./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/s1lif.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/s1lif.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF --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 cdcd45f06ced2bb4437693c85186d4d1862b19794596dce357397727796a8cdf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:38:25,662 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:38:25,664 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:38:25,694 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:38:25,695 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:38:25,696 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:38:25,698 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:38:25,700 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:38:25,703 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:38:25,704 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:38:25,705 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:38:25,707 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:38:25,708 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:38:25,709 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:38:25,710 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:38:25,712 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:38:25,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:38:25,714 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:38:25,716 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:38:25,719 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:38:25,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:38:25,723 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:38:25,724 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:38:25,726 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:38:25,731 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:38:25,736 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:38:25,736 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:38:25,737 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:38:25,739 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:38:25,740 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:38:25,741 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:38:25,742 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:38:25,744 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:38:25,746 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:38:25,747 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:38:25,748 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:38:25,748 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:38:25,749 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:38:25,749 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:38:25,750 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:38:25,751 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:38:25,751 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:38:25,779 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:38:25,779 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:38:25,780 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:38:25,780 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:38:25,781 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:38:25,781 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:38:25,782 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:38:25,782 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:38:25,782 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:38:25,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:38:25,783 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:38:25,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:38:25,783 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:38:25,783 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:38:25,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:38:25,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:38:25,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:38:25,784 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:38:25,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:38:25,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:38:25,785 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:38:25,785 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:38:25,786 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:38:25,786 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:38:25,786 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:38:25,786 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:38:25,787 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:38:25,787 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:38:25,787 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:38:25,787 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:38:25,787 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:38:25,788 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:38:25,788 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:38:25,788 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:38:25,788 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_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdcd45f06ced2bb4437693c85186d4d1862b19794596dce357397727796a8cdf [2021-11-20 07:38:26,028 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:38:26,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:38:26,053 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:38:26,054 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:38:26,055 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:38:26,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-fpi/s1lif.c [2021-11-20 07:38:26,149 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/data/2b45f63d0/fc0d11215fae4f3eb4ac77974790f24f/FLAG852997362 [2021-11-20 07:38:26,719 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:38:26,721 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/sv-benchmarks/c/array-fpi/s1lif.c [2021-11-20 07:38:26,741 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/data/2b45f63d0/fc0d11215fae4f3eb4ac77974790f24f/FLAG852997362 [2021-11-20 07:38:27,069 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/data/2b45f63d0/fc0d11215fae4f3eb4ac77974790f24f [2021-11-20 07:38:27,074 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:38:27,077 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:38:27,095 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:38:27,095 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:38:27,098 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:38:27,098 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,099 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16c36b39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27, skipping insertion in model container [2021-11-20 07:38:27,100 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,109 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:38:27,124 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:38:27,309 WARN L230 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_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/sv-benchmarks/c/array-fpi/s1lif.c[588,601] [2021-11-20 07:38:27,332 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:38:27,339 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:38:27,352 WARN L230 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_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/sv-benchmarks/c/array-fpi/s1lif.c[588,601] [2021-11-20 07:38:27,360 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:38:27,374 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:38:27,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27 WrapperNode [2021-11-20 07:38:27,375 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:38:27,376 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:38:27,376 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:38:27,376 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:38:27,384 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,396 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,420 INFO L137 Inliner]: procedures = 17, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 81 [2021-11-20 07:38:27,420 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:38:27,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:38:27,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:38:27,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:38:27,428 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,428 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,430 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,437 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,441 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,442 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:38:27,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:38:27,446 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:38:27,446 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:38:27,447 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (1/1) ... [2021-11-20 07:38:27,457 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:38:27,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:27,481 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:38:27,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:38:27,534 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:38:27,534 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:38:27,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-20 07:38:27,535 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 07:38:27,535 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 07:38:27,535 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:38:27,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:38:27,536 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 07:38:27,536 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 07:38:27,617 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:38:27,619 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:38:27,875 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:38:27,880 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:38:27,881 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 07:38:27,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:38:27 BoogieIcfgContainer [2021-11-20 07:38:27,882 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:38:27,884 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:38:27,884 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:38:27,901 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:38:27,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:38:27" (1/3) ... [2021-11-20 07:38:27,902 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474ae2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:38:27, skipping insertion in model container [2021-11-20 07:38:27,902 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:38:27" (2/3) ... [2021-11-20 07:38:27,903 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@474ae2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:38:27, skipping insertion in model container [2021-11-20 07:38:27,903 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:38:27" (3/3) ... [2021-11-20 07:38:27,904 INFO L111 eAbstractionObserver]: Analyzing ICFG s1lif.c [2021-11-20 07:38:27,909 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:38:27,910 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:38:27,959 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:38:27,966 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 [2021-11-20 07:38:27,967 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:38:27,982 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:27,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:38:27,988 