./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/nr4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/nr4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y --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 3219130777e42bfc39497c312a66c6d1b1af231a6df358861eaa545434d20cb1 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 17:49:16,699 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 17:49:16,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 17:49:16,774 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 17:49:16,775 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 17:49:16,781 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 17:49:16,783 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 17:49:16,788 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 17:49:16,791 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 17:49:16,799 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 17:49:16,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 17:49:16,803 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 17:49:16,804 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 17:49:16,807 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 17:49:16,810 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 17:49:16,815 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 17:49:16,817 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 17:49:16,819 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 17:49:16,822 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 17:49:16,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 17:49:16,834 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 17:49:16,836 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 17:49:16,840 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 17:49:16,841 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 17:49:16,852 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 17:49:16,853 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 17:49:16,854 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 17:49:16,856 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 17:49:16,857 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 17:49:16,859 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 17:49:16,860 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 17:49:16,861 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 17:49:16,864 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 17:49:16,866 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 17:49:16,868 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 17:49:16,868 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 17:49:16,869 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 17:49:16,870 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 17:49:16,870 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 17:49:16,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 17:49:16,873 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 17:49:16,874 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-13 17:49:16,928 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 17:49:16,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 17:49:16,929 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-13 17:49:16,930 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-13 17:49:16,931 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 17:49:16,931 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 17:49:16,933 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-13 17:49:16,933 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-13 17:49:16,933 INFO L138 SettingsManager]: * Use SBE=true [2021-11-13 17:49:16,934 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 17:49:16,935 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 17:49:16,935 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 17:49:16,936 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 17:49:16,936 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 17:49:16,937 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 17:49:16,937 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 17:49:16,937 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 17:49:16,938 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 17:49:16,938 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 17:49:16,938 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 17:49:16,939 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 17:49:16,939 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 17:49:16,939 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 17:49:16,940 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 17:49:16,940 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:49:16,940 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 17:49:16,941 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 17:49:16,941 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 17:49:16,941 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-13 17:49:16,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 17:49:16,942 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-13 17:49:16,942 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-13 17:49:16,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 17:49:16,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 17:49:16,944 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3219130777e42bfc39497c312a66c6d1b1af231a6df358861eaa545434d20cb1 [2021-11-13 17:49:17,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 17:49:17,336 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 17:49:17,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 17:49:17,341 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 17:49:17,342 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 17:49:17,344 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/../../sv-benchmarks/c/array-tiling/nr4.c [2021-11-13 17:49:17,448 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/data/dcf837cd7/e47337697de04c61aea9013512a2b1d9/FLAG04bc4a108 [2021-11-13 17:49:18,007 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 17:49:18,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/sv-benchmarks/c/array-tiling/nr4.c [2021-11-13 17:49:18,016 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/data/dcf837cd7/e47337697de04c61aea9013512a2b1d9/FLAG04bc4a108 [2021-11-13 17:49:18,354 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/data/dcf837cd7/e47337697de04c61aea9013512a2b1d9 [2021-11-13 17:49:18,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 17:49:18,359 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 17:49:18,361 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 17:49:18,361 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 17:49:18,379 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 17:49:18,380 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,381 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68a71213 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18, skipping insertion in model container [2021-11-13 17:49:18,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,399 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 17:49:18,412 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 17:49:18,650 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/sv-benchmarks/c/array-tiling/nr4.c[394,407] [2021-11-13 17:49:18,676 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:49:18,693 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 17:49:18,714 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/sv-benchmarks/c/array-tiling/nr4.c[394,407] [2021-11-13 17:49:18,724 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 17:49:18,741 INFO L208 MainTranslator]: Completed translation [2021-11-13 17:49:18,741 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18 WrapperNode [2021-11-13 17:49:18,742 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 17:49:18,743 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 