./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-tiling/mbpr2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-tiling/mbpr2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa --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 a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 18:00:54,667 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 18:00:54,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 18:00:54,700 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 18:00:54,701 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 18:00:54,702 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 18:00:54,704 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 18:00:54,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 18:00:54,708 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 18:00:54,709 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 18:00:54,710 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 18:00:54,711 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 18:00:54,711 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 18:00:54,712 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 18:00:54,713 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 18:00:54,715 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 18:00:54,715 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 18:00:54,716 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 18:00:54,718 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 18:00:54,720 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 18:00:54,721 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 18:00:54,722 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 18:00:54,723 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 18:00:54,724 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 18:00:54,727 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 18:00:54,727 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 18:00:54,728 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 18:00:54,728 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 18:00:54,729 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 18:00:54,730 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 18:00:54,730 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 18:00:54,731 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 18:00:54,731 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 18:00:54,732 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 18:00:54,733 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 18:00:54,733 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 18:00:54,734 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 18:00:54,734 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 18:00:54,734 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 18:00:54,735 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 18:00:54,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 18:00:54,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 18:00:54,753 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 18:00:54,754 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 18:00:54,754 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 18:00:54,754 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 18:00:54,755 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 18:00:54,755 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 18:00:54,755 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 18:00:54,755 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 18:00:54,756 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 18:00:54,756 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 18:00:54,756 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 18:00:54,756 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 18:00:54,756 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 18:00:54,756 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 18:00:54,756 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 18:00:54,757 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 18:00:54,757 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 18:00:54,757 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 18:00:54,757 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 18:00:54,757 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 18:00:54,757 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 18:00:54,758 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 18:00:54,758 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 18:00:54,758 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 18:00:54,758 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:00:54,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 18:00:54,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 18:00:54,758 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 18:00:54,759 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 18:00:54,759 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 18:00:54,759 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 18:00:54,759 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 18:00:54,759 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 18:00:54,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 18:00:54,759 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_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98ea70d5d9f752732070144a56514c68e9571f139726211e2f0ade721d6c5f3 [2021-12-06 18:00:54,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 18:00:54,938 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 18:00:54,939 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 18:00:54,940 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 18:00:54,941 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 18:00:54,942 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/array-tiling/mbpr2.c [2021-12-06 18:00:54,983 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/data/144150ae9/71797430d1574a4994bc5f6354458aa1/FLAG64ed8f661 [2021-12-06 18:00:55,370 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 18:00:55,370 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/sv-benchmarks/c/array-tiling/mbpr2.c [2021-12-06 18:00:55,375 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/data/144150ae9/71797430d1574a4994bc5f6354458aa1/FLAG64ed8f661 [2021-12-06 18:00:55,384 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/data/144150ae9/71797430d1574a4994bc5f6354458aa1 [2021-12-06 18:00:55,386 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 18:00:55,387 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 18:00:55,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 18:00:55,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 18:00:55,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 18:00:55,391 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,391 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eef15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55, skipping insertion in model container [2021-12-06 18:00:55,391 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,396 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 18:00:55,407 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 18:00:55,524 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_f69e1027-be23-41da-8578-f64633dcd6c7/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2021-12-06 18:00:55,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:00:55,548 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 18:00:55,558 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_f69e1027-be23-41da-8578-f64633dcd6c7/sv-benchmarks/c/array-tiling/mbpr2.c[396,409] [2021-12-06 18:00:55,568 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 18:00:55,581 INFO L208 MainTranslator]: Completed translation [2021-12-06 18:00:55,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55 WrapperNode [2021-12-06 18:00:55,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 18:00:55,583 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 18:00:55,583 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 18:00:55,583 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 18:00:55,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,594 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,609 INFO L137 Inliner]: procedures = 15, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 83 [2021-12-06 18:00:55,609 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 18:00:55,610 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 18:00:55,610 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 18:00:55,610 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 18:00:55,616 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,616 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,622 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,625 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,626 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,628 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 18:00:55,629 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 18:00:55,629 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 18:00:55,629 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 18:00:55,630 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (1/1) ... [2021-12-06 18:00:55,636 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 18:00:55,643 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:55,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 18:00:55,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 18:00:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 18:00:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 18:00:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 18:00:55,689 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 18:00:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 18:00:55,690 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 18:00:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 18:00:55,690 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 18:00:55,740 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 18:00:55,741 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 18:00:55,845 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 18:00:55,850 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 18:00:55,850 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-06 18:00:55,851 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:00:55 BoogieIcfgContainer [2021-12-06 18:00:55,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 18:00:55,853 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 18:00:55,853 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 18:00:55,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 18:00:55,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 06:00:55" (1/3) ... [2021-12-06 18:00:55,856 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3999f54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:00:55, skipping insertion in model container [2021-12-06 18:00:55,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 06:00:55" (2/3) ... [2021-12-06 18:00:55,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3999f54c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 06:00:55, skipping insertion in model container [2021-12-06 18:00:55,857 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 06:00:55" (3/3) ... [2021-12-06 18:00:55,858 INFO L111 eAbstractionObserver]: Analyzing ICFG mbpr2.c [2021-12-06 18:00:55,862 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 18:00:55,862 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-06 18:00:55,899 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 18:00:55,904 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 [2021-12-06 18:00:55,904 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-06 18:00:55,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:55,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:00:55,921 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:55,922 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:55,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:55,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:55,928 INFO L85 PathProgramCache]: Analyzing trace with hash -669443655, now seen corresponding path program 1 times [2021-12-06 18:00:55,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:55,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736309157] [2021-12-06 18:00:55,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:55,938 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:56,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:56,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736309157] [2021-12-06 