./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-fpi/sina1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 35987657 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-fpi/sina1.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 b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf --- Real Ultimate output --- This is Ultimate 0.2.2-?-3598765 [2022-07-20 22:18:08,648 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-20 22:18:08,656 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-20 22:18:08,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-20 22:18:08,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-20 22:18:08,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-20 22:18:08,703 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-20 22:18:08,705 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-20 22:18:08,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-20 22:18:08,711 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-20 22:18:08,712 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-20 22:18:08,713 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-20 22:18:08,714 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-20 22:18:08,715 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-20 22:18:08,716 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-20 22:18:08,719 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-20 22:18:08,720 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-20 22:18:08,721 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-20 22:18:08,722 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-20 22:18:08,727 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-20 22:18:08,729 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-20 22:18:08,730 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-20 22:18:08,730 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-20 22:18:08,731 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-20 22:18:08,733 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-20 22:18:08,739 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-20 22:18:08,739 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-20 22:18:08,739 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-20 22:18:08,740 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-20 22:18:08,741 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-20 22:18:08,741 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-20 22:18:08,742 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-20 22:18:08,743 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-20 22:18:08,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-20 22:18:08,744 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-20 22:18:08,745 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-20 22:18:08,745 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-20 22:18:08,746 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-20 22:18:08,746 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-20 22:18:08,746 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-20 22:18:08,747 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-20 22:18:08,748 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-20 22:18:08,749 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-20 22:18:08,778 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-20 22:18:08,778 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-20 22:18:08,778 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-20 22:18:08,779 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-20 22:18:08,779 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-20 22:18:08,779 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-20 22:18:08,780 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-20 22:18:08,780 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-20 22:18:08,780 INFO L138 SettingsManager]: * Use SBE=true [2022-07-20 22:18:08,781 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-20 22:18:08,781 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-20 22:18:08,781 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-20 22:18:08,781 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-20 22:18:08,782 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-20 22:18:08,782 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-20 22:18:08,782 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-20 22:18:08,782 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-20 22:18:08,782 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-20 22:18:08,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-20 22:18:08,784 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-20 22:18:08,784 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-20 22:18:08,784 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-20 22:18:08,784 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-20 22:18:08,784 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-20 22:18:08,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:18:08,785 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-20 22:18:08,785 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-20 22:18:08,785 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-20 22:18:08,785 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-20 22:18:08,785 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-20 22:18:08,786 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-20 22:18:08,786 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-20 22:18:08,786 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-20 22:18:08,786 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b1c30dcb0753c92b26d7933797d6cb35ad9e557c83930a4dbbba40b5521c6adf [2022-07-20 22:18:09,030 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-20 22:18:09,052 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-20 22:18:09,054 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-20 22:18:09,055 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-20 22:18:09,056 INFO L275 PluginConnector]: CDTParser initialized [2022-07-20 22:18:09,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-fpi/sina1.c [2022-07-20 22:18:09,115 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb99ccec/30d76b4e06d748fba75b129a649dfaee/FLAGbb007dfff [2022-07-20 22:18:09,443 INFO L306 CDTParser]: Found 1 translation units. [2022-07-20 22:18:09,444 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-fpi/sina1.c [2022-07-20 22:18:09,448 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb99ccec/30d76b4e06d748fba75b129a649dfaee/FLAGbb007dfff [2022-07-20 22:18:09,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cdb99ccec/30d76b4e06d748fba75b129a649dfaee [2022-07-20 22:18:09,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-20 22:18:09,872 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-20 22:18:09,873 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-20 22:18:09,873 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-20 22:18:09,876 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-20 22:18:09,876 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:18:09" (1/1) ... [2022-07-20 22:18:09,877 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@53d9e5e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:09, skipping insertion in model container [2022-07-20 22:18:09,878 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.07 10:18:09" (1/1) ... [2022-07-20 22:18:09,884 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-20 22:18:09,896 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-20 22:18:10,030 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-fpi/sina1.c[588,601] [2022-07-20 22:18:10,044 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:18:10,049 INFO L203 MainTranslator]: Completed pre-run [2022-07-20 22:18:10,056 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-fpi/sina1.c[588,601] [2022-07-20 22:18:10,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-20 22:18:10,073 INFO L208 MainTranslator]: Completed translation [2022-07-20 22:18:10,074 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10 WrapperNode [2022-07-20 22:18:10,074 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-20 22:18:10,075 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-20 22:18:10,075 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-20 22:18:10,075 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-20 22:18:10,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (1/1) ... [2022-07-20 22:18:10,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (1/1) ... [2022-07-20 22:18:10,108 INFO L137 Inliner]: procedures = 17, calls = 19, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 71 [2022-07-20 22:18:10,109 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-20 22:18:10,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-20 22:18:10,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-20 22:18:10,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-20 22:18:10,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (1/1) ... [2022-07-20 22:18:10,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (1/1) ... [2022-07-20 22:18:10,118 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (1/1) ... [2022-07-20 22:18:10,118 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (1/1) ... [2022-07-20 22:18:10,126 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (1/1) ... [2022-07-20 22:18:10,128 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (1/1) ... [2022-07-20 22:18:10,129 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (1/1) ... [2022-07-20 22:18:10,133 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-20 22:18:10,134 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-20 22:18:10,134 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-20 22:18:10,134 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-20 22:18:10,135 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (1/1) ... [2022-07-20 22:18:10,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-20 22:18:10,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:18:10,161 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) [2022-07-20 22:18:10,167 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 [2022-07-20 22:18:10,193 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-20 22:18:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-20 22:18:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-20 22:18:10,194 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-20 22:18:10,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-20 