17:49:18,743 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 17:49:18,744 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 17:49:18,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,762 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,819 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 17:49:18,820 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 17:49:18,820 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 17:49:18,821 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 17:49:18,833 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,833 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,840 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,841 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,862 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,869 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,872 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 17:49:18,873 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 17:49:18,873 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 17:49:18,873 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 17:49:18,882 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (1/1) ... [2021-11-13 17:49:18,892 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 17:49:18,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:18,926 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 17:49:18,945 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 17:49:18,988 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 17:49:18,989 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 17:49:18,989 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-13 17:49:18,989 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 17:49:18,989 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 17:49:18,989 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-13 17:49:18,990 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-13 17:49:19,370 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 17:49:19,371 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-13 17:49:19,373 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:49:19 BoogieIcfgContainer [2021-11-13 17:49:19,373 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 17:49:19,375 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 17:49:19,376 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 17:49:19,380 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 17:49:19,380 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 05:49:18" (1/3) ... [2021-11-13 17:49:19,381 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2f319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:49:19, skipping insertion in model container [2021-11-13 17:49:19,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 05:49:18" (2/3) ... [2021-11-13 17:49:19,382 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b2f319 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 05:49:19, skipping insertion in model container [2021-11-13 17:49:19,382 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 05:49:19" (3/3) ... [2021-11-13 17:49:19,383 INFO L111 eAbstractionObserver]: Analyzing ICFG nr4.c [2021-11-13 17:49:19,390 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 17:49:19,390 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-13 17:49:19,459 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 17:49:19,489 INFO L339 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-13 17:49:19,489 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-13 17:49:19,506 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:19,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 17:49:19,513 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:19,513 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:19,514 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:19,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:19,520 INFO L85 PathProgramCache]: Analyzing trace with hash -405965127, now seen corresponding path program 1 times [2021-11-13 17:49:19,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:19,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23694190] [2021-11-13 17:49:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:19,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:19,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:19,828 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:19,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23694190] [2021-11-13 17:49:19,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23694190] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:19,830 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:19,831 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-13 17:49:19,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443905606] [2021-11-13 17:49:19,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:19,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-13 17:49:19,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:19,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-13 17:49:19,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-13 17:49:19,880 INFO L87 Difference]: Start difference. First operand has 25 states, 23 states have (on average 1.565217391304348) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:19,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:19,898 INFO L93 Difference]: Finished difference Result 45 states and 64 transitions. [2021-11-13 17:49:19,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-13 17:49:19,903 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 17:49:19,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:19,911 INFO L225 Difference]: With dead ends: 45 [2021-11-13 17:49:19,911 INFO L226 Difference]: Without dead ends: 20 [2021-11-13 17:49:19,915 INFO L932 BasicCegarLoop]: 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 [2021-11-13 17:49:19,920 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.00ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.92ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.00ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:19,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.92ms Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.00ms Time] [2021-11-13 17:49:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-13 17:49:19,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-13 17:49:19,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:19,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-11-13 17:49:19,964 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2021-11-13 17:49:19,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:19,965 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-11-13 17:49:19,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:19,966 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-11-13 17:49:19,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 17:49:19,967 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:19,967 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:19,967 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 17:49:19,968 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:19,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:19,969 INFO L85 PathProgramCache]: Analyzing trace with hash 274093243, now seen corresponding path program 1 times [2021-11-13 17:49:19,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:19,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559431263] [2021-11-13 17:49:19,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:19,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:20,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:20,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559431263] [2021-11-13 17:49:20,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559431263] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:20,112 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:20,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 