18:00:56,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736309157] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:00:56,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:00:56,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 18:00:56,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113859446] [2021-12-06 18:00:56,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:00:56,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 18:00:56,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:56,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 18:00:56,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 18:00:56,088 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 28 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:56,109 INFO L93 Difference]: Finished difference Result 53 states and 74 transitions. [2021-12-06 18:00:56,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 18:00:56,111 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-06 18:00:56,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:56,119 INFO L225 Difference]: With dead ends: 53 [2021-12-06 18:00:56,119 INFO L226 Difference]: Without dead ends: 24 [2021-12-06 18:00:56,122 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 [2021-12-06 18:00:56,126 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:56,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:00:56,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-06 18:00:56,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-06 18:00:56,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-06 18:00:56,153 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 15 [2021-12-06 18:00:56,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:56,154 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-06 18:00:56,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,154 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-06 18:00:56,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:00:56,155 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:56,155 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:56,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-06 18:00:56,155 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:56,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:56,156 INFO L85 PathProgramCache]: Analyzing trace with hash -893920799, now seen corresponding path program 1 times [2021-12-06 18:00:56,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:56,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499170879] [2021-12-06 18:00:56,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:56,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:56,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:56,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:56,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499170879] [2021-12-06 18:00:56,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499170879] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:00:56,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:00:56,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 18:00:56,223 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798285205] [2021-12-06 18:00:56,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:00:56,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 18:00:56,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:56,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 18:00:56,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 18:00:56,225 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:56,251 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2021-12-06 18:00:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:00:56,251 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-06 18:00:56,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:56,252 INFO L225 Difference]: With dead ends: 33 [2021-12-06 18:00:56,252 INFO L226 Difference]: Without dead ends: 31 [2021-12-06 18:00:56,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:00:56,254 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 9 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:56,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 77 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:00:56,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-12-06 18:00:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2021-12-06 18:00:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.24) internal successors, (31), 25 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) [2021-12-06 18:00:56,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-06 18:00:56,259 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 15 [2021-12-06 18:00:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:56,259 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-06 18:00:56,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-06 18:00:56,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-06 18:00:56,260 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:56,260 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:56,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-06 18:00:56,260 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:56,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:56,261 INFO L85 PathProgramCache]: Analyzing trace with hash -893861217, now seen corresponding path program 1 times [2021-12-06 18:00:56,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:56,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306996369] [2021-12-06 18:00:56,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:56,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:56,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:56,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:56,375 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306996369] [2021-12-06 18:00:56,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306996369] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:00:56,375 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:00:56,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 18:00:56,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533006235] [2021-12-06 18:00:56,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:00:56,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 18:00:56,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:56,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 18:00:56,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:00:56,377 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:56,427 INFO L93 Difference]: Finished difference Result 50 states and 62 transitions. [2021-12-06 18:00:56,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-06 18:00:56,428 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 15 [2021-12-06 18:00:56,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:56,429 INFO L225 Difference]: With dead ends: 50 [2021-12-06 18:00:56,429 INFO L226 Difference]: Without dead ends: 34 [2021-12-06 18:00:56,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-12-06 18:00:56,430 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 56 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:56,431 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 22 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:00:56,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-12-06 18:00:56,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-12-06 18:00:56,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2021-12-06 18:00:56,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 15 [2021-12-06 18:00:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:56,435 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2021-12-06 18:00:56,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,436 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2021-12-06 18:00:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 18:00:56,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:56,436 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, 1, 1, 1] [2021-12-06 18:00:56,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-06 18:00:56,437 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:56,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:56,437 INFO L85 PathProgramCache]: Analyzing trace with hash -815951211, now seen corresponding path program 1 times [2021-12-06 18:00:56,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:56,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870526410] [2021-12-06 18:00:56,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:56,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:56,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:56,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:00:56,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:56,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870526410] [2021-12-06 18:00:56,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870526410] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 18:00:56,492 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 18:00:56,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 18:00:56,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15138733] [2021-12-06 18:00:56,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 18:00:56,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 18:00:56,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:56,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 18:00:56,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:00:56,493 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:56,502 INFO L93 Difference]: Finished difference Result 43 states and 51 transitions. [2021-12-06 18:00:56,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 18:00:56,503 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 18:00:56,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:56,504 INFO L225 Difference]: With dead ends: 43 [2021-12-06 18:00:56,504 INFO L226 Difference]: Without dead ends: 28 [2021-12-06 18:00:56,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 18:00:56,505 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:56,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 18:00:56,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-06 18:00:56,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-12-06 18:00:56,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-12-06 18:00:56,510 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 23 [2021-12-06 18:00:56,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:56,510 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-12-06 18:00:56,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:56,510 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-12-06 18:00:56,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-06 18:00:56,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:56,511 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, 1, 1, 1] [2021-12-06 18:00:56,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-06 18:00:56,511 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:56,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:56,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1208978221, now seen corresponding path program 1 times [2021-12-06 18:00:56,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:56,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725447277] [2021-12-06 18:00:56,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:56,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:56,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:56,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:56,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:56,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725447277] [2021-12-06 18:00:56,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725447277] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:56,736 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752145915] [2021-12-06 18:00:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:56,736 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:56,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:56,737 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:56,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 18:00:56,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:56,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjunts are in the unsatisfiable core [2021-12-06 18:00:56,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:56,883 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 16 treesize of output 12 [2021-12-06 18:00:56,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:56,917 