22:18:10,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-20 22:18:10,198 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-20 22:18:10,198 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-20 22:18:10,198 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-20 22:18:10,259 INFO L234 CfgBuilder]: Building ICFG [2022-07-20 22:18:10,261 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-20 22:18:10,460 INFO L275 CfgBuilder]: Performing block encoding [2022-07-20 22:18:10,464 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-20 22:18:10,465 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-20 22:18:10,466 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:18:10 BoogieIcfgContainer [2022-07-20 22:18:10,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-20 22:18:10,468 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-20 22:18:10,468 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-20 22:18:10,471 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-20 22:18:10,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.07 10:18:09" (1/3) ... [2022-07-20 22:18:10,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa8d53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:18:10, skipping insertion in model container [2022-07-20 22:18:10,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.07 10:18:10" (2/3) ... [2022-07-20 22:18:10,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fa8d53d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.07 10:18:10, skipping insertion in model container [2022-07-20 22:18:10,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.07 10:18:10" (3/3) ... [2022-07-20 22:18:10,473 INFO L111 eAbstractionObserver]: Analyzing ICFG sina1.c [2022-07-20 22:18:10,502 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-20 22:18:10,503 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-20 22:18:10,573 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-20 22:18:10,580 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@50da404e, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@4dea6d5a [2022-07-20 22:18:10,580 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-20 22:18:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 22:18:10,599 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:18:10,600 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:18:10,601 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:18:10,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:18:10,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2022-07-20 22:18:10,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:18:10,615 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143394655] [2022-07-20 22:18:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:18:10,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:18:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:18:10,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:18:10,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:18:10,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143394655] [2022-07-20 22:18:10,764 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143394655] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:18:10,764 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:18:10,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-20 22:18:10,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249224647] [2022-07-20 22:18:10,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:18:10,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-20 22:18:10,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:18:10,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-20 22:18:10,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-20 22:18:10,799 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:10,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:18:10,815 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2022-07-20 22:18:10,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-20 22:18:10,819 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-07-20 22:18:10,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:18:10,824 INFO L225 Difference]: With dead ends: 38 [2022-07-20 22:18:10,825 INFO L226 Difference]: Without dead ends: 17 [2022-07-20 22:18:10,827 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 [2022-07-20 22:18:10,836 INFO L413 NwaCegarLoop]: 24 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, 24 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 [2022-07-20 22:18:10,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:18:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-07-20 22:18:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-07-20 22:18:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:10,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-20 22:18:10,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2022-07-20 22:18:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:18:10,865 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-20 22:18:10,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-20 22:18:10,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-07-20 22:18:10,867 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:18:10,867 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:18:10,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-20 22:18:10,868 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:18:10,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:18:10,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2022-07-20 22:18:10,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:18:10,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003459012] [2022-07-20 22:18:10,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:18:10,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:18:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:18:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:18:11,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:18:11,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003459012] [2022-07-20 22:18:11,003 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003459012] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-20 22:18:11,003 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-20 22:18:11,004 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-20 22:18:11,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9658494] [2022-07-20 22:18:11,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-20 22:18:11,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-20 22:18:11,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:18:11,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-20 22:18:11,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:18:11,007 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:11,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:18:11,057 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2022-07-20 22:18:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-20 22:18:11,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 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 12 [2022-07-20 22:18:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:18:11,060 INFO L225 Difference]: With dead ends: 37 [2022-07-20 22:18:11,060 INFO L226 Difference]: Without dead ends: 27 [2022-07-20 22:18:11,061 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-20 22:18:11,063 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-20 22:18:11,064 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-20 22:18:11,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-07-20 22:18:11,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2022-07-20 22:18:11,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:11,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-07-20 22:18:11,072 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 12 [2022-07-20 22:18:11,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:18:11,074 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-07-20 22:18:11,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:11,074 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-07-20 22:18:11,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-07-20 22:18:11,075 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:18:11,075 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:18:11,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-20 22:18:11,075 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:18:11,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:18:11,076 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2022-07-20 22:18:11,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:18:11,076 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491595926] [2022-07-20 22:18:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:18:11,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:18:11,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:18:11,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:18:11,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:18:11,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491595926] [2022-07-20 22:18:11,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491595926] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:18:11,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8283946] [2022-07-20 22:18:11,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:18:11,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:18:11,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:18:11,480 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) [2022-07-20 22:18:11,481 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-20 22:18:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:18:11,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 27 conjunts are in the unsatisfiable core [2022-07-20 22:18:11,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:18:11,588 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 11 treesize of output 7 [2022-07-20 22:18:11,620 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:18:11,706 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 22:18:11,707 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 18 [2022-07-20 22:18:11,781 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 32 treesize of output 20 [2022-07-20 22:18:11,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:18:11,809 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:18:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:18:18,226 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8283946] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:18:18,226 