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:27,988 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:27,989 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:27,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:27,995 INFO L85 PathProgramCache]: Analyzing trace with hash -845640729, now seen corresponding path program 1 times [2021-11-20 07:38:28,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:28,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618153159] [2021-11-20 07:38:28,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:28,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:28,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:28,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:28,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618153159] [2021-11-20 07:38:28,178 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618153159] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:28,179 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:28,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 07:38:28,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490301570] [2021-11-20 07:38:28,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:28,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 07:38:28,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:28,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 07:38:28,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 07:38:28,223 INFO L87 Difference]: Start difference. First operand has 22 states, 20 states have (on average 1.55) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2021-11-20 07:38:28,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:28,242 INFO L93 Difference]: Finished difference Result 40 states and 56 transitions. [2021-11-20 07:38:28,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 07:38:28,249 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 [2021-11-20 07:38:28,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:28,258 INFO L225 Difference]: With dead ends: 40 [2021-11-20 07:38:28,259 INFO L226 Difference]: Without dead ends: 18 [2021-11-20 07:38:28,262 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 [2021-11-20 07:38:28,269 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:28,272 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 07:38:28,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-20 07:38:28,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-20 07:38:28,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:28,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-11-20 07:38:28,310 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 13 [2021-11-20 07:38:28,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:28,310 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-11-20 07:38:28,311 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) [2021-11-20 07:38:28,312 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-11-20 07:38:28,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-20 07:38:28,312 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:28,313 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:28,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:38:28,314 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:28,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:28,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1238667739, now seen corresponding path program 1 times [2021-11-20 07:38:28,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:28,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797740400] [2021-11-20 07:38:28,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:28,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:28,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:28,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:28,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797740400] [2021-11-20 07:38:28,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1797740400] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 07:38:28,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:38:28,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 07:38:28,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743571228] [2021-11-20 07:38:28,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 07:38:28,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 07:38:28,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:28,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 07:38:28,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:38:28,447 INFO L87 Difference]: Start difference. First operand 18 states and 21 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) [2021-11-20 07:38:28,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:28,547 INFO L93 Difference]: Finished difference Result 36 states and 45 transitions. [2021-11-20 07:38:28,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 07:38:28,548 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 [2021-11-20 07:38:28,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:28,549 INFO L225 Difference]: With dead ends: 36 [2021-11-20 07:38:28,549 INFO L226 Difference]: Without dead ends: 25 [2021-11-20 07:38:28,550 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-20 07:38:28,552 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:28,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 11 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-20 07:38:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-11-20 07:38:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 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) [2021-11-20 07:38:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-20 07:38:28,559 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-11-20 07:38:28,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:28,560 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-20 07:38:28,560 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) [2021-11-20 07:38:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-20 07:38:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 07:38:28,561 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:28,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:28,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 07:38:28,562 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:28,563 INFO L85 PathProgramCache]: Analyzing trace with hash 2001188913, now seen corresponding path program 1 times [2021-11-20 07:38:28,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:28,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591821275] [2021-11-20 07:38:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:28,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:28,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:29,596 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:29,596 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:29,597 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591821275] [2021-11-20 07:38:29,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591821275] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:29,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432152685] [2021-11-20 07:38:29,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:29,599 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:29,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:29,605 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:29,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 07:38:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:29,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-20 07:38:29,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:29,796 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 10 treesize of output 8 [2021-11-20 07:38:29,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 07:38:29,882 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 23 treesize of output 22 [2021-11-20 07:38:30,453 INFO L354 Elim1Store]: treesize reduction 53, result has 1.9 percent of original size [2021-11-20 07:38:30,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 34 [2021-11-20 07:38:30,646 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-20 07:38:30,646 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 2 case distinctions, treesize of input 40 treesize of output 27 [2021-11-20 07:38:30,787 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 07:38:30,788 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 30 [2021-11-20 07:38:30,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:30,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:31,272 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:38:31,272 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 380 treesize of output 316 [2021-11-20 07:38:31,289 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 07:38:31,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 316 treesize of output 296 [2021-11-20 07:38:31,304 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 416 treesize of output 398 [2021-11-20 07:38:31,324 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 392 treesize of output 390 [2021-11-20 07:38:31,344 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 207 treesize of output 205 [2021-11-20 07:38:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:31,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432152685] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:31,562 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:31,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 33 [2021-11-20 07:38:31,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316221543] [2021-11-20 07:38:31,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:31,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-20 07:38:31,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:31,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-20 07:38:31,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-11-20 07:38:31,569 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:32,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:32,239 INFO L93 Difference]: Finished difference Result 44 states and 53 transitions. [2021-11-20 07:38:32,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-20 07:38:32,240 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-20 07:38:32,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:32,242 INFO L225 Difference]: With dead ends: 44 [2021-11-20 07:38:32,242 INFO L226 Difference]: Without dead ends: 39 [2021-11-20 07:38:32,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=279, Invalid=1281, Unknown=0, NotChecked=0, Total=1560 [2021-11-20 07:38:32,245 INFO L933 BasicCegarLoop]: 7 mSDtfsCounter, 18 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 141 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 37 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:32,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 53 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 141 Invalid, 0 Unknown, 37 Unchecked, 0.2s Time] [2021-11-20 07:38:32,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-11-20 07:38:32,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2021-11-20 07:38:32,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:32,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2021-11-20 07:38:32,254 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 20 [2021-11-20 07:38:32,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:32,255 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2021-11-20 07:38:32,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5454545454545454) internal successors, (51), 33 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:32,255 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2021-11-20 