17:49:20,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680017608] [2021-11-13 17:49:20,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:20,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 17:49:20,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:20,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 17:49:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 17:49:20,120 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:20,167 INFO L93 Difference]: Finished difference Result 29 states and 34 transitions. [2021-11-13 17:49:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:49:20,168 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 17:49:20,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:20,170 INFO L225 Difference]: With dead ends: 29 [2021-11-13 17:49:20,170 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 17:49:20,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:20,173 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.11ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.19ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:20,174 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 62 Invalid, 15 Unknown, 0 Unchecked, 2.11ms Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 26.19ms Time] [2021-11-13 17:49:20,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 17:49:20,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-11-13 17:49:20,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:20,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-11-13 17:49:20,182 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 13 [2021-11-13 17:49:20,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:20,183 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-11-13 17:49:20,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-11-13 17:49:20,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-13 17:49:20,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:20,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:20,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 17:49:20,186 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:20,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:20,188 INFO L85 PathProgramCache]: Analyzing trace with hash 274152825, now seen corresponding path program 1 times [2021-11-13 17:49:20,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:20,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389921434] [2021-11-13 17:49:20,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:20,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:20,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:20,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:20,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389921434] [2021-11-13 17:49:20,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389921434] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:20,490 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:20,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-13 17:49:20,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600671596] [2021-11-13 17:49:20,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:20,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 17:49:20,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:20,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 17:49:20,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:20,493 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:20,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:20,578 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2021-11-13 17:49:20,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 17:49:20,579 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-13 17:49:20,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:20,581 INFO L225 Difference]: With dead ends: 38 [2021-11-13 17:49:20,581 INFO L226 Difference]: Without dead ends: 27 [2021-11-13 17:49:20,581 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-13 17:49:20,584 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 58 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 53.05ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.72ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 72.61ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:20,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 27 Invalid, 22 Unknown, 0 Unchecked, 2.72ms Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 72.61ms Time] [2021-11-13 17:49:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-13 17:49:20,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 23. [2021-11-13 17:49:20,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:20,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-13 17:49:20,593 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 13 [2021-11-13 17:49:20,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:20,593 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-13 17:49:20,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:20,594 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-13 17:49:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-13 17:49:20,595 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:20,595 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:20,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 17:49:20,596 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:20,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:20,597 INFO L85 PathProgramCache]: Analyzing trace with hash -715167033, now seen corresponding path program 1 times [2021-11-13 17:49:20,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:20,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479047410] [2021-11-13 17:49:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:20,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:20,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,651 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:20,652 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:20,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479047410] [2021-11-13 17:49:20,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479047410] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:20,653 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:20,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 17:49:20,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279573765] [2021-11-13 17:49:20,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:20,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 17:49:20,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:20,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 17:49:20,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:49:20,656 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:20,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:20,683 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2021-11-13 17:49:20,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 17:49:20,684 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-11-13 17:49:20,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:20,685 INFO L225 Difference]: With dead ends: 42 [2021-11-13 17:49:20,685 INFO L226 Difference]: Without dead ends: 26 [2021-11-13 17:49:20,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 17:49:20,688 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.12ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.38ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:20,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 11 Unknown, 0 Unchecked, 1.12ms Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 18.38ms Time] [2021-11-13 17:49:20,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-13 17:49:20,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2021-11-13 17:49:20,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 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) [2021-11-13 17:49:20,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-13 