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:18:18,226 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2022-07-20 22:18:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833474826] [2022-07-20 22:18:18,227 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:18:18,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-07-20 22:18:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:18:18,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-07-20 22:18:18,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=336, Unknown=3, NotChecked=0, Total=420 [2022-07-20 22:18:18,231 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:18,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:18:18,660 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2022-07-20 22:18:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 22:18:18,661 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 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 16 [2022-07-20 22:18:18,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:18:18,661 INFO L225 Difference]: With dead ends: 41 [2022-07-20 22:18:18,661 INFO L226 Difference]: Without dead ends: 39 [2022-07-20 22:18:18,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=259, Invalid=794, Unknown=3, NotChecked=0, Total=1056 [2022-07-20 22:18:18,663 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 59 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:18:18,663 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 99 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 190 Invalid, 0 Unknown, 25 Unchecked, 0.2s Time] [2022-07-20 22:18:18,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-07-20 22:18:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 28. [2022-07-20 22:18:18,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2022-07-20 22:18:18,669 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2022-07-20 22:18:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:18:18,669 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2022-07-20 22:18:18,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 21 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2022-07-20 22:18:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-07-20 22:18:18,670 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:18:18,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:18:18,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-07-20 22:18:18,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:18:18,871 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:18:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:18:18,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1174519208, now seen corresponding path program 2 times [2022-07-20 22:18:18,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:18:18,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395816655] [2022-07-20 22:18:18,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:18:18,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:18:18,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:18:18,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:18:18,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:18:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395816655] [2022-07-20 22:18:18,977 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395816655] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:18:18,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277352870] [2022-07-20 22:18:18,977 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:18:18,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:18:18,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:18:18,979 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) [2022-07-20 22:18:18,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-20 22:18:19,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:18:19,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:18:19,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:18:19,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:18:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:18:19,108 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:18:19,138 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:18:19,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277352870] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:18:19,138 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:18:19,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-20 22:18:19,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739076812] [2022-07-20 22:18:19,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:18:19,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 22:18:19,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:18:19,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 22:18:19,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:18:19,140 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-07-20 22:18:19,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:18:19,267 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-07-20 22:18:19,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:18:19,267 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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 18 [2022-07-20 22:18:19,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:18:19,269 INFO L225 Difference]: With dead ends: 58 [2022-07-20 22:18:19,269 INFO L226 Difference]: Without dead ends: 51 [2022-07-20 22:18:19,271 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2022-07-20 22:18:19,274 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:18:19,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 81 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:18:19,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-07-20 22:18:19,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 30. [2022-07-20 22:18:19,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:19,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-07-20 22:18:19,295 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 18 [2022-07-20 22:18:19,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:18:19,295 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-07-20 22:18:19,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 11 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) [2022-07-20 22:18:19,295 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-07-20 22:18:19,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 22:18:19,296 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:18:19,296 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:18:19,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-20 22:18:19,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2022-07-20 22:18:19,499 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:18:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:18:19,500 INFO L85 PathProgramCache]: Analyzing trace with hash 798963152, now seen corresponding path program 1 times [2022-07-20 22:18:19,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:18:19,500 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165518639] [2022-07-20 22:18:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:18:19,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:18:19,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:18:19,554 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:18:19,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:18:19,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165518639] [2022-07-20 22:18:19,559 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165518639] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:18:19,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816829567] [2022-07-20 22:18:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:18:19,559 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:18:19,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:18:19,560 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) [2022-07-20 22:18:19,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-20 22:18:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:18:19,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-20 22:18:19,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:18:19,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:18:19,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:18:19,691 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-20 22:18:19,692 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816829567] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:18:19,692 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:18:19,692 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2022-07-20 22:18:19,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690728326] [2022-07-20 22:18:19,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:18:19,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-07-20 22:18:19,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:18:19,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-07-20 22:18:19,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2022-07-20 22:18:19,693 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:18:19,770 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2022-07-20 22:18:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-07-20 22:18:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2022-07-20 22:18:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:18:19,773 INFO L225 Difference]: With dead ends: 58 [2022-07-20 22:18:19,773 INFO L226 Difference]: Without dead ends: 37 [2022-07-20 22:18:19,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2022-07-20 22:18:19,774 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:18:19,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 52 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:18:19,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-07-20 22:18:19,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 23. [2022-07-20 22:18:19,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 22 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) [2022-07-20 22:18:19,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2022-07-20 22:18:19,778 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 20 [2022-07-20 22:18:19,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:18:19,779 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2022-07-20 22:18:19,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:18:19,779 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2022-07-20 