07:38:32,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 07:38:32,256 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:32,257 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:32,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:32,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:32,485 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:32,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:32,485 INFO L85 PathProgramCache]: Analyzing trace with hash 1608161903, now seen corresponding path program 1 times [2021-11-20 07:38:32,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:32,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116651181] [2021-11-20 07:38:32,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:32,486 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:32,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:32,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:32,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116651181] [2021-11-20 07:38:32,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116651181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:32,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997599916] [2021-11-20 07:38:32,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:32,601 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:32,602 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:32,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 07:38:32,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:32,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:38:32,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:32,684 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 11 treesize of output 7 [2021-11-20 07:38:32,718 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 15 treesize of output 7 [2021-11-20 07:38:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:32,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:32,790 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 14 treesize of output 12 [2021-11-20 07:38:32,792 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 22 treesize of output 20 [2021-11-20 07:38:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:32,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997599916] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:32,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:32,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 10 [2021-11-20 07:38:32,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876391942] [2021-11-20 07:38:32,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:32,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-20 07:38:32,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:32,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-20 07:38:32,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-20 07:38:32,811 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:32,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:32,898 INFO L93 Difference]: Finished difference Result 49 states and 60 transitions. [2021-11-20 07:38:32,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:38:32,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-20 07:38:32,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:32,901 INFO L225 Difference]: With dead ends: 49 [2021-11-20 07:38:32,901 INFO L226 Difference]: Without dead ends: 38 [2021-11-20 07:38:32,903 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-11-20 07:38:32,907 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:32,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 56 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:32,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-20 07:38:32,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 35. [2021-11-20 07:38:32,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:32,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2021-11-20 07:38:32,930 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 20 [2021-11-20 07:38:32,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:32,933 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2021-11-20 07:38:32,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:32,934 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2021-11-20 07:38:32,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:38:32,935 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:32,935 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:32,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:33,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:33,136 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:33,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:33,137 INFO L85 PathProgramCache]: Analyzing trace with hash -949569453, now seen corresponding path program 2 times [2021-11-20 07:38:33,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:33,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468826344] [2021-11-20 07:38:33,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:33,137 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:33,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:33,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:33,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468826344] [2021-11-20 07:38:33,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468826344] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:33,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869744313] [2021-11-20 07:38:33,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:38:33,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:33,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:33,221 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:33,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 07:38:33,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:38:33,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:33,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:38:33,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:33,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:33,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:33,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869744313] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:33,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:33,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-20 07:38:33,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081088171] [2021-11-20 07:38:33,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:33,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:38:33,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:33,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:38:33,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:38:33,438 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:33,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:33,555 INFO L93 Difference]: Finished difference Result 70 states and 81 transitions. [2021-11-20 07:38:33,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:38:33,556 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 07:38:33,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:33,557 INFO L225 Difference]: With dead ends: 70 [2021-11-20 07:38:33,557 INFO L226 Difference]: Without dead ends: 44 [2021-11-20 07:38:33,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:38:33,559 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:33,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 28 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:33,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-20 07:38:33,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-11-20 07:38:33,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:33,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-20 07:38:33,565 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2021-11-20 07:38:33,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:33,566 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-20 07:38:33,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 11 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:33,566 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-20 07:38:33,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-20 07:38:33,567 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:33,567 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:33,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:33,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:33,784 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:33,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:33,784 INFO L85 PathProgramCache]: Analyzing trace with hash -2105967953, now seen corresponding path program 3 times [2021-11-20 07:38:33,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:33,785 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843018815] [2021-11-20 07:38:33,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:33,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:33,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:33,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:33,835 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:33,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843018815] [2021-11-20 07:38:33,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843018815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:33,835 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453379872] [2021-11-20 07:38:33,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:38:33,836 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:33,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:33,837 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:33,841 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 07:38:33,886 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 07:38:33,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:33,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 07:38:33,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:33,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:33,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:38:34,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453379872] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:34,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:34,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2021-11-20 07:38:34,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895674260] [2021-11-20 07:38:34,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:34,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:38:34,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:34,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:38:34,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:38:34,060 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:34,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:34,183 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2021-11-20 07:38:34,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 07:38:34,183 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-20 07:38:34,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:34,186 INFO L225 Difference]: With dead ends: 39 [2021-11-20 07:38:34,186 INFO L226 Difference]: Without dead ends: 31 [2021-11-20 07:38:34,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-11-20 07:38:34,188 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 61 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:34,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 18 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:34,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-20 07:38:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2021-11-20 07:38:34,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:34,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-11-20 