2022-07-11 22:27:23,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:27:23,373 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 [2022-07-11 22:27:23,401 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:27:23,401 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 [2022-07-11 22:27:23,443 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:27:23,443 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 [2022-07-11 22:27:23,459 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:27:23,460 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 [2022-07-11 22:27:23,478 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:27:23,478 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 [2022-07-11 22:27:23,636 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:27:23,636 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 24 treesize of output 10 [2022-07-11 22:27:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:23,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:27:51,104 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 33 treesize of output 31 [2022-07-11 22:27:51,116 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 196 treesize of output 192 [2022-07-11 22:27:51,169 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:27:51,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534924994] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:27:51,169 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:27:51,169 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 15] total 23 [2022-07-11 22:27:51,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494083855] [2022-07-11 22:27:51,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:27:51,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 22:27:51,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:27:51,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 22:27:51,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=404, Unknown=19, NotChecked=0, Total=506 [2022-07-11 22:27:51,171 INFO L87 Difference]: Start difference. First operand 149 states and 166 transitions. Second operand has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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) [2022-07-11 22:28:09,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:09,969 INFO L93 Difference]: Finished difference Result 323 states and 352 transitions. [2022-07-11 22:28:09,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-07-11 22:28:09,969 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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 52 [2022-07-11 22:28:09,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:09,970 INFO L225 Difference]: With dead ends: 323 [2022-07-11 22:28:09,970 INFO L226 Difference]: Without dead ends: 307 [2022-07-11 22:28:09,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 107 SyntacticMatches, 9 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=417, Invalid=2417, Unknown=28, NotChecked=0, Total=2862 [2022-07-11 22:28:09,972 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 181 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 539 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 539 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 116 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:09,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 237 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 539 Invalid, 0 Unknown, 116 Unchecked, 0.3s Time] [2022-07-11 22:28:09,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2022-07-11 22:28:09,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 179. [2022-07-11 22:28:09,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.1235955056179776) internal successors, (200), 178 states have internal predecessors, (200), 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) [2022-07-11 22:28:09,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 200 transitions. [2022-07-11 22:28:09,992 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 200 transitions. Word has length 52 [2022-07-11 22:28:09,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:09,992 INFO L495 AbstractCegarLoop]: Abstraction has 179 states and 200 transitions. [2022-07-11 22:28:09,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.0) internal successors, (92), 23 states have internal predecessors, (92), 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) [2022-07-11 22:28:09,992 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 200 transitions. [2022-07-11 22:28:09,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-11 22:28:09,993 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:09,993 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:10,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2022-07-11 22:28:10,195 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 [2022-07-11 22:28:10,196 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:10,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:10,196 INFO L85 PathProgramCache]: Analyzing trace with hash -210894152, now seen corresponding path program 6 times [2022-07-11 22:28:10,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:10,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018203511] [2022-07-11 22:28:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:10,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:10,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:10,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:10,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018203511] [2022-07-11 22:28:10,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018203511] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:10,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402910768] [2022-07-11 22:28:10,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-11 22:28:10,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:10,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:10,358 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) [2022-07-11 22:28:10,358 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-07-11 22:28:10,452 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-11 22:28:10,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:10,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-11 22:28:10,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:10,498 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 [2022-07-11 22:28:10,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:28:10,546 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 [2022-07-11 22:28:10,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:28:10,559 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 [2022-07-11 22:28:10,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-11 22:28:10,566 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 22 [2022-07-11 22:28:10,983 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-11 22:28:10,983 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 [2022-07-11 22:28:10,990 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:10,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:11,302 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2022-07-11 22:28:11,306 INFO L356 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2022-07-11 22:28:11,306 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 335 treesize of output 303 [2022-07-11 22:28:11,353 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 10 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:11,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402910768] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:11,354 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:11,354 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 15] total 40 [2022-07-11 22:28:11,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716026799] [2022-07-11 22:28:11,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:11,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-11 22:28:11,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:11,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-11 22:28:11,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1399, Unknown=0, NotChecked=0, Total=1560 [2022-07-11 22:28:11,356 INFO L87 Difference]: Start difference. First operand 179 states and 200 transitions. Second operand has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 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) [2022-07-11 22:28:13,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:13,191 INFO L93 Difference]: Finished difference Result 318 states and 348 transitions. [2022-07-11 22:28:13,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-07-11 22:28:13,192 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 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) Word has length 53 [2022-07-11 22:28:13,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:13,193 INFO L225 Difference]: With dead ends: 318 [2022-07-11 22:28:13,193 INFO L226 Difference]: Without dead ends: 308 [2022-07-11 22:28:13,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1532 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=901, Invalid=5419, Unknown=0, NotChecked=0, Total=6320 [2022-07-11 22:28:13,195 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 437 mSDsluCounter, 441 mSDsCounter, 0 mSdLazyCounter, 1415 mSolverCounterSat, 268 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 437 SdHoareTripleChecker+Valid, 469 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 268 