22:18:19,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-07-20 22:18:19,780 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:18:19,780 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:18:19,806 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-20 22:18:20,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:18:20,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:18:20,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:18:20,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2022-07-20 22:18:20,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:18:20,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536550810] [2022-07-20 22:18:20,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:18:20,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:18:20,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:18:20,329 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:18:20,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:18:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536550810] [2022-07-20 22:18:20,329 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536550810] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:18:20,329 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824798014] [2022-07-20 22:18:20,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:18:20,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:18:20,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:18:20,331 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) [2022-07-20 22:18:20,355 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-20 22:18:20,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 22:18:20,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:18:20,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 38 conjunts are in the unsatisfiable core [2022-07-20 22:18:20,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:18:20,403 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 11 treesize of output 7 [2022-07-20 22:18:20,425 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:18:20,468 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:18:20,600 INFO L356 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2022-07-20 22:18:20,601 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 18 [2022-07-20 22:18:20,660 INFO L356 Elim1Store]: treesize reduction 19, result has 40.6 percent of original size [2022-07-20 22:18:20,660 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 28 [2022-07-20 22:18:20,787 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-07-20 22:18:20,820 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:18:20,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:19:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:19:00,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824798014] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:19:00,560 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:19:00,560 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 15] total 37 [2022-07-20 22:19:00,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193511872] [2022-07-20 22:19:00,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:19:00,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-07-20 22:19:00,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:19:00,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-07-20 22:19:00,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=1153, Unknown=13, NotChecked=0, Total=1332 [2022-07-20 22:19:00,562 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 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) [2022-07-20 22:19:07,641 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_130 Int)) (= c_~N~0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_130) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0))) (<= c_~N~0 .cse0) (= |c_ULTIMATE.start_main_~i~0#1| 0) (<= .cse0 c_~N~0) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0))) is different from false [2022-07-20 22:19:09,645 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) 0))) (and (forall ((|ULTIMATE.start_main_~i~0#1| Int)) (or (forall ((v_ArrVal_130 Int)) (= c_~N~0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_130) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< (+ |ULTIMATE.start_main_~i~0#1| 1) c_~N~0))) (not (= (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) 0)) (<= .cse0 c_~N~0) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= c_~N~0 .cse0))) is different from false [2022-07-20 22:19:14,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:19:14,253 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2022-07-20 22:19:14,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-07-20 22:19:14,253 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 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) Word has length 20 [2022-07-20 22:19:14,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:19:14,254 INFO L225 Difference]: With dead ends: 77 [2022-07-20 22:19:14,254 INFO L226 Difference]: Without dead ends: 75 [2022-07-20 22:19:14,256 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 53.5s TimeCoverageRelationStatistics Valid=483, Invalid=3168, Unknown=17, NotChecked=238, Total=3906 [2022-07-20 22:19:14,256 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 115 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 155 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-07-20 22:19:14,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 237 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 228 Invalid, 0 Unknown, 155 Unchecked, 0.2s Time] [2022-07-20 22:19:14,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-07-20 22:19:14,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 36. [2022-07-20 22:19:14,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 35 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) [2022-07-20 22:19:14,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2022-07-20 22:19:14,263 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 20 [2022-07-20 22:19:14,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:19:14,263 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2022-07-20 22:19:14,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.3243243243243243) internal successors, (49), 37 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) [2022-07-20 22:19:14,263 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2022-07-20 22:19:14,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 22:19:14,264 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:19:14,264 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:19:14,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-07-20 22:19:14,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:19:14,479 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:19:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:19:14,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 2 times [2022-07-20 22:19:14,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:19:14,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094527117] [2022-07-20 22:19:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:19:14,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:19:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:19:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:19:14,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:19:14,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094527117] [2022-07-20 22:19:14,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094527117] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:19:14,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803373773] [2022-07-20 22:19:14,971 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-20 22:19:14,971 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:19:14,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:19:14,980 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) [2022-07-20 22:19:14,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-07-20 22:19:15,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-20 22:19:15,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:19:15,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 36 conjunts are in the unsatisfiable core [2022-07-20 22:19:15,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:19:15,045 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2022-07-20 22:19:15,076 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-07-20 22:19:15,115 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 19 [2022-07-20 22:19:15,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:19:15,174 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2022-07-20 22:19:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:19:15,425 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:19:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:19:15,637 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803373773] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:19:15,637 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:19:15,637 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 11] total 34 [2022-07-20 22:19:15,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526510027] [2022-07-20 22:19:15,637 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:19:15,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-07-20 22:19:15,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:19:15,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-07-20 22:19:15,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-07-20 22:19:15,638 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:19:18,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:19:18,800 INFO L93 Difference]: Finished difference Result 98 states and 110 transitions. [2022-07-20 22:19:18,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-07-20 22:19:18,801 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 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 [2022-07-20 22:19:18,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:19:18,801 INFO L225 Difference]: With dead ends: 98 [2022-07-20 22:19:18,801 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 22:19:18,803 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 9 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1424 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=645, Invalid=3777, Unknown=0, NotChecked=0, Total=4422 [2022-07-20 22:19:18,803 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 148 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 