07:38:34,199 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 22 [2021-11-20 07:38:34,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:34,200 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-11-20 07:38:34,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:34,201 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-11-20 07:38:34,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-20 07:38:34,204 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:34,205 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:34,242 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:34,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:34,424 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:34,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:34,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1032594067, now seen corresponding path program 4 times [2021-11-20 07:38:34,425 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:34,425 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410618891] [2021-11-20 07:38:34,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:34,425 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:34,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:35,371 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:35,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:35,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410618891] [2021-11-20 07:38:35,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1410618891] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:35,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458628168] [2021-11-20 07:38:35,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:38:35,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:35,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:35,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:35,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 07:38:35,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:38:35,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:35,423 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-20 07:38:35,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:35,445 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 10 treesize of output 8 [2021-11-20 07:38:35,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 07:38:35,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:35,478 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 23 treesize of output 22 [2021-11-20 07:38:35,589 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:35,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-20 07:38:35,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:35,951 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:38:35,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 39 [2021-11-20 07:38:36,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:36,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-20 07:38:36,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:36,301 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:36,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-11-20 07:38:36,464 INFO L354 Elim1Store]: treesize reduction 76, result has 16.5 percent of original size [2021-11-20 07:38:36,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 51 treesize of output 37 [2021-11-20 07:38:36,620 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:36,621 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:38,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458628168] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:38,154 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:38,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 49 [2021-11-20 07:38:38,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206139565] [2021-11-20 07:38:38,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:38,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 07:38:38,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:38,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 07:38:38,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=2015, Unknown=0, NotChecked=0, Total=2352 [2021-11-20 07:38:38,157 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:44,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:44,309 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2021-11-20 07:38:44,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 07:38:44,309 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-20 07:38:44,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:44,310 INFO L225 Difference]: With dead ends: 77 [2021-11-20 07:38:44,310 INFO L226 Difference]: Without dead ends: 62 [2021-11-20 07:38:44,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=758, Invalid=4212, Unknown=0, NotChecked=0, Total=4970 [2021-11-20 07:38:44,314 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 52 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 28 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:44,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [52 Valid, 102 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 664 Invalid, 0 Unknown, 28 Unchecked, 1.2s Time] [2021-11-20 07:38:44,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-20 07:38:44,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2021-11-20 07:38:44,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2045454545454546) internal successors, (53), 44 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:44,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 53 transitions. [2021-11-20 07:38:44,322 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 53 transitions. Word has length 27 [2021-11-20 07:38:44,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:44,323 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 53 transitions. [2021-11-20 07:38:44,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.346938775510204) internal successors, (66), 49 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:44,323 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 53 transitions. [2021-11-20 07:38:44,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 07:38:44,324 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:44,324 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:44,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:44,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 07:38:44,552 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:44,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:44,553 INFO L85 PathProgramCache]: Analyzing trace with hash -132219249, now seen corresponding path program 5 times [2021-11-20 07:38:44,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:44,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971233998] [2021-11-20 07:38:44,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:44,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:44,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:44,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:38:44,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:44,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971233998] [2021-11-20 07:38:44,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971233998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:44,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821047127] [2021-11-20 07:38:44,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:38:44,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:44,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:44,628 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:44,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 07:38:44,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-20 07:38:44,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:44,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:38:44,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:44,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:38:44,804 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-20 07:38:44,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821047127] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:44,885 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:44,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-20 07:38:44,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061599641] [2021-11-20 07:38:44,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:44,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:38:44,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:44,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:38:44,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:38:44,888 INFO L87 Difference]: Start difference. First operand 45 states and 53 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:45,033 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2021-11-20 07:38:45,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 07:38:45,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-20 07:38:45,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:45,034 INFO L225 Difference]: With dead ends: 89 [2021-11-20 07:38:45,034 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 07:38:45,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:38:45,036 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:45,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 33 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:45,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 07:38:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 41. [2021-11-20 07:38:45,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.15) internal successors, (46), 40 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2021-11-20 07:38:45,041 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 29 [2021-11-20 07:38:45,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:45,042 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2021-11-20 07:38:45,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:45,042 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2021-11-20 07:38:45,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 07:38:45,043 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:45,043 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:45,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:45,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:45,268 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:45,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1034208275, now seen corresponding path program 1 times [2021-11-20 07:38:45,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:45,269 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725430622] [2021-11-20 07:38:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:45,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:45,365 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:38:45,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:45,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725430622] [2021-11-20 07:38:45,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725430622] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:45,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81229838] [2021-11-20 07:38:45,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:45,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:45,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:45,367 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:45,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 07:38:45,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:45,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:38:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:45,539 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:38:45,539 