17:49:20,696 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 16 [2021-11-13 17:49:20,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:20,697 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-13 17:49:20,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:20,698 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-13 17:49:20,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-13 17:49:20,699 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:20,699 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:20,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 17:49:20,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:20,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:20,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1618667584, now seen corresponding path program 1 times [2021-11-13 17:49:20,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:20,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400273100] [2021-11-13 17:49:20,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:20,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:20,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:20,826 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:20,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400273100] [2021-11-13 17:49:20,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400273100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:20,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760772598] [2021-11-13 17:49:20,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:20,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:20,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:20,837 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:20,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 17:49:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:20,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 17:49:20,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:21,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:21,138 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:21,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760772598] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:49:21,249 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:49:21,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-11-13 17:49:21,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850163291] [2021-11-13 17:49:21,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:49:21,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 17:49:21,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:21,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 17:49:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:49:21,257 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:21,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:21,341 INFO L93 Difference]: Finished difference Result 50 states and 64 transitions. [2021-11-13 17:49:21,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 17:49:21,342 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-13 17:49:21,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:21,344 INFO L225 Difference]: With dead ends: 50 [2021-11-13 17:49:21,344 INFO L226 Difference]: Without dead ends: 33 [2021-11-13 17:49:21,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-13 17:49:21,347 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 18 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.44ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.40ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 52.02ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:21,348 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 52 Invalid, 28 Unknown, 0 Unchecked, 4.40ms Time], IncrementalHoareTripleChecker [5 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 52.02ms Time] [2021-11-13 17:49:21,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-13 17:49:21,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-13 17:49:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.25) internal successors, (40), 32 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 40 transitions. [2021-11-13 17:49:21,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 40 transitions. Word has length 19 [2021-11-13 17:49:21,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:21,357 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 40 transitions. [2021-11-13 17:49:21,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:21,358 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 40 transitions. [2021-11-13 17:49:21,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 17:49:21,359 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:21,360 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:21,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 17:49:21,588 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:21,588 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:21,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:21,589 INFO L85 PathProgramCache]: Analyzing trace with hash -2124634745, now seen corresponding path program 2 times [2021-11-13 17:49:21,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:21,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946765206] [2021-11-13 17:49:21,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:21,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:21,782 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:21,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:21,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946765206] [2021-11-13 17:49:21,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946765206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 17:49:21,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 17:49:21,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-13 17:49:21,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456525899] [2021-11-13 17:49:21,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 17:49:21,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 17:49:21,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:49:21,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 17:49:21,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:49:21,786 INFO L87 Difference]: Start difference. First operand 33 states and 40 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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) [2021-11-13 17:49:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:49:21,837 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2021-11-13 17:49:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-13 17:49:21,838 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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 28 [2021-11-13 17:49:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:49:21,839 INFO L225 Difference]: With dead ends: 66 [2021-11-13 17:49:21,839 INFO L226 Difference]: Without dead ends: 40 [2021-11-13 17:49:21,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-13 17:49:21,842 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.70ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.24ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.36ms IncrementalHoareTripleChecker+Time [2021-11-13 17:49:21,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 27 Invalid, 37 Unknown, 0 Unchecked, 1.24ms Time], IncrementalHoareTripleChecker [3 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 38.36ms Time] [2021-11-13 17:49:21,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-13 17:49:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-13 17:49:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:49:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-13 17:49:21,852 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 28 [2021-11-13 17:49:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:49:21,853 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-13 17:49:21,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 