612 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 113 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-07-20 22:19:18,803 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 167 Invalid, 612 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 392 Invalid, 0 Unknown, 113 Unchecked, 0.3s Time] [2022-07-20 22:19:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 22:19:18,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 47. [2022-07-20 22:19:18,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.1956521739130435) internal successors, (55), 46 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:19:18,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-07-20 22:19:18,813 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 24 [2022-07-20 22:19:18,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:19:18,813 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-07-20 22:19:18,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6764705882352942) internal successors, (57), 34 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:19:18,813 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-07-20 22:19:18,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-07-20 22:19:18,814 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:19:18,814 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:19:18,839 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-07-20 22:19:19,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:19:19,037 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:19:19,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:19:19,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2022-07-20 22:19:19,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:19:19,038 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901830040] [2022-07-20 22:19:19,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:19:19,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:19:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:19:19,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:19:19,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:19:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901830040] [2022-07-20 22:19:19,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901830040] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:19:19,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110689531] [2022-07-20 22:19:19,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:19:19,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:19:19,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:19:19,632 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) [2022-07-20 22:19:19,634 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-07-20 22:19:19,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:19:19,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:19:19,690 WARN L261 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 46 conjunts are in the unsatisfiable core [2022-07-20 22:19:19,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:19:19,701 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 11 treesize of output 7 [2022-07-20 22:19:19,726 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:19:19,778 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:19:19,836 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-20 22:19:19,924 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-20 22:19:19,924 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 34 treesize of output 25 [2022-07-20 22:19:19,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:19:19,997 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 30 treesize of output 25 [2022-07-20 22:19:20,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:19:20,042 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 30 treesize of output 25 [2022-07-20 22:19:20,099 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 23 [2022-07-20 22:19:20,129 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:19:20,129 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:19:22,238 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_65| Int)) (or (forall ((v_ArrVal_219 Int)) (= c_~N~0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_65| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_219) |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_65|)))) is different from false [2022-07-20 22:19:24,291 WARN L833 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_66| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_66|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_65| Int) (v_ArrVal_219 Int) (v_ArrVal_216 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_66| 1) |v_ULTIMATE.start_main_~i~0#1_65|)) (= c_~N~0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_216) (+ (* |v_ULTIMATE.start_main_~i~0#1_65| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_219) |c_ULTIMATE.start_main_~a~0#1.offset|)))))) is different from false [2022-07-20 22:19:48,509 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:19:48,510 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2022-07-20 22:19:48,514 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:19:48,514 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 1 [2022-07-20 22:19:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 3 not checked. [2022-07-20 22:19:48,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110689531] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:19:48,515 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:19:48,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 15] total 39 [2022-07-20 22:19:48,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007697146] [2022-07-20 22:19:48,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:19:48,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-07-20 22:19:48,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:19:48,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-07-20 22:19:48,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=1176, Unknown=14, NotChecked=142, Total=1482 [2022-07-20 22:19:48,516 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 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) [2022-07-20 22:20:01,626 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_66| Int) (|v_ULTIMATE.start_main_~i~0#1_65| Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_66|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_66| 1) |v_ULTIMATE.start_main_~i~0#1_65|)) (and (forall ((|ULTIMATE.start_main_~a~0#1.base| Int) (v_ArrVal_219 Int) (v_ArrVal_216 Int)) (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) (select (store (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse1 (+ (select .cse0 |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse0 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse1)) |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_216) (+ (* |v_ULTIMATE.start_main_~i~0#1_65| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_219) |c_ULTIMATE.start_main_~a~0#1.offset|))) (forall ((|ULTIMATE.start_main_~a~0#1.base| Int) (v_ArrVal_219 Int) (v_ArrVal_216 Int)) (<= (select (store (store (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (+ (select .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset|) 1))) (store (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse2 |c_ULTIMATE.start_main_~#sum~0#1.offset| .cse3)) |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| .cse3))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_216) (+ (* |v_ULTIMATE.start_main_~i~0#1_65| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_219) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ 2 |c_ULTIMATE.start_main_~i~0#1|)))))) (or (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0) (forall ((|ULTIMATE.start_main_~a~0#1.base| Int) (|v_ULTIMATE.start_main_~i~0#1_66| Int) (|v_ULTIMATE.start_main_~i~0#1_65| Int) (v_ArrVal_219 Int) (v_ArrVal_216 Int)) (or (not (<= 1 |v_ULTIMATE.start_main_~i~0#1_66|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_66| 1) |v_ULTIMATE.start_main_~i~0#1_65|)) (= c_~N~0 (select (store (store (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_216) (+ (* |v_ULTIMATE.start_main_~i~0#1_65| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_219) |c_ULTIMATE.start_main_~a~0#1.offset|)))))) is different from false [2022-07-20 22:20:06,748 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_65| Int)) (or (forall ((v_ArrVal_219 Int)) (= c_~N~0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_65| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_219) |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_65|)))) (= c_~N~0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) is different from false [2022-07-20 22:20:08,751 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|)))) (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (<= .cse0 c_~N~0) (forall ((|v_ULTIMATE.start_main_~i~0#1_66| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_66|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_65| Int) (v_ArrVal_219 Int) (v_ArrVal_216 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_66| 1) |v_ULTIMATE.start_main_~i~0#1_65|)) (= c_~N~0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_66| 4)) v_ArrVal_216) (+ (* |v_ULTIMATE.start_main_~i~0#1_65| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_219) |c_ULTIMATE.start_main_~a~0#1.offset|)))))) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (+ c_~N~0 (- 3)) 0) (<= 3 .cse0))) is different from false [2022-07-20 22:20:10,761 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) |c_ULTIMATE.start_main_~a~0#1.offset|))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_65| Int)) (or (forall ((v_ArrVal_219 Int)) (= c_~N~0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |v_ULTIMATE.start_main_~i~0#1_65| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_219) |c_ULTIMATE.start_main_~a~0#1.offset|))) (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_65|)))) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (<= .cse0 c_~N~0) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (= (+ c_~N~0 (- 3)) 0) (<= 3 .cse0))) is different from false [2022-07-20 22:20:10,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:20:10,935 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2022-07-20 22:20:10,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-07-20 22:20:10,935 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 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) Word has length 24 [2022-07-20 22:20:10,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:20:10,937 