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:38:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 07:38:45,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81229838] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:38:45,621 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:38:45,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2021-11-20 07:38:45,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173115744] [2021-11-20 07:38:45,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:38:45,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-20 07:38:45,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:38:45,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-20 07:38:45,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-20 07:38:45,623 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:38:45,776 INFO L93 Difference]: Finished difference Result 50 states and 56 transitions. [2021-11-20 07:38:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-20 07:38:45,777 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-20 07:38:45,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:38:45,777 INFO L225 Difference]: With dead ends: 50 [2021-11-20 07:38:45,777 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 07:38:45,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-11-20 07:38:45,779 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:38:45,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 27 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:38:45,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 07:38:45,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2021-11-20 07:38:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:45,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2021-11-20 07:38:45,785 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 29 [2021-11-20 07:38:45,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:38:45,785 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2021-11-20 07:38:45,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:38:45,785 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2021-11-20 07:38:45,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:38:45,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:38:45,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:38:45,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:38:46,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:46,004 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:38:46,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:38:46,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1250534543, now seen corresponding path program 6 times [2021-11-20 07:38:46,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:38:46,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496870515] [2021-11-20 07:38:46,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:38:46,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:38:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:38:47,545 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:38:47,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:38:47,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496870515] [2021-11-20 07:38:47,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496870515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:38:47,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097050201] [2021-11-20 07:38:47,545 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:38:47,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:38:47,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:38:47,548 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:38:47,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 07:38:47,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-20 07:38:47,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:38:47,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-20 07:38:47,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:38:47,625 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 11 treesize of output 7 [2021-11-20 07:38:47,630 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 10 treesize of output 8 [2021-11-20 07:38:47,678 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 23 treesize of output 22 [2021-11-20 07:38:47,771 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 07:38:47,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-11-20 07:38:47,869 INFO L354 Elim1Store]: treesize reduction 37, result has 22.9 percent of original size [2021-11-20 07:38:47,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 36 [2021-11-20 07:38:48,125 INFO L354 Elim1Store]: treesize reduction 47, result has 28.8 percent of original size [2021-11-20 07:38:48,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 49 [2021-11-20 07:38:48,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:48,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 42 [2021-11-20 07:38:48,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:48,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:48,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:48,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 60 treesize of output 49 [2021-11-20 07:38:48,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:38:48,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:48,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:48,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:48,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 58 treesize of output 51 [2021-11-20 07:38:49,044 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:49,045 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:38:49,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:49,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:38:49,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 54 [2021-11-20 07:38:49,256 INFO L354 Elim1Store]: treesize reduction 114, result has 16.2 percent of original size [2021-11-20 07:38:49,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 70 treesize of output 51 [2021-11-20 07:38:49,407 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-20 07:38:49,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 51 [2021-11-20 07:38:49,464 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 3 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:38:49,464 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:41:05,527 WARN L838 $PredicateComparison]: unable to prove that (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_110| Int) (|v_ULTIMATE.start_main_~i~0#1_112| Int)) (let ((.cse14 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) 1) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) 1) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_110| 4)) 1))) (let ((.cse1 (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse13 (store .cse14 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse1 1))) (.cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse12 (select .cse13 .cse9))) (let ((.cse11 (store .cse13 .cse9 (+ .cse12 1))) (.cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (let ((.cse0 (select .cse11 .cse8))) (or (not (= .cse0 1)) (not (= .cse1 1)) (let ((.cse10 (store .cse11 .cse8 (+ .cse0 1)))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse10))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse5 (select .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse2 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (and (<= 3 (div (+ .cse2 .cse3 .cse4 .cse5) 2)) (<= (div (+ .cse2 (- 1) .cse3 .cse4 .cse5) 2) 2)))))))) (not (= .cse12 1)))))))))) is different from false [2021-11-20 07:41:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 25 refuted. 2 times theorem prover too weak. 0 trivial. 3 not checked. [2021-11-20 07:41:05,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097050201] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:41:05,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:41:05,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 22, 24] total 66 [2021-11-20 07:41:05,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192220423] [2021-11-20 07:41:05,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:41:05,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-20 07:41:05,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:41:05,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-20 07:41:05,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=535, Invalid=3576, Unknown=53, NotChecked=126, Total=4290 [2021-11-20 07:41:05,567 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 66 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 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) [2021-11-20 07:41:07,753 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~a~0#1.offset| 0) (forall ((|ULTIMATE.start_main_~i~0#1| Int) (|v_ULTIMATE.start_main_~i~0#1_110| Int) (|v_ULTIMATE.start_main_~i~0#1_112| Int)) (let ((.cse14 (store (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |ULTIMATE.start_main_~i~0#1| 4)) 1) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_112| 4)) 1) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_110| 4)) 1))) (let ((.cse1 (select .cse14 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse13 (store .cse14 |c_ULTIMATE.start_main_~a~0#1.offset| (+ .cse1 1))) (.cse9 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 4))) (let ((.cse12 (select .cse13 .cse9))) (let ((.cse11 (store .cse13 .cse9 (+ .cse12 1))) (.cse8 (+ |c_ULTIMATE.start_main_~a~0#1.offset| 8))) (let ((.cse0 (select .cse11 .cse8))) (or (not (= .cse0 1)) (not (= .cse1 1)) (let ((.cse10 (store .cse11 .cse8 (+ .cse0 1)))) (let ((.cse6 (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| .cse10))) (let ((.cse7 (select .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base|))) (let ((.cse3 (select .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset|)) (.cse5 (select .cse10 |c_ULTIMATE.start_main_~a~0#1.offset|))) (let ((.cse4 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse9))) (let ((.cse2 (select (select (store .cse6 |c_ULTIMATE.start_main_~#sum~0#1.base| (store .cse7 |c_ULTIMATE.start_main_~#sum~0#1.offset| (+ .cse3 .cse4 .cse5))) |c_ULTIMATE.start_main_~a~0#1.base|) .cse8))) (and (<= 3 (div (+ .cse2 .cse3 .cse4 .cse5) 2)) (<= (div (+ .cse2 (- 1) .cse3 .cse4 .cse5) 2) 2)))))))) (not (= .cse12 1)))))))))) (= |c_ULTIMATE.start_main_~i~0#1| 0) (not (= |c_ULTIMATE.start_main_~#sum~0#1.base| |c_ULTIMATE.start_main_~a~0#1.base|)) (= (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base| (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 1)) |c_ULTIMATE.start_main_~#sum~0#1.base|) |c_ULTIMATE.start_main_~#sum~0#1.offset|) 0)) is different from false [2021-11-20 07:41:39,013 WARN L227 SmtUtils]: Spent 11.00s on a formula simplification. DAG size of input: 195 DAG size of output: 164 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:41:55,288 WARN L227 SmtUtils]: Spent 11.87s on a formula simplification. DAG size of input: 201 DAG size of output: 172 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:42:11,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:11,477 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2021-11-20 07:42:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-20 07:42:11,478 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 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) Word has length 34 [2021-11-20 07:42:11,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:11,479 INFO L225 Difference]: With dead ends: 108 [2021-11-20 07:42:11,479 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 07:42:11,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 26 SyntacticMatches, 6 SemanticMatches, 113 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 4109 