7 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) [2021-11-13 17:49:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-13 17:49:21,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-13 17:49:21,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:49:21,855 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:49:21,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-13 17:49:21,856 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:49:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:49:21,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1423570167, now seen corresponding path program 1 times [2021-11-13 17:49:21,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:49:21,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407101326] [2021-11-13 17:49:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:21,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:49:21,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:22,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:49:22,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407101326] [2021-11-13 17:49:22,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407101326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:49:22,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976567907] [2021-11-13 17:49:22,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:49:22,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:49:22,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:49:22,817 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:49:22,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 17:49:22,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:49:22,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 17:49:22,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:49:23,113 INFO L388 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 18 treesize of output 14 [2021-11-13 17:49:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:49:23,261 INFO L388 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 31 treesize of output 30 [2021-11-13 17:49:23,569 INFO L354 Elim1Store]: treesize reduction 116, result has 18.9 percent of original size [2021-11-13 17:49:23,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2021-11-13 17:49:23,962 INFO L354 Elim1Store]: treesize reduction 130, result has 29.3 percent of original size [2021-11-13 17:49:23,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 56 treesize of output 83 [2021-11-13 17:49:29,401 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:49:29,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:49:38,839 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_18| Int)) (let ((.cse0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_18| (- 4)) (* |c_ULTIMATE.start_main_~i~0#1| 16)) |v_ULTIMATE.start_main_~j~0#1_18|) |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse0) (= .cse0 0) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_18| 1))))) is different from false [2021-11-13 17:49:39,569 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_18| Int)) (let ((.cse0 (select (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse1) |c_ULTIMATE.start_main_~j~0#1|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_18| (- 4)) .cse1) |v_ULTIMATE.start_main_~j~0#1_18|)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (= .cse0 0) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_18| 1)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse0)))) is different from false [2021-11-13 17:50:17,819 INFO L388 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 85 treesize of output 81 [2021-11-13 17:50:17,826 INFO L388 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 833 treesize of output 825 [2021-11-13 17:50:20,594 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 10 not checked. [2021-11-13 17:50:20,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976567907] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:50:20,594 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:50:20,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 14] total 38 [2021-11-13 17:50:20,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119486525] [2021-11-13 17:50:20,595 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:50:20,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-13 17:50:20,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:20,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-13 17:50:20,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1049, Unknown=18, NotChecked=138, Total=1406 [2021-11-13 17:50:20,599 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 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) [2021-11-13 17:50:21,632 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (and (<= 4 (select (store .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse1) |c_ULTIMATE.start_main_~j~0#1|) 0)) (= |c_ULTIMATE.start_main_~i~0#1| 1) (<= |c_ULTIMATE.start_main_~j~0#1| 3) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (<= (+ |c_ULTIMATE.start_main_~j~0#1| 1) (div (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1) 4)) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 16) .cse1)) 4) (forall ((|v_ULTIMATE.start_main_~j~0#1_18| Int)) (let ((.cse2 (select (let ((.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse3) |c_ULTIMATE.start_main_~j~0#1|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_18| (- 4)) .cse3) |v_ULTIMATE.start_main_~j~0#1_18|)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (= .cse2 0) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_18| 1)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse2)))))) is different from false [2021-11-13 17:50:22,325 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (let ((.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse2)) (.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (<= 4 (select (store .cse0 .cse1 |c_ULTIMATE.start_main_~j~0#1|) 0)) (= |c_ULTIMATE.start_main_~i~0#1| 1) (<= |c_ULTIMATE.start_main_~j~0#1| 3) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= (select .cse0 .cse1) |c_ULTIMATE.start_main_~j~0#1|) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (<= (+ |c_ULTIMATE.start_main_~j~0#1| 1) (div (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse2) 4)) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 16) .cse2)) 4) (forall ((|v_ULTIMATE.start_main_~j~0#1_18| Int)) (let ((.cse3 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_18| (- 4)) (* |c_ULTIMATE.start_main_~i~0#1| 16)) |v_ULTIMATE.start_main_~j~0#1_18|) |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse3) (= .cse3 0) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_18| 1)))))))) is different from false [2021-11-13 17:50:23,553 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse5 (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (and (exists ((|ULTIMATE.start_main_~j~0#1| Int) (v_arrayElimCell_3 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (and (<= (+ |ULTIMATE.start_main_~j~0#1| 1) v_arrayElimCell_3) (= v_arrayElimCell_3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* v_arrayElimCell_3 (- 4)) .cse1))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (- 4)) .cse1)) |ULTIMATE.start_main_~j~0#1|) (<= v_arrayElimCell_3 3)))) (exists ((|v_ULTIMATE.start_main_~j~0#1_14| Int)) (and (= |v_ULTIMATE.start_main_~j~0#1_14| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_14| (- 4)) (* |c_ULTIMATE.start_main_~i~0#1| 16)))) (<= (+ |c_ULTIMATE.start_main_~j~0#1| 1) |v_ULTIMATE.start_main_~j~0#1_14|) (<= |v_ULTIMATE.start_main_~j~0#1_14| 3))) (<= 4 (select (store .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse3) |c_ULTIMATE.start_main_~j~0#1|) 0)) (let ((.cse4 (select .cse2 0))) (or (= 0 .cse4) (and (<= 4 .cse4) .cse5))) (= |c_ULTIMATE.start_main_~i~0#1| 1) .cse5 (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (= (select .