INFO L225 Difference]: With dead ends: 106 [2022-07-20 22:20:10,937 INFO L226 Difference]: Without dead ends: 104 [2022-07-20 22:20:10,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 7 SemanticMatches, 55 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 50.8s TimeCoverageRelationStatistics Valid=265, Invalid=2282, Unknown=27, NotChecked=618, Total=3192 [2022-07-20 22:20:10,939 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:20:10,939 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 169 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 188 Invalid, 0 Unknown, 171 Unchecked, 0.1s Time] [2022-07-20 22:20:10,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-07-20 22:20:10,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 62. [2022-07-20 22:20:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 61 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) [2022-07-20 22:20:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2022-07-20 22:20:10,967 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 24 [2022-07-20 22:20:10,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:20:10,968 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2022-07-20 22:20:10,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.435897435897436) internal successors, (56), 39 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) [2022-07-20 22:20:10,969 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2022-07-20 22:20:10,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 22:20:10,974 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:20:10,974 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:20:11,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-07-20 22:20:11,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:20:11,196 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:20:11,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:20:11,196 INFO L85 PathProgramCache]: Analyzing trace with hash -55017726, now seen corresponding path program 3 times [2022-07-20 22:20:11,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:20:11,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314492271] [2022-07-20 22:20:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:20:11,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:20:11,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:20:11,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:20:11,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:20:11,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314492271] [2022-07-20 22:20:11,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314492271] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:20:11,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042933189] [2022-07-20 22:20:11,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-20 22:20:11,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:20:11,268 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:20:11,269 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) [2022-07-20 22:20:11,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-07-20 22:20:11,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-07-20 22:20:11,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:20:11,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 8 conjunts are in the unsatisfiable core [2022-07-20 22:20:11,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:20:11,381 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:20:11,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:20:11,413 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:20:11,414 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042933189] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:20:11,414 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:20:11,414 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2022-07-20 22:20:11,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625192217] [2022-07-20 22:20:11,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:20:11,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-07-20 22:20:11,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:20:11,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-07-20 22:20:11,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-07-20 22:20:11,416 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:20:11,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:20:11,509 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2022-07-20 22:20:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-07-20 22:20:11,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 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 28 [2022-07-20 22:20:11,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:20:11,510 INFO L225 Difference]: With dead ends: 108 [2022-07-20 22:20:11,510 INFO L226 Difference]: Without dead ends: 76 [2022-07-20 22:20:11,510 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2022-07-20 22:20:11,511 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 53 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:20:11,511 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 69 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:20:11,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-07-20 22:20:11,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 56. [2022-07-20 22:20:11,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:20:11,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2022-07-20 22:20:11,520 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 28 [2022-07-20 22:20:11,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:20:11,520 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2022-07-20 22:20:11,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.142857142857143) internal successors, (44), 14 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:20:11,520 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2022-07-20 22:20:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-07-20 22:20:11,521 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:20:11,521 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:20:11,538 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-07-20 22:20:11,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:20:11,723 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:20:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:20:11,724 INFO L85 PathProgramCache]: Analyzing trace with hash 778799246, now seen corresponding path program 5 times [2022-07-20 22:20:11,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:20:11,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121241066] [2022-07-20 22:20:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:20:11,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:20:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:20:12,186 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:20:12,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:20:12,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121241066] [2022-07-20 22:20:12,186 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121241066] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:20:12,186 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994075305] [2022-07-20 22:20:12,186 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 22:20:12,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:20:12,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:20:12,187 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) [2022-07-20 22:20:12,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-07-20 22:20:12,248 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2022-07-20 22:20:12,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:20:12,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 52 conjunts are in the unsatisfiable core [2022-07-20 22:20:12,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:20:12,257 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 11 treesize of output 7 [2022-07-20 22:20:12,285 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:20:12,313 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-20 22:20:12,347 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-20 22:20:12,384 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:20:12,444 INFO L173 IndexEqualityManager]: detected equality via solver [2022-07-20 22:20:12,451 INFO L356 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2022-07-20 22:20:12,451 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-07-20 22:20:12,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:12,521 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 28 treesize of output 27 [2022-07-20 22:20:12,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:12,558 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2022-07-20 22:20:12,592 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:12,593 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 [2022-07-20 22:20:12,721 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 32 treesize of output 20 [2022-07-20 22:20:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:20:12,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:20:15,403 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_312 Int) (v_ArrVal_311 Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (v_ArrVal_309 Int)) (<= (select (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (store (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ .cse0 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_309) (+ .cse0 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_311) (+ .cse0 12 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_312)) |c_ULTIMATE.start_main_~a~0#1.offset|) (+ |c_ULTIMATE.start_main_~i~0#1| 4))) (forall ((v_ArrVal_312 Int) (v_ArrVal_311 Int) (|ULTIMATE.start_main_~a~0#1.base| Int) (v_ArrVal_309 Int)) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 4) (select (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (store (store (store (store (select |c_#memory_int| |ULTIMATE.start_main_~a~0#1.base|) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|) (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (+ .cse1 |c_ULTIMATE.start_main_~a~0#1.offset| 4) v_ArrVal_309) (+ .cse1 8 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_311) (+ .cse1 12 |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_312)) |c_ULTIMATE.start_main_~a~0#1.offset|)))) is different from false [2022-07-20 22:20:15,578 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2022-07-20 22:20:15,578 