ImplicationChecksByTransitivity, 199.5s TimeCoverageRelationStatistics Valid=1621, Invalid=10979, Unknown=64, NotChecked=446, Total=13110 [2021-11-20 07:42:11,483 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 68 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 690 mSolverCounterSat, 352 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 352 IncrementalHoareTripleChecker+Valid, 690 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 265 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:11,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 123 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [352 Valid, 690 Invalid, 0 Unknown, 265 Unchecked, 3.1s Time] [2021-11-20 07:42:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 07:42:11,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 64. [2021-11-20 07:42:11,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 63 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2021-11-20 07:42:11,508 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 34 [2021-11-20 07:42:11,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:11,509 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2021-11-20 07:42:11,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.303030303030303) internal successors, (86), 66 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) [2021-11-20 07:42:11,509 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2021-11-20 07:42:11,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:42:11,514 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:11,514 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:11,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:11,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-20 07:42:11,728 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:11,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:11,729 INFO L85 PathProgramCache]: Analyzing trace with hash 2033315503, now seen corresponding path program 2 times [2021-11-20 07:42:11,729 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:11,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306630262] [2021-11-20 07:42:11,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:11,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:11,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:11,873 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:42:11,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:11,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306630262] [2021-11-20 07:42:11,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306630262] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:42:11,873 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415257361] [2021-11-20 07:42:11,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:42:11,874 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:11,874 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:11,874 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:11,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 07:42:11,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:42:11,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:42:11,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:42:11,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:11,986 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 13 treesize of output 9 [2021-11-20 07:42:12,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:12,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:42:12,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-20 07:42:12,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:12,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 07:42:12,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 26 [2021-11-20 07:42:12,144 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 15 treesize of output 7 [2021-11-20 07:42:12,168 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:42:12,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:12,307 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 16 treesize of output 14 [2021-11-20 07:42:12,309 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 28 treesize of output 24 [2021-11-20 07:42:12,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:42:12,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415257361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:42:12,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:42:12,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 19 [2021-11-20 07:42:12,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901786070] [2021-11-20 07:42:12,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:12,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-20 07:42:12,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:12,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-20 07:42:12,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-11-20 07:42:12,356 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:12,574 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2021-11-20 07:42:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-20 07:42:12,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 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 [2021-11-20 07:42:12,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:12,576 INFO L225 Difference]: With dead ends: 98 [2021-11-20 07:42:12,576 INFO L226 Difference]: Without dead ends: 75 [2021-11-20 07:42:12,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 54 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:42:12,577 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:12,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 72 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:42:12,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-11-20 07:42:12,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 66. [2021-11-20 07:42:12,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.2) internal successors, (78), 65 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:12,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 78 transitions. [2021-11-20 07:42:12,592 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 78 transitions. Word has length 34 [2021-11-20 07:42:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:12,593 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 78 transitions. [2021-11-20 07:42:12,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 19 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 78 transitions. [2021-11-20 07:42:12,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-20 07:42:12,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:12,594 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:12,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:12,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:12,796 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:12,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1456084851, now seen corresponding path program 3 times [2021-11-20 07:42:12,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:12,797 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596485503] [2021-11-20 07:42:12,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:12,797 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:12,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:42:13,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:13,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596485503] [2021-11-20 07:42:13,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596485503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:42:13,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581949561] [2021-11-20 07:42:13,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:42:13,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:13,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:13,053 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:13,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 07:42:13,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 07:42:13,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:42:13,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-20 07:42:13,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:13,162 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 15 treesize of output 11 [2021-11-20 07:42:13,203 INFO L354 Elim1Store]: treesize reduction 40, result has 23.1 percent of original size [2021-11-20 07:42:13,203 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 28 treesize of output 27 [2021-11-20 07:42:13,460 INFO L354 Elim1Store]: treesize reduction 129, result has 15.7 percent of original size [2021-11-20 07:42:13,460 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 5 case distinctions, treesize of input 63 treesize of output 57 [2021-11-20 07:42:13,518 INFO L354 Elim1Store]: treesize reduction 24, result has 52.9 percent of original size [2021-11-20 07:42:13,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 47 [2021-11-20 07:42:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 07:42:13,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:14,659 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (<= (+ 3 |v_ULTIMATE.start_main_~i~0#1_142|) c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_142| 1)) (= (select (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4))) 1))) is different from false [2021-11-20 07:42:15,913 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (<= (+ 3 |v_ULTIMATE.start_main_~i~0#1_142|) c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_142| 1)) (= (select (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4))) 1))) (< 0 |v_ULTIMATE.start_main_~i~0#1_143|))) is different from false [2021-11-20 07:42:22,770 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int) (|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (= (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4))) 1) (< 0 |v_ULTIMATE.start_main_~i~0#1_143|) (<= |c_ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_main_~i~0#1_142|) (<= (+ 2 |v_ULTIMATE.start_main_~i~0#1_142|) |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2021-11-20 07:42:23,611 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int) (|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_142|) (< 0 |v_ULTIMATE.start_main_~i~0#1_143|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_142| 1) |c_ULTIMATE.start_main_~i~0#1|) (= (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4) 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4))) 1))) is different from false [2021-11-20 07:42:23,623 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 72 treesize of output 68 [2021-11-20 07:42:23,633 INFO L354 Elim1Store]: treesize reduction 12, result has 25.0 percent of original size [2021-11-20 07:42:23,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 347 treesize of output 321 [2021-11-20 07:42:23,715 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 9 trivial. 