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 21 treesize of output 20 [2021-12-06 18:00:56,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:56,993 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 29 treesize of output 28 [2021-12-06 18:00:57,018 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 0 case distinctions, treesize of input 26 treesize of output 14 [2021-12-06 18:00:57,074 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 [2021-12-06 18:00:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:57,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:57,237 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 13 [2021-12-06 18:00:57,240 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 26 [2021-12-06 18:00:57,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:00:57,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752145915] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:57,278 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:57,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 7] total 18 [2021-12-06 18:00:57,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378107848] [2021-12-06 18:00:57,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:57,278 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-06 18:00:57,278 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:57,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-06 18:00:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-12-06 18:00:57,279 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:57,423 INFO L93 Difference]: Finished difference Result 73 states and 84 transitions. [2021-12-06 18:00:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-06 18:00:57,424 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-12-06 18:00:57,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:57,424 INFO L225 Difference]: With dead ends: 73 [2021-12-06 18:00:57,424 INFO L226 Difference]: Without dead ends: 52 [2021-12-06 18:00:57,425 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-12-06 18:00:57,426 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 153 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:57,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 76 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:00:57,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-06 18:00:57,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 30. [2021-12-06 18:00:57,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:57,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2021-12-06 18:00:57,430 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 23 [2021-12-06 18:00:57,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:57,431 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2021-12-06 18:00:57,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:57,431 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2021-12-06 18:00:57,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-06 18:00:57,431 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:57,431 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:57,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 18:00:57,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:57,634 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:57,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1368311994, now seen corresponding path program 1 times [2021-12-06 18:00:57,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:57,636 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979125990] [2021-12-06 18:00:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:57,637 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:57,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:00:57,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979125990] [2021-12-06 18:00:57,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979125990] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681082308] [2021-12-06 18:00:57,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:57,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:57,837 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:57,837 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:57,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 18:00:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:57,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjunts are in the unsatisfiable core [2021-12-06 18:00:57,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:57,897 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 16 treesize of output 12 [2021-12-06 18:00:57,912 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-12-06 18:00:57,913 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 21 treesize of output 20 [2021-12-06 18:00:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:00:57,964 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:58,012 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 17 treesize of output 15 [2021-12-06 18:00:58,014 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 30 treesize of output 26 [2021-12-06 18:00:58,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:00:58,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681082308] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:58,026 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:58,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 11 [2021-12-06 18:00:58,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303241151] [2021-12-06 18:00:58,026 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:58,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-06 18:00:58,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:58,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-06 18:00:58,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-12-06 18:00:58,027 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:58,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:58,177 INFO L93 Difference]: Finished difference Result 56 states and 61 transitions. [2021-12-06 18:00:58,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-06 18:00:58,177 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-12-06 18:00:58,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:58,178 INFO L225 Difference]: With dead ends: 56 [2021-12-06 18:00:58,178 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 18:00:58,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 53 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:00:58,179 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 56 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:58,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 91 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:00:58,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 18:00:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2021-12-06 18:00:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 35 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:58,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2021-12-06 18:00:58,184 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 29 [2021-12-06 18:00:58,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:58,184 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2021-12-06 18:00:58,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:58,184 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2021-12-06 18:00:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-06 18:00:58,185 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:58,185 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, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:58,218 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 18:00:58,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:58,386 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:58,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:58,387 INFO L85 PathProgramCache]: Analyzing trace with hash 21305209, now seen corresponding path program 2 times [2021-12-06 18:00:58,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:58,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753541795] [2021-12-06 18:00:58,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:58,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:58,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:00:58,670 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:58,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753541795] [2021-12-06 18:00:58,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753541795] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:58,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412618004] [2021-12-06 18:00:58,671 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:00:58,671 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:58,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:58,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:58,672 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 18:00:58,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:00:58,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:00:58,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-06 18:00:58,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:58,935 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:00:58,935 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:00:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 18:00:59,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412618004] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:00:59,042 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:00:59,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 25 [2021-12-06 18:00:59,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498994182] [2021-12-06 18:00:59,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:00:59,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:00:59,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:00:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:00:59,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2021-12-06 18:00:59,044 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:59,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:00:59,223 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-12-06 18:00:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:00:59,223 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-12-06 18:00:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:00:59,224 INFO L225 Difference]: With dead ends: 97 [2021-12-06 18:00:59,224 INFO L226 Difference]: Without dead ends: 54 [2021-12-06 18:00:59,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:00:59,226 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 335 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:00:59,226 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 81 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:00:59,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-06 18:00:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2021-12-06 18:00:59,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:59,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2021-12-06 18:00:59,233 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2021-12-06 18:00:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:00:59,234 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2021-12-06 18:00:59,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.72) internal successors, (93), 25 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:00:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2021-12-06 18:00:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:00:59,235 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:00:59,235 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:00:59,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 18:00:59,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:59,437 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:00:59,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:00:59,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1279882925, now seen corresponding path program 3 times [2021-12-06 18:00:59,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:00:59,439 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433980307] [2021-12-06 18:00:59,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:00:59,439 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:00:59,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:00:59,677 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-06 18:00:59,678 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:00:59,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433980307] [2021-12-06 