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994075305] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:20:15,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:20:15,579 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17, 19] total 54 [2022-07-20 22:20:15,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653605373] [2022-07-20 22:20:15,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:20:15,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-07-20 22:20:15,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:20:15,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-07-20 22:20:15,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=2532, Unknown=1, NotChecked=102, Total=2862 [2022-07-20 22:20:15,580 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:20:19,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:20:19,151 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2022-07-20 22:20:19,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-07-20 22:20:19,151 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 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 28 [2022-07-20 22:20:19,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:20:19,152 INFO L225 Difference]: With dead ends: 144 [2022-07-20 22:20:19,152 INFO L226 Difference]: Without dead ends: 131 [2022-07-20 22:20:19,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=653, Invalid=6832, Unknown=1, NotChecked=170, Total=7656 [2022-07-20 22:20:19,154 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 145 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 755 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 1139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 251 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-07-20 22:20:19,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 354 Invalid, 1139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 755 Invalid, 0 Unknown, 251 Unchecked, 0.4s Time] [2022-07-20 22:20:19,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-07-20 22:20:19,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 71. [2022-07-20 22:20:19,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2) internal successors, (84), 70 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:20:19,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2022-07-20 22:20:19,164 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 28 [2022-07-20 22:20:19,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:20:19,164 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2022-07-20 22:20:19,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.3518518518518519) internal successors, (73), 54 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:20:19,164 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2022-07-20 22:20:19,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 22:20:19,165 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:20:19,165 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:20:19,186 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-07-20 22:20:19,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-07-20 22:20:19,368 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:20:19,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:20:19,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1146912830, now seen corresponding path program 4 times [2022-07-20 22:20:19,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:20:19,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855058457] [2022-07-20 22:20:19,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:20:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:20:19,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:20:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:20:19,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:20:19,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855058457] [2022-07-20 22:20:19,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855058457] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:20:19,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955951803] [2022-07-20 22:20:19,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-07-20 22:20:19,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:20:19,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:20:19,859 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) [2022-07-20 22:20:19,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-07-20 22:20:19,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-07-20 22:20:19,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:20:19,915 WARN L261 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 58 conjunts are in the unsatisfiable core [2022-07-20 22:20:19,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:20:19,925 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 11 treesize of output 7 [2022-07-20 22:20:19,954 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:20:20,017 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-20 22:20:20,070 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:20:20,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:20,189 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 24 [2022-07-20 22:20:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:20,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:20,271 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 34 [2022-07-20 22:20:20,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:20,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:20,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2022-07-20 22:20:20,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:20,676 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 28 [2022-07-20 22:20:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:20:20,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:20:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-07-20 22:20:21,653 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955951803] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:20:21,653 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:20:21,653 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 17] total 51 [2022-07-20 22:20:21,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040535270] [2022-07-20 22:20:21,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:20:21,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-07-20 22:20:21,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:20:21,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-07-20 22:20:21,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2265, Unknown=0, NotChecked=0, Total=2550 [2022-07-20 22:20:21,655 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 51 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 51 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:20:22,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:20:22,471 INFO L93 Difference]: Finished difference Result 115 states and 129 transitions. [2022-07-20 22:20:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-07-20 22:20:22,472 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 51 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2022-07-20 22:20:22,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:20:22,473 INFO L225 Difference]: With dead ends: 115 [2022-07-20 22:20:22,473 INFO L226 Difference]: Without dead ends: 113 [2022-07-20 22:20:22,475 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 1724 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=527, Invalid=4443, Unknown=0, NotChecked=0, Total=4970 [2022-07-20 22:20:22,475 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 173 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:20:22,476 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 161 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 173 Invalid, 0 Unknown, 153 Unchecked, 0.1s Time] [2022-07-20 22:20:22,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-07-20 22:20:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 85. [2022-07-20 22:20:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.1904761904761905) internal successors, (100), 84 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:20:22,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 100 transitions. [2022-07-20 22:20:22,491 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 100 transitions. Word has length 32 [2022-07-20 22:20:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:20:22,491 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 100 transitions. [2022-07-20 22:20:22,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6274509803921569) internal successors, (83), 51 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:20:22,492 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 100 transitions. [2022-07-20 22:20:22,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 22:20:22,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:20:22,492 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:20:22,515 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-07-20 22:20:22,711 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:20:22,711 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:20:22,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:20:22,712 INFO L85 PathProgramCache]: Analyzing trace with hash -1680698556, now seen corresponding path program 5 times [2022-07-20 22:20:22,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:20:22,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016751549] [2022-07-20 22:20:22,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:20:22,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:20:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:20:22,830 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:20:22,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:20:22,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016751549] [2022-07-20 22:20:22,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016751549] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:20:22,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586797716] [2022-07-20 22:20:22,831 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-07-20 22:20:22,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:20:22,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:20:22,832 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) [2022-07-20 22:20:22,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-07-20 22:20:22,907 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-07-20 22:20:22,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:20:22,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 