IncrementalHoareTripleChecker+Valid, 1415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:13,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [437 Valid, 469 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [268 Valid, 1415 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 22:28:13,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-07-11 22:28:13,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 185. [2022-07-11 22:28:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.1195652173913044) internal successors, (206), 184 states have internal predecessors, (206), 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) [2022-07-11 22:28:13,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 206 transitions. [2022-07-11 22:28:13,216 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 206 transitions. Word has length 53 [2022-07-11 22:28:13,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:13,217 INFO L495 AbstractCegarLoop]: Abstraction has 185 states and 206 transitions. [2022-07-11 22:28:13,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.675) internal successors, (147), 40 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) [2022-07-11 22:28:13,217 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 206 transitions. [2022-07-11 22:28:13,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-07-11 22:28:13,217 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:13,217 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:13,241 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:13,431 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 [2022-07-11 22:28:13,431 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:13,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash 189318136, now seen corresponding path program 3 times [2022-07-11 22:28:13,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:13,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121576858] [2022-07-11 22:28:13,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:13,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:13,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:13,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121576858] [2022-07-11 22:28:13,547 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121576858] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:13,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265478609] [2022-07-11 22:28:13,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-11 22:28:13,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:13,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:13,548 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) [2022-07-11 22:28:13,549 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-07-11 22:28:13,627 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-07-11 22:28:13,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:13,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2022-07-11 22:28:13,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:13,653 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 [2022-07-11 22:28:13,823 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:28:13,823 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 [2022-07-11 22:28:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:13,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:13,910 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 [2022-07-11 22:28:13,911 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 26 [2022-07-11 22:28:13,927 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:13,928 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265478609] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:13,928 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:13,928 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 20 [2022-07-11 22:28:13,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792462000] [2022-07-11 22:28:13,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:13,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-07-11 22:28:13,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:13,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-07-11 22:28:13,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-07-11 22:28:13,929 INFO L87 Difference]: Start difference. First operand 185 states and 206 transitions. Second operand has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 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) [2022-07-11 22:28:15,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:15,931 INFO L93 Difference]: Finished difference Result 511 states and 573 transitions. [2022-07-11 22:28:15,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-07-11 22:28:15,932 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 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 53 [2022-07-11 22:28:15,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:15,933 INFO L225 Difference]: With dead ends: 511 [2022-07-11 22:28:15,933 INFO L226 Difference]: Without dead ends: 509 [2022-07-11 22:28:15,937 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 93 SyntacticMatches, 7 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5875 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1467, Invalid=13785, Unknown=0, NotChecked=0, Total=15252 [2022-07-11 22:28:15,937 INFO L413 NwaCegarLoop]: 59 mSDtfsCounter, 370 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 1570 mSolverCounterSat, 252 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 1822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 252 IncrementalHoareTripleChecker+Valid, 1570 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:15,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 418 Invalid, 1822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [252 Valid, 1570 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-07-11 22:28:15,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2022-07-11 22:28:15,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 217. [2022-07-11 22:28:15,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.1203703703703705) internal successors, (242), 216 states have internal predecessors, (242), 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) [2022-07-11 22:28:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 242 transitions. [2022-07-11 22:28:15,963 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 242 transitions. Word has length 53 [2022-07-11 22:28:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:15,964 INFO L495 AbstractCegarLoop]: Abstraction has 217 states and 242 transitions. [2022-07-11 22:28:15,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.55) internal successors, (91), 20 states have internal predecessors, (91), 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) [2022-07-11 22:28:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 242 transitions. [2022-07-11 22:28:15,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-07-11 22:28:15,965 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:15,965 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:15,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:16,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:16,179 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:16,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:16,180 INFO L85 PathProgramCache]: Analyzing trace with hash -1520531125, now seen corresponding path program 7 times [2022-07-11 22:28:16,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:16,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793641842] [2022-07-11 22:28:16,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:16,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:16,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:16,392 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 83 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:16,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793641842] [2022-07-11 22:28:16,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793641842] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:16,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341961901] [2022-07-11 22:28:16,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-07-11 22:28:16,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:16,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:16,393 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) [2022-07-11 22:28:16,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-07-11 22:28:16,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:16,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 14 conjunts are in the unsatisfiable core [2022-07-11 22:28:16,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:16,867 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 114 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:16,867 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 114 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:17,079 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341961901] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:17,079 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:17,079 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 40 [2022-07-11 22:28:17,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441078051] [2022-07-11 22:28:17,080 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:17,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-07-11 22:28:17,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:17,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-07-11 