18:00:59,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433980307] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:00:59,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142733209] [2021-12-06 18:00:59,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:00:59,678 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:00:59,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:00:59,679 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:00:59,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 18:00:59,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-06 18:00:59,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:00:59,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-06 18:00:59,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:00:59,812 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 16 treesize of output 12 [2021-12-06 18:00:59,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:59,838 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 29 treesize of output 28 [2021-12-06 18:00:59,872 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:59,873 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 26 treesize of output 25 [2021-12-06 18:00:59,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:00:59,885 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 26 treesize of output 25 [2021-12-06 18:00:59,967 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 [2021-12-06 18:00:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-06 18:00:59,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:02,098 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_52| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_52| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_129 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_52| 8) (- 4)) v_ArrVal_129) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2021-12-06 18:01:02,696 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 33 treesize of output 31 [2021-12-06 18:01:02,700 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 856 treesize of output 840 [2021-12-06 18:01:03,693 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 1 not checked. [2021-12-06 18:01:03,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142733209] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:03,694 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:03,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 11] total 25 [2021-12-06 18:01:03,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316915679] [2021-12-06 18:01:03,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:03,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-06 18:01:03,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:03,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-06 18:01:03,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=443, Unknown=2, NotChecked=44, Total=600 [2021-12-06 18:01:03,696 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:05,766 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 4))))) (and (<= .cse0 0) (= |c_ULTIMATE.start_main_~i~0#1| 1) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (= (* 8 |c_ULTIMATE.start_main_~i~0#1|) 8) (forall ((|v_ULTIMATE.start_main_~i~0#1_52| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_52| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_129 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_52| 8) (- 4)) v_ArrVal_129) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (= .cse0 0) (<= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|))) is different from false [2021-12-06 18:01:07,799 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)))) (and (= .cse0 0) (<= .cse0 0) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (not (= (* 8 |c_ULTIMATE.start_main_~i~0#1|) 8)) (forall ((|v_ULTIMATE.start_main_~i~0#1_52| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_52| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_129 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_52| 8) (- 4)) v_ArrVal_129) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 4)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (<= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|))) is different from false [2021-12-06 18:01:07,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:07,911 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2021-12-06 18:01:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-06 18:01:07,911 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 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 43 [2021-12-06 18:01:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:07,912 INFO L225 Difference]: With dead ends: 65 [2021-12-06 18:01:07,912 INFO L226 Difference]: Without dead ends: 55 [2021-12-06 18:01:07,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 3 IntricatePredicates, 1 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=238, Invalid=826, Unknown=4, NotChecked=192, Total=1260 [2021-12-06 18:01:07,913 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 77 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 63 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:07,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 122 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 206 Invalid, 0 Unknown, 63 Unchecked, 0.1s Time] [2021-12-06 18:01:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-06 18:01:07,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2021-12-06 18:01:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-12-06 18:01:07,917 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 43 [2021-12-06 18:01:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:07,917 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-12-06 18:01:07,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.88) internal successors, (97), 25 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-12-06 18:01:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-06 18:01:07,918 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:07,919 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:07,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 18:01:08,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:08,120 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:08,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash 886855915, now seen corresponding path program 4 times [2021-12-06 18:01:08,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:08,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660885309] [2021-12-06 18:01:08,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:08,122 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:01:08,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:08,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660885309] [2021-12-06 18:01:08,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660885309] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:08,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454670769] [2021-12-06 18:01:08,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:01:08,360 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:08,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:08,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:08,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 18:01:08,395 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:01:08,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:08,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-06 18:01:08,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:08,462 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 16 treesize of output 12 [2021-12-06 18:01:08,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:08,481 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 [2021-12-06 18:01:08,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:08,518 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 26 treesize of output 25 [2021-12-06 18:01:08,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:08,531 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 26 treesize of output 25 [2021-12-06 18:01:08,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:08,561 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 29 treesize of output 28 [2021-12-06 18:01:08,570 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 0 case distinctions, treesize of input 32 treesize of output 16 [2021-12-06 18:01:08,669 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 [2021-12-06 18:01:08,682 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:08,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:10,892 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 17 treesize of output 15 [2021-12-06 18:01:10,894 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 34 treesize of output 30 [2021-12-06 18:01:10,948 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:01:10,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454670769] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:10,948 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:10,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 11] total 27 [2021-12-06 18:01:10,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154888978] [2021-12-06 18:01:10,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:10,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-12-06 18:01:10,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:10,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-12-06 18:01:10,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2021-12-06 18:01:10,949 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 27 states, 27 states have (on average 4.296296296296297) internal successors, (116), 27 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:11,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:11,184 INFO L93 Difference]: Finished difference Result 71 states and 76 transitions. [2021-12-06 18:01:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 18:01:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 4.296296296296297) internal successors, (116), 27 states have internal predecessors, (116), 0 states have call successors, (0), 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 43 [2021-12-06 18:01:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:11,185 INFO L225 Difference]: With dead ends: 71 [2021-12-06 18:01:11,185 INFO L226 Difference]: Without dead ends: 61 [2021-12-06 18:01:11,185 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 70 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:01:11,186 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 169 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 331 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 331 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:11,186 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 142 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 331 Invalid, 0 Unknown, 33 Unchecked, 0.1s Time] [2021-12-06 18:01:11,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-06 18:01:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2021-12-06 18:01:11,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 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) [2021-12-06 18:01:11,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-12-06 18:01:11,190 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 43 [2021-12-06 18:01:11,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:11,190 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-12-06 18:01:11,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 4.296296296296297) internal successors, (116), 27 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:11,191 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-12-06 18:01:11,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-12-06 18:01:11,191 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:11,191 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:11,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-06 18:01:11,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:11,393 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:11,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:11,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1854428834, now seen corresponding path program 5 times [2021-12-06 18:01:11,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:11,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170544056] [2021-12-06 18:01:11,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:11,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:11,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:11,644 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:11,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:11,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170544056] [2021-12-06 