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 16) .cse3)) 4) (forall ((|v_ULTIMATE.start_main_~j~0#1_18| Int)) (let ((.cse6 (select (let ((.cse7 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse7) |c_ULTIMATE.start_main_~j~0#1|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_18| (- 4)) .cse7) |v_ULTIMATE.start_main_~j~0#1_18|)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (= .cse6 0) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_18| 1)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse6)))))) is different from false [2021-11-13 17:50:24,547 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse3 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (and (exists ((|ULTIMATE.start_main_~j~0#1| Int) (v_arrayElimCell_3 Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (and (<= (+ |ULTIMATE.start_main_~j~0#1| 1) v_arrayElimCell_3) (= v_arrayElimCell_3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* v_arrayElimCell_3 (- 4)) .cse1))) (= (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |ULTIMATE.start_main_~j~0#1| (- 4)) .cse1)) |ULTIMATE.start_main_~j~0#1|) (<= v_arrayElimCell_3 3)))) (exists ((|v_ULTIMATE.start_main_~j~0#1_14| Int)) (and (= |v_ULTIMATE.start_main_~j~0#1_14| (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_14| (- 4)) (* |c_ULTIMATE.start_main_~i~0#1| 16)))) (<= (+ |c_ULTIMATE.start_main_~j~0#1| 1) |v_ULTIMATE.start_main_~j~0#1_14|) (<= |v_ULTIMATE.start_main_~j~0#1_14| 3))) (<= 4 (select (store .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse3) |c_ULTIMATE.start_main_~j~0#1|) 0)) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (= (select .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 16) .cse3)) 4) (forall ((|v_ULTIMATE.start_main_~j~0#1_18| Int)) (let ((.cse4 (select (let ((.cse5 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse5) |c_ULTIMATE.start_main_~j~0#1|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_18| (- 4)) .cse5) |v_ULTIMATE.start_main_~j~0#1_18|)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|))) (or (= .cse4 0) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_18| 1)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse4)))))) is different from false [2021-11-13 17:50:28,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:28,988 INFO L93 Difference]: Finished difference Result 124 states and 149 transitions. [2021-11-13 17:50:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-13 17:50:28,989 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-13 17:50:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:28,993 INFO L225 Difference]: With dead ends: 124 [2021-11-13 17:50:28,993 INFO L226 Difference]: Without dead ends: 92 [2021-11-13 17:50:28,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 57.0s TimeCoverageRelationStatistics Valid=334, Invalid=1736, Unknown=24, NotChecked=558, Total=2652 [2021-11-13 17:50:28,997 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 244.96ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.32ms SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 174 IncrementalHoareTripleChecker+Unchecked, 281.40ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:28,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 223 Invalid, 449 Unknown, 0 Unchecked, 4.32ms Time], IncrementalHoareTripleChecker [13 Valid, 262 Invalid, 0 Unknown, 174 Unchecked, 281.40ms Time] [2021-11-13 17:50:28,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-13 17:50:29,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-11-13 17:50:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:29,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-11-13 17:50:29,014 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 28 [2021-11-13 17:50:29,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:29,015 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-11-13 17:50:29,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.9736842105263157) internal successors, (75), 38 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) [2021-11-13 17:50:29,015 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-11-13 17:50:29,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 17:50:29,017 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:29,017 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:29,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:29,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:29,232 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1580642084, now seen corresponding path program 1 times [2021-11-13 17:50:29,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:29,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573573459] [2021-11-13 17:50:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:29,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:29,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:29,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573573459] [2021-11-13 17:50:29,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573573459] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:29,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366699056] [2021-11-13 17:50:29,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:29,825 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:29,832 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:29,848 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 17:50:29,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:29,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-13 17:50:29,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:30,051 INFO L388 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 18 treesize of output 14 [2021-11-13 17:50:30,179 INFO L354 Elim1Store]: treesize reduction 46, result has 20.7 percent of original size [2021-11-13 17:50:30,180 INFO L388 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 33 [2021-11-13 17:50:30,339 INFO L354 Elim1Store]: treesize reduction 74, result has 32.7 percent of original size [2021-11-13 17:50:30,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 57 [2021-11-13 17:50:33,415 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:33,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:39,954 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_27| Int)) (let ((.cse0 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_27| (- 4)) (* |c_ULTIMATE.start_main_~i~0#1| 16)) |v_ULTIMATE.start_main_~j~0#1_27|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_27| 1)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse0) (= .cse0 0)))) is different from false [2021-11-13 17:50:39,964 INFO L388 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 64 treesize of output 60 [2021-11-13 17:50:39,968 INFO L388 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 460 treesize of output 444 [2021-11-13 17:50:40,525 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 3 not checked. [2021-11-13 17:50:40,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366699056] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-13 17:50:40,526 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-13 17:50:40,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 15, 14] total 39 [2021-11-13 17:50:40,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023197009] [2021-11-13 17:50:40,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-13 17:50:40,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-13 17:50:40,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-13 17:50:40,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-13 17:50:40,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1220, Unknown=1, NotChecked=72, Total=1482 [2021-11-13 17:50:40,530 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:41,284 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (<= 3 |c_ULTIMATE.start_main_~j~0#1|) (= |c_ULTIMATE.start_main_~i~0#1| 1) .cse0 (= (select .