10 not checked. [2021-11-20 07:42:23,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581949561] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:42:23,716 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:42:23,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 16] total 34 [2021-11-20 07:42:23,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018235753] [2021-11-20 07:42:23,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:23,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-20 07:42:23,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:23,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-20 07:42:23,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=715, Unknown=8, NotChecked=236, Total=1122 [2021-11-20 07:42:23,718 INFO L87 Difference]: Start difference. First operand 66 states and 78 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:24,680 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1) (<= 1 |c_ULTIMATE.start_main_~i~0#1|) (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int) (|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_142|) (< 0 |v_ULTIMATE.start_main_~i~0#1_143|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_142| 1) |c_ULTIMATE.start_main_~i~0#1|) (= (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4) 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4))) 1)))) is different from false [2021-11-20 07:42:25,445 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1) (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int) (|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (= (select (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 1)) (.cse1 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4)))) (store .cse0 .cse1 (+ (select .cse0 .cse1) 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4))) 1) (< 0 |v_ULTIMATE.start_main_~i~0#1_143|) (<= |c_ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_main_~i~0#1_142|) (<= (+ 2 |v_ULTIMATE.start_main_~i~0#1_142|) |c_ULTIMATE.start_main_~i~0#1|))) (<= 2 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-11-20 07:42:26,222 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4))) (and (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) 1) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) .cse1)) 1) (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int) (|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) |v_ULTIMATE.start_main_~i~0#1_142|) (< 0 |v_ULTIMATE.start_main_~i~0#1_143|) (<= (+ |v_ULTIMATE.start_main_~i~0#1_142| 1) |c_ULTIMATE.start_main_~i~0#1|) (= (select (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4) 4) 1)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4)))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4))) 1))) (< |c_ULTIMATE.start_main_~i~0#1| c_~N~0) (<= 2 |c_ULTIMATE.start_main_~i~0#1|))) is different from false [2021-11-20 07:42:27,058 WARN L838 $PredicateComparison]: unable to prove that (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) (* |c_ULTIMATE.start_main_~i~0#1| 4))) 1) (exists ((|v_ULTIMATE.start_main_~i~0#1_132| Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_132| 4))) (and (<= |c_ULTIMATE.start_main_~i~0#1| (+ |v_ULTIMATE.start_main_~i~0#1_132| 1)) (< |v_ULTIMATE.start_main_~i~0#1_132| c_~N~0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) .cse1)) 1) (<= 2 |v_ULTIMATE.start_main_~i~0#1_132|) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) 1)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int) (|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (= (select (let ((.cse2 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)) 1)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4)))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4))) 1) (< 0 |v_ULTIMATE.start_main_~i~0#1_143|) (<= |c_ULTIMATE.start_main_~i~0#1| |v_ULTIMATE.start_main_~i~0#1_142|) (<= (+ 2 |v_ULTIMATE.start_main_~i~0#1_142|) |c_ULTIMATE.start_main_~i~0#1|))) (<= 2 |c_ULTIMATE.start_main_~i~0#1|)) is different from false [2021-11-20 07:42:28,338 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~i~0#1_132| Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_132| 4))) (and (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_132| 1)) (< |v_ULTIMATE.start_main_~i~0#1_132| c_~N~0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) .cse1)) 1) (<= 2 |v_ULTIMATE.start_main_~i~0#1_132|) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) 1)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_143| Int)) (or (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (<= (+ 3 |v_ULTIMATE.start_main_~i~0#1_142|) c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_142| 1)) (= (select (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_143| 4)))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4))) 1))) (< 0 |v_ULTIMATE.start_main_~i~0#1_143|)))) is different from false [2021-11-20 07:42:28,931 WARN L838 $PredicateComparison]: unable to prove that (and (= |c_ULTIMATE.start_main_~i~0#1| 0) (exists ((|v_ULTIMATE.start_main_~i~0#1_132| Int)) (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse1 (* |v_ULTIMATE.start_main_~i~0#1_132| 4))) (and (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_132| 1)) (< |v_ULTIMATE.start_main_~i~0#1_132| c_~N~0) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (- 4) .cse1)) 1) (<= 2 |v_ULTIMATE.start_main_~i~0#1_132|) (= (select .cse0 (+ |c_ULTIMATE.start_main_~a~0#1.offset| .cse1)) 1)))) (or (= (select (let ((.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse3 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (store .cse2 .cse3 (+ (select .cse2 .cse3) 1))) (+ (* c_~N~0 4) |c_ULTIMATE.start_main_~a~0#1.offset| (- 8))) 1) (< 3 c_~N~0)) (<= |c_ULTIMATE.start_main_~i~0#1| 0) (forall ((|v_ULTIMATE.start_main_~i~0#1_142| Int)) (or (<= (+ 3 |v_ULTIMATE.start_main_~i~0#1_142|) c_~N~0) (<= c_~N~0 (+ |v_ULTIMATE.start_main_~i~0#1_142| 1)) (= (select (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~a~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 4)))) (store .cse4 .cse5 (+ (select .cse4 .cse5) 1))) (+ |c_ULTIMATE.start_main_~a~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_142| 4))) 1))) (<= 3 c_~N~0)) is different from false [2021-11-20 07:42:29,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:29,169 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2021-11-20 07:42:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:42:29,169 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-11-20 07:42:29,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:29,170 INFO L225 Difference]: With dead ends: 86 [2021-11-20 07:42:29,170 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 07:42:29,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 10 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=291, Invalid=1141, Unknown=14, NotChecked=810, Total=2256 [2021-11-20 07:42:29,172 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 25 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 156 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:29,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 62 Invalid, 355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 174 Invalid, 0 Unknown, 156 Unchecked, 0.1s Time] [2021-11-20 07:42:29,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 07:42:29,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2021-11-20 07:42:29,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.1884057971014492) internal successors, (82), 69 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:29,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-11-20 07:42:29,184 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 34 [2021-11-20 07:42:29,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:29,184 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-11-20 07:42:29,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:29,184 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-11-20 07:42:29,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-20 07:42:29,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:29,185 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:29,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-11-20 07:42:29,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-20 07:42:29,392 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:29,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:29,393 INFO L85 PathProgramCache]: Analyzing trace with hash 880380819, now seen corresponding path program 7 times [2021-11-20 07:42:29,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:29,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195198311] [2021-11-20 07:42:29,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:29,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:29,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:42:29,500 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:29,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195198311] [2021-11-20 07:42:29,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195198311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:42:29,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503647813] [2021-11-20 07:42:29,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:42:29,501 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:29,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:29,502 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:29,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-20 07:42:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:29,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:42:29,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:42:29,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:29,808 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 07:42:29,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503647813] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:42:29,808 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:42:29,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-20 07:42:29,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44564167] [2021-11-20 07:42:29,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:29,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:42:29,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:29,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:42:29,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:42:29,809 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:30,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:30,020 INFO L93 Difference]: Finished difference Result 106 states and 122 transitions. [2021-11-20 07:42:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:42:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-20 07:42:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:30,021 INFO L225 Difference]: With dead ends: 106 [2021-11-20 07:42:30,021 INFO L226 Difference]: Without dead ends: 55 [2021-11-20 07:42:30,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-11-20 07:42:30,023 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 101 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:30,023 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 32 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-20 07:42:30,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-20 07:42:30,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 40. [2021-11-20 07:42:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:30,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2021-11-20 07:42:30,031 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 36 [2021-11-20 07:42:30,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:30,031 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2021-11-20 07:42:30,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:30,032 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2021-11-20 07:42:30,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-20 07:42:30,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:30,033 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:30,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:42:30,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-20 07:42:30,248 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:30,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:30,249 INFO L85 PathProgramCache]: Analyzing trace with hash 975408915, now seen corresponding path program 8 times [2021-11-20 07:42:30,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:30,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667720080] [2021-11-20 07:42:30,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:30,249 