18:01:11,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170544056] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:11,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975607453] [2021-12-06 18:01:11,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:01:11,644 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:11,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:11,645 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:11,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 18:01:11,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-12-06 18:01:11,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:11,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 18:01:11,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:11,765 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 16 treesize of output 12 [2021-12-06 18:01:11,791 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-06 18:01:11,791 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 23 treesize of output 22 [2021-12-06 18:01:11,885 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:01:11,885 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:11,970 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 17 treesize of output 15 [2021-12-06 18:01:11,971 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 30 treesize of output 26 [2021-12-06 18:01:11,987 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:01:11,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975607453] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:11,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:11,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11, 11] total 29 [2021-12-06 18:01:11,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971108527] [2021-12-06 18:01:11,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:11,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-12-06 18:01:11,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:11,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-12-06 18:01:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2021-12-06 18:01:11,989 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:12,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:12,812 INFO L93 Difference]: Finished difference Result 174 states and 191 transitions. [2021-12-06 18:01:12,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-12-06 18:01:12,812 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 0 states have call successors, (0), 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 49 [2021-12-06 18:01:12,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:12,813 INFO L225 Difference]: With dead ends: 174 [2021-12-06 18:01:12,814 INFO L226 Difference]: Without dead ends: 145 [2021-12-06 18:01:12,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 83 SyntacticMatches, 5 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=800, Invalid=4312, Unknown=0, NotChecked=0, Total=5112 [2021-12-06 18:01:12,816 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 356 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:12,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [356 Valid, 208 Invalid, 867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-06 18:01:12,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-12-06 18:01:12,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 70. [2021-12-06 18:01:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 69 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:12,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 75 transitions. [2021-12-06 18:01:12,822 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 75 transitions. Word has length 49 [2021-12-06 18:01:12,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:12,822 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 75 transitions. [2021-12-06 18:01:12,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.9310344827586206) internal successors, (114), 29 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:12,823 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 75 transitions. [2021-12-06 18:01:12,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-06 18:01:12,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:12,823 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:12,827 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 18:01:13,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 18:01:13,025 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:13,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:13,026 INFO L85 PathProgramCache]: Analyzing trace with hash -2084333679, now seen corresponding path program 6 times [2021-12-06 18:01:13,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:13,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298513137] [2021-12-06 18:01:13,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:13,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:13,255 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:01:13,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298513137] [2021-12-06 18:01:13,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298513137] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287584263] [2021-12-06 18:01:13,256 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:01:13,256 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:13,256 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:13,257 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:13,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 18:01:13,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-12-06 18:01:13,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:13,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:01:13,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:13,655 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:01:13,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:13,802 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 52 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:01:13,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287584263] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:13,802 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:13,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 33 [2021-12-06 18:01:13,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641601469] [2021-12-06 18:01:13,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:13,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-06 18:01:13,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:13,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-06 18:01:13,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2021-12-06 18:01:13,804 INFO L87 Difference]: Start difference. First operand 70 states and 75 transitions. Second operand has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 33 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:14,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:14,016 INFO L93 Difference]: Finished difference Result 117 states and 125 transitions. [2021-12-06 18:01:14,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-06 18:01:14,017 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 33 states have internal predecessors, (140), 0 states have call successors, (0), 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 55 [2021-12-06 18:01:14,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:14,017 INFO L225 Difference]: With dead ends: 117 [2021-12-06 18:01:14,017 INFO L226 Difference]: Without dead ends: 70 [2021-12-06 18:01:14,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=418, Invalid=1142, Unknown=0, NotChecked=0, Total=1560 [2021-12-06 18:01:14,019 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 376 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 376 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:14,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [376 Valid, 167 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:01:14,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-12-06 18:01:14,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2021-12-06 18:01:14,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:14,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-12-06 18:01:14,024 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 55 [2021-12-06 18:01:14,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:14,024 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-12-06 18:01:14,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 4.242424242424242) internal successors, (140), 33 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:14,024 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-12-06 18:01:14,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:01:14,025 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:14,025 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:14,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 18:01:14,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:14,227 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:14,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:14,228 INFO L85 PathProgramCache]: Analyzing trace with hash 419308485, now seen corresponding path program 7 times [2021-12-06 18:01:14,228 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:14,228 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101068301] [2021-12-06 18:01:14,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:14,229 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:14,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:14,767 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:01:14,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101068301] [2021-12-06 18:01:14,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101068301] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:14,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008844695] [2021-12-06 18:01:14,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:01:14,768 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:14,768 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:14,768 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:14,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 18:01:14,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:14,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-06 18:01:14,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:14,878 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 16 treesize of output 12 [2021-12-06 18:01:14,902 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:01:14,902 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 29 treesize of output 28 [2021-12-06 18:01:14,931 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:01:14,932 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 26 treesize of output 25 [2021-12-06 18:01:14,942 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:01:14,942 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 26 treesize of output 25 [2021-12-06 18:01:15,075 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 19 treesize of output 7 [2021-12-06 18:01:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-12-06 18:01:15,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:17,244 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_111| Int)) (or (forall ((v_ArrVal_314 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 8) (- 4)) v_ArrVal_314) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:01:21,258 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 33 treesize of output 31 [2021-12-06 18:01:21,261 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 196 treesize of output 192 [2021-12-06 18:01:21,370 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 26 proven. 37 refuted. 0 times theorem prover too weak. 17 trivial. 