22:28:17,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=1178, Unknown=0, NotChecked=0, Total=1560 [2022-07-11 22:28:17,081 INFO L87 Difference]: Start difference. First operand 217 states and 242 transitions. Second operand has 40 states, 40 states have (on average 4.125) internal successors, (165), 40 states have internal predecessors, (165), 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) [2022-07-11 22:28:17,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:17,400 INFO L93 Difference]: Finished difference Result 334 states and 369 transitions. [2022-07-11 22:28:17,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-07-11 22:28:17,400 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 4.125) internal successors, (165), 40 states have internal predecessors, (165), 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 59 [2022-07-11 22:28:17,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:17,401 INFO L225 Difference]: With dead ends: 334 [2022-07-11 22:28:17,401 INFO L226 Difference]: Without dead ends: 223 [2022-07-11 22:28:17,401 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1616, Unknown=0, NotChecked=0, Total=2162 [2022-07-11 22:28:17,402 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 284 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:17,402 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 231 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-07-11 22:28:17,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-07-11 22:28:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 211. [2022-07-11 22:28:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.1142857142857143) internal successors, (234), 210 states have internal predecessors, (234), 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) [2022-07-11 22:28:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 234 transitions. [2022-07-11 22:28:17,426 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 234 transitions. Word has length 59 [2022-07-11 22:28:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:17,426 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 234 transitions. [2022-07-11 22:28:17,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 4.125) internal successors, (165), 40 states have internal predecessors, (165), 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) [2022-07-11 22:28:17,427 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 234 transitions. [2022-07-11 22:28:17,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 22:28:17,427 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:17,427 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:17,444 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:17,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:17,640 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:17,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:17,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1764330204, now seen corresponding path program 8 times [2022-07-11 22:28:17,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:17,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234366850] [2022-07-11 22:28:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:17,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:17,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:17,852 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:17,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:17,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234366850] [2022-07-11 22:28:17,852 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234366850] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:17,852 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913230532] [2022-07-11 22:28:17,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:28:17,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:17,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:17,855 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) [2022-07-11 22:28:17,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-07-11 22:28:17,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:28:17,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:17,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 39 conjunts are in the unsatisfiable core [2022-07-11 22:28:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:18,064 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 [2022-07-11 22:28:18,094 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:28:18,094 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-11 22:28:18,105 INFO L356 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2022-07-11 22:28:18,105 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 [2022-07-11 22:28:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 12 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:18,411 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:18,823 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 [2022-07-11 22:28:18,825 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 [2022-07-11 22:28:19,070 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:19,070 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913230532] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:19,070 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:19,070 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16, 18] total 47 [2022-07-11 22:28:19,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380341876] [2022-07-11 22:28:19,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:19,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-07-11 22:28:19,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:19,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-07-11 22:28:19,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=1993, Unknown=0, NotChecked=0, Total=2162 [2022-07-11 22:28:19,072 INFO L87 Difference]: Start difference. First operand 211 states and 234 transitions. Second operand has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 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) [2022-07-11 22:28:24,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:24,968 INFO L93 Difference]: Finished difference Result 579 states and 641 transitions. [2022-07-11 22:28:24,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-07-11 22:28:24,968 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 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 64 [2022-07-11 22:28:24,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:24,969 INFO L225 Difference]: With dead ends: 579 [2022-07-11 22:28:24,969 INFO L226 Difference]: Without dead ends: 569 [2022-07-11 22:28:24,971 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 97 SyntacticMatches, 3 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9139 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=2859, Invalid=25871, Unknown=0, NotChecked=0, Total=28730 [2022-07-11 22:28:24,972 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 618 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 2546 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 3104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 2546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:24,972 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 598 Invalid, 3104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 2546 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-07-11 22:28:24,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-07-11 22:28:24,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 221. [2022-07-11 22:28:25,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.1090909090909091) internal successors, (244), 220 states have internal predecessors, (244), 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) [2022-07-11 22:28:25,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 244 transitions. [2022-07-11 22:28:25,000 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 244 transitions. Word has length 64 [2022-07-11 22:28:25,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:25,000 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 244 transitions. [2022-07-11 22:28:25,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.9148936170212765) internal successors, (184), 47 states have internal predecessors, (184), 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) [2022-07-11 22:28:25,001 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 244 transitions. [2022-07-11 22:28:25,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-07-11 22:28:25,001 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:25,001 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:25,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:25,201 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,SelfDestructingSolverStorable25 [2022-07-11 22:28:25,202 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:25,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:25,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1655084638, now seen corresponding path program 2 times [2022-07-11 22:28:25,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:25,202 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408545836] [2022-07-11 22:28:25,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:25,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:25,332 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:25,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:25,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408545836] [2022-07-11 