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:30,338 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:42:30,339 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:30,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667720080] [2021-11-20 07:42:30,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667720080] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:42:30,339 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014325292] [2021-11-20 07:42:30,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:42:30,339 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:30,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:30,352 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:30,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-20 07:42:30,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:42:30,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:42:30,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-20 07:42:30,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:42:30,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:42:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 07:42:30,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014325292] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:42:30,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:42:30,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 17 [2021-11-20 07:42:30,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901729956] [2021-11-20 07:42:30,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:42:30,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-20 07:42:30,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:42:30,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-20 07:42:30,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-11-20 07:42:30,684 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:30,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:42:30,881 INFO L93 Difference]: Finished difference Result 49 states and 54 transitions. [2021-11-20 07:42:30,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-20 07:42:30,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-20 07:42:30,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:42:30,883 INFO L225 Difference]: With dead ends: 49 [2021-11-20 07:42:30,883 INFO L226 Difference]: Without dead ends: 45 [2021-11-20 07:42:30,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2021-11-20 07:42:30,884 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 82 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 175 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:42:30,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 27 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 175 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:42:30,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-20 07:42:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-11-20 07:42:30,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:30,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 46 transitions. [2021-11-20 07:42:30,892 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 46 transitions. Word has length 39 [2021-11-20 07:42:30,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:42:30,893 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 46 transitions. [2021-11-20 07:42:30,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.588235294117647) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:42:30,893 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 46 transitions. [2021-11-20 07:42:30,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:42:30,894 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:42:30,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:42:30,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-20 07:42:31,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-20 07:42:31,095 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:42:31,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:42:31,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1118330549, now seen corresponding path program 9 times [2021-11-20 07:42:31,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:42:31,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393930076] [2021-11-20 07:42:31,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:42:31,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:42:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:42:33,632 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:33,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 07:42:33,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393930076] [2021-11-20 07:42:33,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393930076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 07:42:33,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790155990] [2021-11-20 07:42:33,632 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:42:33,632 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 07:42:33,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:42:33,634 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 07:42:33,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2db8b78a-d5a4-4adf-bf0f-69ab2e448637/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-20 07:42:33,702 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-20 07:42:33,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:42:33,703 WARN L261 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-20 07:42:33,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:42:33,727 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 11 treesize of output 7 [2021-11-20 07:42:33,731 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 10 treesize of output 8 [2021-11-20 07:42:33,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:33,752 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 23 treesize of output 22 [2021-11-20 07:42:33,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:33,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 37 [2021-11-20 07:42:34,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:34,050 INFO L354 Elim1Store]: treesize reduction 54, result has 23.9 percent of original size [2021-11-20 07:42:34,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 39 treesize of output 44 [2021-11-20 07:42:34,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:34,265 INFO L354 Elim1Store]: treesize reduction 116, result has 19.4 percent of original size [2021-11-20 07:42:34,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 58 treesize of output 66 [2021-11-20 07:42:34,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:42:34,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:34,991 INFO L354 Elim1Store]: treesize reduction 144, result has 17.7 percent of original size [2021-11-20 07:42:34,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 95 treesize of output 88 [2021-11-20 07:42:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:35,742 INFO L354 Elim1Store]: treesize reduction 124, result has 22.0 percent of original size [2021-11-20 07:42:35,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 86 treesize of output 94 [2021-11-20 07:42:36,800 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:36,888 INFO L354 Elim1Store]: treesize reduction 232, result has 22.4 percent of original size [2021-11-20 07:42:36,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 112 treesize of output 135 [2021-11-20 07:42:38,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:38,629 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:38,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:38,631 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:38,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:38,683 INFO L354 Elim1Store]: treesize reduction 234, result has 15.8 percent of original size [2021-11-20 07:42:38,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 133 treesize of output 145 [2021-11-20 07:42:41,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:41,163 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:42:41,171 INFO L354 Elim1Store]: treesize reduction 79, result has 1.3 percent of original size [2021-11-20 07:42:41,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 95 treesize of output 91 [2021-11-20 07:42:41,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:41,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:41,506 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 07:42:41,509 INFO L354 Elim1Store]: treesize reduction 75, result has 1.3 percent of original size [2021-11-20 07:42:41,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 2 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 99 treesize of output 89 [2021-11-20 07:42:41,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:41,831 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:41,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:41,840 INFO L354 Elim1Store]: treesize reduction 104, result has 1.0 percent of original size [2021-11-20 07:42:41,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 7 case distinctions, treesize of input 95 treesize of output 98 [2021-11-20 07:42:42,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:42,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:42,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:42,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:42,206 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 07:42:42,286 INFO L354 Elim1Store]: treesize reduction 390, result has 12.4 percent of original size [2021-11-20 07:42:42,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 102 treesize of output 108 [2021-11-20 07:42:43,090 INFO L354 Elim1Store]: treesize reduction 250, result has 2.7 percent of original size [2021-11-20 07:42:43,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 108 treesize of output 66 [2021-11-20 07:42:43,174 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:42:43,174 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:49:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 50 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:49:00,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790155990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:49:00,357 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 07:49:00,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 36, 36] total 97 [2021-11-20 07:49:00,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241908237] [2021-11-20 07:49:00,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 07:49:00,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-20 07:49:00,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 07:49:00,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-20 07:49:00,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1324, Invalid=7857, Unknown=131, NotChecked=0, Total=9312 [2021-11-20 07:49:00,361 INFO L87 Difference]: Start difference. First operand 42 states and 46 transitions. Second operand has 97 states, 97 states have (on average 1.1443298969072164) internal successors, (111), 97 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 07:49:37,050 WARN L227 SmtUtils]: Spent 26.68s on a formula simplification that was a NOOP. DAG size: 166 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:50:12,669 WARN L227 SmtUtils]: Spent 12.44s on a formula simplification that was a NOOP. DAG size: 160 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:50:40,199 WARN L227 SmtUtils]: Spent 10.42s on a formula simplification that was a NOOP. DAG size: 157 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 07:51:04,268 WARN L227 SmtUtils]: Spent 12.45s on a formula simplification that was a NOOP. DAG size: 132 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)