11 conjunts are in the unsatisfiable core [2022-07-20 22:20:22,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:20:22,999 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:20:23,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:20:23,053 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-20 22:20:23,053 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586797716] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:20:23,053 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:20:23,053 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 22 [2022-07-20 22:20:23,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668730830] [2022-07-20 22:20:23,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:20:23,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-07-20 22:20:23,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:20:23,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-07-20 22:20:23,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-07-20 22:20:23,055 INFO L87 Difference]: Start difference. First operand 85 states and 100 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2022-07-20 22:20:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-20 22:20:23,292 INFO L93 Difference]: Finished difference Result 162 states and 178 transitions. [2022-07-20 22:20:23,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-20 22:20:23,293 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) Word has length 32 [2022-07-20 22:20:23,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-20 22:20:23,293 INFO L225 Difference]: With dead ends: 162 [2022-07-20 22:20:23,293 INFO L226 Difference]: Without dead ends: 96 [2022-07-20 22:20:23,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2022-07-20 22:20:23,295 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 183 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-07-20 22:20:23,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [183 Valid, 111 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-07-20 22:20:23,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-07-20 22:20:23,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 60. [2022-07-20 22:20:23,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 59 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:20:23,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-07-20 22:20:23,318 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 32 [2022-07-20 22:20:23,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-20 22:20:23,318 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-07-20 22:20:23,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 22 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) [2022-07-20 22:20:23,318 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-07-20 22:20:23,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-07-20 22:20:23,319 INFO L187 NwaCegarLoop]: Found error trace [2022-07-20 22:20:23,319 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-20 22:20:23,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-07-20 22:20:23,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-07-20 22:20:23,531 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-20 22:20:23,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-20 22:20:23,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1112184374, now seen corresponding path program 6 times [2022-07-20 22:20:23,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-20 22:20:23,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319006867] [2022-07-20 22:20:23,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-20 22:20:23,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-20 22:20:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-20 22:20:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:20:24,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-20 22:20:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319006867] [2022-07-20 22:20:24,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319006867] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-20 22:20:24,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332523617] [2022-07-20 22:20:24,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-07-20 22:20:24,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-20 22:20:24,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-20 22:20:24,111 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) [2022-07-20 22:20:24,112 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-07-20 22:20:24,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2022-07-20 22:20:24,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-20 22:20:24,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 62 conjunts are in the unsatisfiable core [2022-07-20 22:20:24,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-20 22:20:24,200 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 11 treesize of output 7 [2022-07-20 22:20:24,225 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:20:24,271 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:20:24,320 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-20 22:20:24,380 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 0 case distinctions, treesize of input 27 treesize of output 15 [2022-07-20 22:20:24,435 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 0 case distinctions, treesize of input 25 treesize of output 13 [2022-07-20 22:20:24,558 INFO L356 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2022-07-20 22:20:24,559 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 22 [2022-07-20 22:20:24,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:24,658 INFO L356 Elim1Store]: treesize reduction 33, result has 36.5 percent of original size [2022-07-20 22:20:24,658 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 44 [2022-07-20 22:20:24,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:24,731 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 [2022-07-20 22:20:24,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:24,781 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 [2022-07-20 22:20:24,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-07-20 22:20:24,873 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 [2022-07-20 22:20:25,022 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 20 [2022-07-20 22:20:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:20:25,068 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-20 22:21:20,062 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:21:20,063 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2022-07-20 22:21:20,070 INFO L356 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-07-20 22:21:20,070 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 1 [2022-07-20 22:21:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-20 22:21:20,071 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332523617] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-20 22:21:20,071 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-20 22:21:20,071 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27, 28] total 76 [2022-07-20 22:21:20,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716009517] [2022-07-20 22:21:20,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-20 22:21:20,072 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-07-20 22:21:20,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-20 22:21:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-07-20 22:21:20,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=576, Invalid=5084, Unknown=40, NotChecked=0, Total=5700 [2022-07-20 22:21:20,074 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 76 states, 76 states have (on average 1.118421052631579) internal successors, (85), 76 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-20 22:21:57,259 WARN L233 SmtUtils]: Spent 24.61s on a formula simplification. DAG size of input: 60 DAG size of output: 59 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-07-20 22:21:59,651 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|))) (let ((.cse0 (select .cse1 0))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_150| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_150|)) (forall ((|v_ULTIMATE.start_main_~i~0#1_149| Int) (v_ArrVal_486 Int) (v_ArrVal_484 Int)) (or (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_150| 1) |v_ULTIMATE.start_main_~i~0#1_149|)) (= c_~N~0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_150| 4)) v_ArrVal_484) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_149| 4)) v_ArrVal_486) |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (< |v_ULTIMATE.start_main_~i~0#1_149| c_~N~0)) (< (+ |v_ULTIMATE.start_main_~i~0#1_149| 1) c_~N~0))))) (<= .cse0 c_~N~0) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (<= c_~N~0 5) (<= c_~N~0 .cse0) (<= (+ 5 (div (* (- 1) |c_ULTIMATE.start_main_~a~0#1.offset|) 4)) c_~N~0) (= 5 (select .cse1 |c_ULTIMATE.start_main_~a~0#1.offset|))))) is different from false [2022-07-20 22:22:31,640 WARN L833 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_149| Int) (v_ArrVal_486 Int) (v_ArrVal_484 Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_149|)) (= c_~N~0 (select (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_484) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_149| 4)) v_ArrVal_486) |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (< |v_ULTIMATE.start_main_~i~0#1_149| c_~N~0)) (< (+ |v_ULTIMATE.start_main_~i~0#1_149| 1) c_~N~0))) (forall ((|v_ULTIMATE.start_main_~i~0#1_149| Int) (v_ArrVal_486 Int) (v_ArrVal_484 Int) (v_ArrVal_482 Int) (|v_ULTIMATE.start_main_~i~0#1_150| Int)) (or (not (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_150|)) (not (<= (+ |v_ULTIMATE.start_main_~i~0#1_150| 1) |v_ULTIMATE.start_main_~i~0#1_149|)) (= c_~N~0 (select (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_482) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_150| 4)) v_ArrVal_484) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_149| 4)) v_ArrVal_486) |c_ULTIMATE.start_main_~a~0#1.offset|)) (not (< |v_ULTIMATE.start_main_~i~0#1_149| c_~N~0)) (< (+ |v_ULTIMATE.start_main_~i~0#1_149| 1) c_~N~0))) (or (forall ((v_ArrVal_486 Int)) (= c_~N~0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ (* |c_ULTIMATE.start_main_~i~0#1| 4) |c_ULTIMATE.start_main_~a~0#1.offset|) v_ArrVal_486) |c_ULTIMATE.start_main_~a~0#1.offset|))) (< (+ |c_ULTIMATE.start_main_~i~0#1| 1) c_~N~0) (not (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0)))) is different from false