22:28:25,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408545836] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:25,332 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [632295917] [2022-07-11 22:28:25,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-11 22:28:25,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:25,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:25,333 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) [2022-07-11 22:28:25,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-07-11 22:28:25,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-11 22:28:25,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:25,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjunts are in the unsatisfiable core [2022-07-11 22:28:25,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:25,426 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 [2022-07-11 22:28:25,444 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:28:25,444 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 [2022-07-11 22:28:25,454 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:28:25,454 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 [2022-07-11 22:28:25,645 INFO L356 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2022-07-11 22:28:25,645 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 [2022-07-11 22:28:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:25,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-11 22:28:25,747 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 17 treesize of output 15 [2022-07-11 22:28:25,749 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 30 treesize of output 26 [2022-07-11 22:28:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:25,769 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [632295917] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-11 22:28:25,769 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-11 22:28:25,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 23 [2022-07-11 22:28:25,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783381500] [2022-07-11 22:28:25,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-11 22:28:25,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-07-11 22:28:25,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-11 22:28:25,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-07-11 22:28:25,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2022-07-11 22:28:25,771 INFO L87 Difference]: Start difference. First operand 221 states and 244 transitions. Second operand has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 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) [2022-07-11 22:28:28,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-11 22:28:28,172 INFO L93 Difference]: Finished difference Result 599 states and 674 transitions. [2022-07-11 22:28:28,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-07-11 22:28:28,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 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 64 [2022-07-11 22:28:28,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-11 22:28:28,174 INFO L225 Difference]: With dead ends: 599 [2022-07-11 22:28:28,174 INFO L226 Difference]: Without dead ends: 597 [2022-07-11 22:28:28,175 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 114 SyntacticMatches, 9 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7634 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1616, Invalid=18124, Unknown=0, NotChecked=0, Total=19740 [2022-07-11 22:28:28,176 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 484 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 1815 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 484 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 2077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 1815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-07-11 22:28:28,176 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [484 Valid, 395 Invalid, 2077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 1815 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-07-11 22:28:28,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 597 states. [2022-07-11 22:28:28,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 597 to 223. [2022-07-11 22:28:28,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.1126126126126126) internal successors, (247), 222 states have internal predecessors, (247), 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) [2022-07-11 22:28:28,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 247 transitions. [2022-07-11 22:28:28,207 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 247 transitions. Word has length 64 [2022-07-11 22:28:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-11 22:28:28,207 INFO L495 AbstractCegarLoop]: Abstraction has 223 states and 247 transitions. [2022-07-11 22:28:28,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.826086956521739) internal successors, (111), 23 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) [2022-07-11 22:28:28,207 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 247 transitions. [2022-07-11 22:28:28,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-07-11 22:28:28,208 INFO L187 NwaCegarLoop]: Found error trace [2022-07-11 22:28:28,208 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-11 22:28:28,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-07-11 22:28:28,423 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,SelfDestructingSolverStorable26 [2022-07-11 22:28:28,423 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-11 22:28:28,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-11 22:28:28,424 INFO L85 PathProgramCache]: Analyzing trace with hash 97398435, now seen corresponding path program 4 times [2022-07-11 22:28:28,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-11 22:28:28,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374141475] [2022-07-11 22:28:28,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-11 22:28:28,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-11 22:28:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-11 22:28:28,666 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 23 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:28,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-11 22:28:28,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374141475] [2022-07-11 22:28:28,667 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374141475] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-11 22:28:28,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382926961] [2022-07-11 22:28:28,667 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-11 22:28:28,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-11 22:28:28,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-11 22:28:28,668 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) [2022-07-11 22:28:28,703 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-07-11 22:28:28,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-11 22:28:28,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-11 22:28:28,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 51 conjunts are in the unsatisfiable core [2022-07-11 22:28:28,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-11 22:28:28,786 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 [2022-07-11 22:28:28,812 INFO L356 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2022-07-11 22:28:28,813 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 [2022-07-11 22:28:28,851 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:28,852 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 [2022-07-11 22:28:28,862 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:28,863 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:28:28,874 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:28,874 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 [2022-07-11 22:28:28,900 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:28,901 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 [2022-07-11 22:28:28,910 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:28,911 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 [2022-07-11 22:28:28,923 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:28,923 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 [2022-07-11 22:28:28,952 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:28,952 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 [2022-07-11 22:28:28,966 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:28,966 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 [2022-07-11 22:28:28,978 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:28,978 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:28:29,008 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:29,009 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 [2022-07-11 22:28:29,021 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:29,021 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2022-07-11 22:28:29,047 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-07-11 22:28:29,047 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 25 [2022-07-11 22:28:29,186 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 [2022-07-11 22:28:29,189 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 32 proven. 101 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-11 22:28:29,189 INFO L328 TraceCheckSpWp]: Computing backward predicates...