2 not checked. [2021-12-06 18:01:21,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008844695] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:21,370 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:21,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12, 14] total 40 [2021-12-06 18:01:21,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410175668] [2021-12-06 18:01:21,370 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:21,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-06 18:01:21,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:21,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-06 18:01:21,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=1255, Unknown=8, NotChecked=74, Total=1560 [2021-12-06 18:01:21,372 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:23,693 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|)) (.cse1 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (<= 3 (div c_~CELLCOUNT~0 2)) (forall ((|v_ULTIMATE.start_main_~i~0#1_111| Int)) (or (forall ((v_ArrVal_314 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 8) (- 4)) v_ArrVal_314) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= |c_ULTIMATE.start_main_~i~0#1| 2) .cse0 (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 2 |c_ULTIMATE.start_main_~i~0#1|) (= (select .cse1 12) 0) (or (and .cse0 (= (select .cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 4))) 0)) (not (= 16 (+ (* 8 |c_ULTIMATE.start_main_~i~0#1|) |c_ULTIMATE.start_main_~#volArray~0#1.offset|)))))) is different from false [2021-12-06 18:01:25,760 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (forall ((|v_ULTIMATE.start_main_~i~0#1_111| Int)) (or (forall ((v_ArrVal_314 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_111| 8) (- 4)) v_ArrVal_314) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_111| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) 0) (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (let ((.cse3 (div c_~CELLCOUNT~0 2)) (.cse4 (* 8 |c_ULTIMATE.start_main_~i~0#1|))) (let ((.cse1 (+ .cse4 |c_ULTIMATE.start_main_~#volArray~0#1.offset|)) (.cse2 (* 8 .cse3))) (or (and (not (= 16 .cse1)) (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (= (select .cse0 12) 0)) (and (<= .cse1 (+ 7 .cse2)) (< c_~CELLCOUNT~0 0) (not (= c_~CELLCOUNT~0 (* 2 .cse3)))) (<= (+ .cse4 |c_ULTIMATE.start_main_~#volArray~0#1.offset| 1) .cse2)))) (<= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|))) is different from false [2021-12-06 18:01:26,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:26,072 INFO L93 Difference]: Finished difference Result 153 states and 164 transitions. [2021-12-06 18:01:26,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-12-06 18:01:26,072 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 18:01:26,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:26,073 INFO L225 Difference]: With dead ends: 153 [2021-12-06 18:01:26,073 INFO L226 Difference]: Without dead ends: 143 [2021-12-06 18:01:26,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=437, Invalid=2645, Unknown=10, NotChecked=330, Total=3422 [2021-12-06 18:01:26,075 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 235 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 136 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:26,075 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 468 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 801 Invalid, 0 Unknown, 136 Unchecked, 0.3s Time] [2021-12-06 18:01:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-12-06 18:01:26,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 93. [2021-12-06 18:01:26,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.076086956521739) internal successors, (99), 92 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:26,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 99 transitions. [2021-12-06 18:01:26,082 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 99 transitions. Word has length 63 [2021-12-06 18:01:26,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:26,082 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 99 transitions. [2021-12-06 18:01:26,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.725) internal successors, (149), 40 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:26,082 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 99 transitions. [2021-12-06 18:01:26,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-12-06 18:01:26,083 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:26,083 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:26,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 18:01:26,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:26,285 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:26,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:26,286 INFO L85 PathProgramCache]: Analyzing trace with hash 26281475, now seen corresponding path program 8 times [2021-12-06 18:01:26,286 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:26,286 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879476392] [2021-12-06 18:01:26,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:26,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:26,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:27,002 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:27,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:27,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879476392] [2021-12-06 18:01:27,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879476392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:27,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377441813] [2021-12-06 18:01:27,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:01:27,003 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:27,003 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:27,004 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:27,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 18:01:27,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:01:27,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:27,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 56 conjunts are in the unsatisfiable core [2021-12-06 18:01:27,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:27,194 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 16 treesize of output 12 [2021-12-06 18:01:27,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:27,223 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 [2021-12-06 18:01:27,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:27,286 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 26 treesize of output 25 [2021-12-06 18:01:27,297 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:27,297 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 26 treesize of output 25 [2021-12-06 18:01:27,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:27,338 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 26 treesize of output 25 [2021-12-06 18:01:27,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:27,350 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 26 treesize of output 25 [2021-12-06 18:01:27,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:27,390 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 29 treesize of output 28 [2021-12-06 18:01:27,424 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-06 18:01:27,426 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-06 18:01:27,426 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 38 treesize of output 25 [2021-12-06 18:01:27,812 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 8 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:27,813 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:32,016 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 35 treesize of output 31 [2021-12-06 18:01:32,018 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 67 treesize of output 59 [2021-12-06 18:01:32,225 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-06 18:01:32,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377441813] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:32,225 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:32,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 18] total 50 [2021-12-06 18:01:32,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278859092] [2021-12-06 18:01:32,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:32,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-06 18:01:32,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-06 18:01:32,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=2233, Unknown=1, NotChecked=0, Total=2450 [2021-12-06 18:01:32,228 INFO L87 Difference]: Start difference. First operand 93 states and 99 transitions. Second operand has 50 states, 50 states have (on average 3.6) internal successors, (180), 50 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:35,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:35,853 INFO L93 Difference]: Finished difference Result 229 states and 251 transitions. [2021-12-06 18:01:35,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-12-06 18:01:35,854 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.6) internal successors, (180), 50 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-12-06 18:01:35,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:35,855 INFO L225 Difference]: With dead ends: 229 [2021-12-06 18:01:35,855 INFO L226 Difference]: Without dead ends: 219 [2021-12-06 18:01:35,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 104 SyntacticMatches, 10 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5892 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=2062, Invalid=16843, Unknown=1, NotChecked=0, Total=18906 [2021-12-06 18:01:35,860 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 812 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 1562 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 812 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 2185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 1562 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 267 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:35,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [812 Valid, 506 Invalid, 2185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 1562 Invalid, 0 Unknown, 267 Unchecked, 0.7s Time] [2021-12-06 18:01:35,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-12-06 18:01:35,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 105. [2021-12-06 18:01:35,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0769230769230769) internal successors, (112), 104 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:35,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 112 transitions. [2021-12-06 18:01:35,867 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 112 transitions. Word has length 63 [2021-12-06 18:01:35,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:35,868 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 112 transitions. [2021-12-06 18:01:35,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.6) internal successors, (180), 50 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:35,868 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 112 transitions. [2021-12-06 18:01:35,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-06 18:01:35,869 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:35,869 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:35,888 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 18:01:36,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:36,071 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:36,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:36,072 INFO L85 PathProgramCache]: Analyzing trace with hash -903520087, now seen corresponding path program 9 times [2021-12-06 18:01:36,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:36,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907634366] [2021-12-06 18:01:36,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:36,073 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:36,407 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 83 proven. 