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) (* |c_ULTIMATE.start_main_~i~0#1| 16))) |c_ULTIMATE.start_main_~j~0#1|) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (forall ((|v_ULTIMATE.start_main_~j~0#1_27| Int)) (let ((.cse2 (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_27| (- 4)) (* |c_ULTIMATE.start_main_~i~0#1| 16)) |v_ULTIMATE.start_main_~j~0#1_27|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)))) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_27| 1)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| .cse2) (= .cse2 0)))) (= 3 |c_ULTIMATE.start_main_~j~0#1|) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| 2) (= (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* 16 |c_ULTIMATE.start_main_~i~0#1|)) (+ 4 (* 4 |c_ULTIMATE.start_main_~j~0#1|))) (let ((.cse3 (select .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))))) (or (= .cse3 0) (and .cse0 (<= 3 .cse3)))))) is different from false [2021-11-13 17:50:42,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 17:50:42,285 INFO L93 Difference]: Finished difference Result 170 states and 205 transitions. [2021-11-13 17:50:42,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-13 17:50:42,286 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 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 34 [2021-11-13 17:50:42,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 17:50:42,288 INFO L225 Difference]: With dead ends: 170 [2021-11-13 17:50:42,288 INFO L226 Difference]: Without dead ends: 120 [2021-11-13 17:50:42,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 49 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=380, Invalid=2382, Unknown=2, NotChecked=206, Total=2970 [2021-11-13 17:50:42,292 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 76 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 236.30ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 4.03ms SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 161 IncrementalHoareTripleChecker+Unchecked, 267.86ms IncrementalHoareTripleChecker+Time [2021-11-13 17:50:42,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 271 Invalid, 421 Unknown, 0 Unchecked, 4.03ms Time], IncrementalHoareTripleChecker [31 Valid, 229 Invalid, 0 Unknown, 161 Unchecked, 267.86ms Time] [2021-11-13 17:50:42,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-13 17:50:42,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 73. [2021-11-13 17:50:42,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.1944444444444444) internal successors, (86), 72 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:42,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2021-11-13 17:50:42,312 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 34 [2021-11-13 17:50:42,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 17:50:42,313 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2021-11-13 17:50:42,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 39 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-13 17:50:42,314 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2021-11-13 17:50:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-13 17:50:42,315 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 17:50:42,315 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 17:50:42,360 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 17:50:42,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-13 17:50:42,540 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 17:50:42,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 17:50:42,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1973669094, now seen corresponding path program 1 times [2021-11-13 17:50:42,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-13 17:50:42,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405184771] [2021-11-13 17:50:42,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:42,541 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 17:50:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:43,194 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 17:50:43,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-13 17:50:43,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405184771] [2021-11-13 17:50:43,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405184771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 17:50:43,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422226785] [2021-11-13 17:50:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 17:50:43,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 17:50:43,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 [2021-11-13 17:50:43,201 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 17:50:43,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72c87b83-cd5c-432c-b612-831f061e158b/bin/uautomizer-YU5uOKAj3y/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 17:50:43,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 17:50:43,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-13 17:50:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 17:50:43,387 INFO L388 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 18 treesize of output 14 [2021-11-13 17:50:43,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-13 17:50:43,493 INFO L388 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 31 treesize of output 30 [2021-11-13 17:50:43,704 INFO L354 Elim1Store]: treesize reduction 116, result has 18.9 percent of original size [2021-11-13 17:50:43,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 53 treesize of output 55 [2021-11-13 17:50:44,047 INFO L354 Elim1Store]: treesize reduction 152, result has 17.4 percent of original size [2021-11-13 17:50:44,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 66 [2021-11-13 17:50:44,680 INFO L354 Elim1Store]: treesize reduction 84, result has 1.2 percent of original size [2021-11-13 17:50:44,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 76 treesize of output 44 [2021-11-13 17:50:44,743 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-13 17:50:44,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 17:50:52,293 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_35| Int)) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse0) |c_ULTIMATE.start_main_~j~0#1|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_35| (- 4)) .cse0) 0)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_35| 1)))) is different from false [2021-11-13 17:51:09,187 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_35| Int) (|v_ULTIMATE.start_main_~j~0#1_36| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_36| 1)) (< |v_ULTIMATE.start_main_~j~0#1_36| (+ |v_ULTIMATE.start_main_~j~0#1_35| 1)) (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~j~0#1| (- 4)) .cse0) |c_ULTIMATE.start_main_~j~0#1|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_36| (- 4)) .cse0) |v_ULTIMATE.start_main_~j~0#1_36|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_35| (- 4)) .cse0) 0)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)))) is different from false [2021-11-13 17:51:11,299 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~j~0#1_37| Int)) (or (< |c_ULTIMATE.start_main_~j~0#1| (+ |v_ULTIMATE.start_main_~j~0#1_37| 1)) (forall ((|v_ULTIMATE.start_main_~j~0#1_35| Int) (|v_ULTIMATE.start_main_~j~0#1_36| Int)) (or (<= |c_ULTIMATE.start_main_~MINVAL~0#1| (select (let ((.cse0 (* |c_ULTIMATE.start_main_~i~0#1| 16))) (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (* |v_ULTIMATE.start_main_~j~0#1_37| (- 4))) |v_ULTIMATE.start_main_~j~0#1_37|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_36| (- 4)) .cse0) |v_ULTIMATE.start_main_~j~0#1_36|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~j~0#1_35| (- 4)) .cse0) 0)) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (< |v_ULTIMATE.start_main_~j~0#1_36| (+ |v_ULTIMATE.start_main_~j~0#1_35| 1)) (< |v_ULTIMATE.start_main_~j~0#1_37| (+ |v_ULTIMATE.start_main_~j~0#1_36| 1)))))) is different from false [2021-11-13 17:51:11,315 INFO L388 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 63 treesize of output 61 [2021-11-13 17:51:11,326 INFO L388 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 27767 treesize of output 27639