46 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-06 18:01:36,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:36,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907634366] [2021-12-06 18:01:36,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907634366] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:36,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329621511] [2021-12-06 18:01:36,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 18:01:36,407 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:36,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:36,408 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:36,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 18:01:36,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-12-06 18:01:36,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:36,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 18 conjunts are in the unsatisfiable core [2021-12-06 18:01:36,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:37,172 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 123 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:01:37,173 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:37,394 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 114 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-06 18:01:37,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329621511] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:37,394 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:37,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 15] total 45 [2021-12-06 18:01:37,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852112729] [2021-12-06 18:01:37,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:37,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-12-06 18:01:37,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:37,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-12-06 18:01:37,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=1517, Unknown=0, NotChecked=0, Total=1980 [2021-12-06 18:01:37,396 INFO L87 Difference]: Start difference. First operand 105 states and 112 transitions. Second operand has 45 states, 45 states have (on average 4.377777777777778) internal successors, (197), 45 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:37,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:37,768 INFO L93 Difference]: Finished difference Result 241 states and 256 transitions. [2021-12-06 18:01:37,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-06 18:01:37,768 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 4.377777777777778) internal successors, (197), 45 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-12-06 18:01:37,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:37,769 INFO L225 Difference]: With dead ends: 241 [2021-12-06 18:01:37,769 INFO L226 Difference]: Without dead ends: 116 [2021-12-06 18:01:37,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=784, Invalid=2296, Unknown=0, NotChecked=0, Total=3080 [2021-12-06 18:01:37,771 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 450 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 631 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:37,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 253 Invalid, 631 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 18:01:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-06 18:01:37,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 109. [2021-12-06 18:01:37,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0648148148148149) internal successors, (115), 108 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 115 transitions. [2021-12-06 18:01:37,777 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 115 transitions. Word has length 75 [2021-12-06 18:01:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:37,777 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 115 transitions. [2021-12-06 18:01:37,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 4.377777777777778) internal successors, (197), 45 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 115 transitions. [2021-12-06 18:01:37,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-12-06 18:01:37,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:37,778 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:37,797 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 18:01:37,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:37,980 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash 47583909, now seen corresponding path program 10 times [2021-12-06 18:01:37,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:37,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890305039] [2021-12-06 18:01:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:37,982 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:38,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:38,172 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 32 proven. 41 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 18:01:38,172 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890305039] [2021-12-06 18:01:38,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890305039] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:38,172 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740125814] [2021-12-06 18:01:38,172 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-06 18:01:38,172 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:38,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:38,173 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:38,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 18:01:38,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-06 18:01:38,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:38,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-06 18:01:38,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:38,388 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 18:01:38,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:38,675 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 45 proven. 28 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-06 18:01:38,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740125814] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:38,675 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:38,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 20 [2021-12-06 18:01:38,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350223552] [2021-12-06 18:01:38,676 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:38,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-12-06 18:01:38,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-12-06 18:01:38,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2021-12-06 18:01:38,676 INFO L87 Difference]: Start difference. First operand 109 states and 115 transitions. Second operand has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:38,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:01:38,861 INFO L93 Difference]: Finished difference Result 199 states and 213 transitions. [2021-12-06 18:01:38,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-06 18:01:38,861 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 81 [2021-12-06 18:01:38,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:01:38,862 INFO L225 Difference]: With dead ends: 199 [2021-12-06 18:01:38,862 INFO L226 Difference]: Without dead ends: 158 [2021-12-06 18:01:38,862 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 150 SyntacticMatches, 5 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=653, Unknown=0, NotChecked=0, Total=870 [2021-12-06 18:01:38,863 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 18:01:38,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 95 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 18:01:38,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-12-06 18:01:38,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 131. [2021-12-06 18:01:38,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0615384615384615) internal successors, (138), 130 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:38,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 138 transitions. [2021-12-06 18:01:38,870 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 138 transitions. Word has length 81 [2021-12-06 18:01:38,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:01:38,870 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 138 transitions. [2021-12-06 18:01:38,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.15) internal successors, (83), 20 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:38,871 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 138 transitions. [2021-12-06 18:01:38,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-12-06 18:01:38,871 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:01:38,871 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:01:38,891 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-12-06 18:01:39,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-06 18:01:39,073 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:01:39,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:01:39,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2118097373, now seen corresponding path program 11 times [2021-12-06 18:01:39,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:01:39,075 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417988554] [2021-12-06 18:01:39,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:01:39,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:01:39,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:01:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 12 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:01:40,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:01:40,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417988554] [2021-12-06 18:01:40,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417988554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:01:40,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395544997] [2021-12-06 18:01:40,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-06 18:01:40,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:01:40,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:01:40,284 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:01:40,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 18:01:40,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-12-06 18:01:40,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:01:40,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 32 conjunts are in the unsatisfiable core [2021-12-06 18:01:40,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:01:40,689 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 16 treesize of output 12 [2021-12-06 18:01:40,718 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:01:40,718 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 29 treesize of output 28 [2021-12-06 18:01:40,754 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:01:40,755 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 26 treesize of output 25 [2021-12-06 18:01:40,766 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:01:40,766 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 26 treesize of output 25 [2021-12-06 18:01:41,014 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 19 treesize of output 7 [2021-12-06 18:01:41,039 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 42 proven. 98 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-06 18:01:41,039 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:01:43,319 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_207| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_207| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_585 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_207| 8) (- 4)) v_ArrVal_585) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2021-12-06 18:01:54,251 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 33 treesize of output 31 [2021-12-06 18:01:54,253 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 856 treesize of output 840 [2021-12-06 18:01:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 42 proven. 95 refuted. 0 times theorem prover too weak. 30 trivial. 3 not checked. [2021-12-06 18:01:54,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [395544997] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:01:54,464 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:01:54,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15, 17] total 51 [2021-12-06 18:01:54,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50970990] [2021-12-06 18:01:54,464 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:01:54,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-06 18:01:54,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:01:54,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-06 18:01:54,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=2212, Unknown=11, NotChecked=96, Total=2550 [2021-12-06 18:01:54,466 INFO L87 Difference]: Start difference. First operand 131 states and 138 transitions. Second operand has 51 states, 51 states have (on average 4.0588235294117645) internal successors, (207), 51 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:01:57,662 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse5 (div c_~CELLCOUNT~0 2)) (.cse2 (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|)) (.cse3 (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0))) (let ((.cse1 (* |c_ULTIMATE.start_main_~i~0#1| 4)) (.cse6 (and (<= 3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* .cse5 8) (- 8)))) (= (* 8 .cse5) 32) .cse2 .cse3)) (.cse4 (+ |c_ULTIMATE.start_main_~i~0#1| 1))) (and (<= 3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12 .cse1))) (<= |c_ULTIMATE.start_main_~i~0#1| 3) (= 3 |c_ULTIMATE.start_main_~i~0#1|) (<= (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 4))) 0) (<= 3 (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 24))) .cse2 (< (select .cse0 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1)) |c_ULTIMATE.start_main_~MINVAL~0#1|) .cse3 (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (or (< .cse4 .cse5) .cse6 (and (< c_~CELLCOUNT~0 0) (not (= c_~CELLCOUNT~0 (* 2 .cse5))))) (= |c_ULTIMATE.start_main_~CCCELVOL2~0#1| 3) (or (< 4 .cse5) .cse6) (forall ((|v_ULTIMATE.start_main_~i~0#1_207| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_207| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_585 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_207| 8) (- 4)) v_ArrVal_585) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (<= .cse4 .cse5) (<= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|)))) is different from false [2021-12-06 18:01:59,820 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse0 (div c_~CELLCOUNT~0 2)) (.cse1 (= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|)) (.cse3 (= |c_ULTIMATE.start_main_~#volArray~0#1.offset| 0)) (.cse2 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|))) (and (or (and (<= |c_ULTIMATE.start_main_~i~0#1| .cse0) (< c_~CELLCOUNT~0 0) (not (= c_~CELLCOUNT~0 (* 2 .cse0)))) (and (= (* 8 |c_ULTIMATE.start_main_~i~0#1|) 32) .cse1 (<= 3 (select .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 8)))) .cse3) (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) .cse0)) (or (< 4 .cse0) (and (<= 3 (select .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* .cse0 8) (- 8)))) (= (* 8 .cse0) 32) .cse1 .cse3)) (forall ((|v_ULTIMATE.start_main_~i~0#1_207| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_207| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_585 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_207| 8) (- 4)) v_ArrVal_585) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) |c_ULTIMATE.start_main_~MINVAL~0#1|)))) (<= 2 |c_ULTIMATE.start_main_~MINVAL~0#1|) (<= 4 |c_ULTIMATE.start_main_~i~0#1|) (<= (select .cse2 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0))) is different from false [2021-12-06 18:02:00,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:00,747 INFO L93 Difference]: Finished difference Result 230 states and 247 transitions. [2021-12-06 18:02:00,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-12-06 18:02:00,748 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 4.0588235294117645) internal successors, (207), 51 states have internal predecessors, (207), 0 states have call successors, (0), 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 83 [2021-12-06 18:02:00,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:00,749 INFO L225 Difference]: With dead ends: 230 [2021-12-06 18:02:00,749 INFO L226 Difference]: Without dead ends: 220 [2021-12-06 18:02:00,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 157 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 2331 ImplicationChecksByTransitivity, 19.2s TimeCoverageRelationStatistics Valid=810, Invalid=7745, Unknown=13, NotChecked=552, Total=9120 [2021-12-06 18:02:00,752 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 444 mSDsluCounter, 777 mSDsCounter, 0 mSdLazyCounter, 1777 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 812 SdHoareTripleChecker+Invalid, 2248 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 228 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:00,752 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [444 Valid, 812 Invalid, 2248 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1777 Invalid, 0 Unknown, 228 Unchecked, 0.7s Time] [2021-12-06 18:02:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-12-06 18:02:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 180. [2021-12-06 18:02:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0614525139664805) internal successors, (190), 179 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 190 transitions. [2021-12-06 18:02:00,762 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 190 transitions. Word has length 83 [2021-12-06 18:02:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:00,762 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 190 transitions. [2021-12-06 18:02:00,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 4.0588235294117645) internal successors, (207), 51 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:00,762 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 190 transitions. [2021-12-06 18:02:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-12-06 18:02:00,763 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:00,763 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:00,767 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 18:02:00,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-12-06 18:02:00,965 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:02:00,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:00,966 INFO L85 PathProgramCache]: Analyzing trace with hash -1392057312, now seen corresponding path program 12 times [2021-12-06 18:02:00,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:02:00,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760799399] [2021-12-06 18:02:00,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:00,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:02:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:01,803 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 1 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:01,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:02:01,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760799399] [2021-12-06 18:02:01,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760799399] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:02:01,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036545658] [2021-12-06 18:02:01,803 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-06 18:02:01,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:01,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:02:01,804 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:02:01,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 18:02:02,033 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-12-06 18:02:02,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:02:02,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-06 18:02:02,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:02,076 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 16 treesize of output 12 [2021-12-06 18:02:02,106 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:02:02,106 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 29 treesize of output 28 [2021-12-06 18:02:02,156 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:02:02,156 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 29 treesize of output 28 [2021-12-06 18:02:02,173 INFO L354 Elim1Store]: treesize reduction 60, result has 16.7 percent of original size [2021-12-06 18:02:02,174 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 38 treesize of output 28 [2021-12-06 18:02:02,252 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:02:02,252 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 29 treesize of output 28 [2021-12-06 18:02:02,270 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:02:02,270 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 29 treesize of output 28 [2021-12-06 18:02:02,503 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:02:02,504 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 42 treesize of output 20 [2021-12-06 18:02:02,523 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 3 proven. 122 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-12-06 18:02:02,523 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:02:04,665 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_233| Int)) (or (forall ((v_ArrVal_682 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0)) (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:02:05,188 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_682 Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0))) is different from false [2021-12-06 18:02:13,131 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_234| Int)) (or (forall ((v_ArrVal_682 Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int) (v_ArrVal_677 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |v_ULTIMATE.start_main_~i~0#1_234| 1)) (= (select (store (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_234| 8))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse2) v_ArrVal_677)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse2 (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0))) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:02:15,164 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_675 Int) (|v_ULTIMATE.start_main_~i~0#1_234| Int) (v_ArrVal_682 Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int) (v_ArrVal_677 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |v_ULTIMATE.start_main_~i~0#1_234| 1)) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_234| 8))) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 8)) v_ArrVal_675) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse2) v_ArrVal_677)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse2 (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0))) is different from false [2021-12-06 18:02:15,177 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 82 treesize of output 78 [2021-12-06 18:02:15,183 INFO L354 Elim1Store]: treesize reduction 14, result has 6.7 percent of original size [2021-12-06 18:02:15,183 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 9120 treesize of output 8892 [2021-12-06 18:02:15,613 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 45 trivial. 14 not checked. [2021-12-06 18:02:15,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036545658] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:02:15,613 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:02:15,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 16, 20] total 42 [2021-12-06 18:02:15,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166263671] [2021-12-06 18:02:15,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:02:15,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-12-06 18:02:15,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:02:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-12-06 18:02:15,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=1211, Unknown=15, NotChecked=300, Total=1722 [2021-12-06 18:02:15,615 INFO L87 Difference]: Start difference. First operand 180 states and 190 transitions. Second operand has 42 states, 42 states have (on average 3.7857142857142856) internal successors, (159), 42 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:17,673 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~i~0#1| 3) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (forall ((v_ArrVal_675 Int) (|v_ULTIMATE.start_main_~i~0#1_234| Int) (v_ArrVal_682 Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int) (v_ArrVal_677 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |v_ULTIMATE.start_main_~i~0#1_234| 1)) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_234| 8))) (let ((.cse0 (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 8)) v_ArrVal_675) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse2) v_ArrVal_677)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse2 (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0))) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 4))) 0)) is different from false [2021-12-06 18:02:19,682 WARN L838 $PredicateComparison]: unable to prove that (and (<= |c_ULTIMATE.start_main_~i~0#1| 3) (forall ((|v_ULTIMATE.start_main_~i~0#1_234| Int)) (or (forall ((v_ArrVal_682 Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int) (v_ArrVal_677 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |v_ULTIMATE.start_main_~i~0#1_234| 1)) (= (select (store (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_234| 8))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse2) v_ArrVal_677)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse2 (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0))) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 4))) 0)) is different from false [2021-12-06 18:02:20,322 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_682 Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0))) (exists ((|v_ULTIMATE.start_main_~i~0#1_219| Int)) (and (<= 3 |v_ULTIMATE.start_main_~i~0#1_219|) (<= |v_ULTIMATE.start_main_~i~0#1_219| 3) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_219| 8) (- 4))) 0) (<= (+ |v_ULTIMATE.start_main_~i~0#1_219| 1) |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2021-12-06 18:02:22,443 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~i~0#1_233| Int)) (or (forall ((v_ArrVal_682 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0)) (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (exists ((|v_ULTIMATE.start_main_~i~0#1_219| Int)) (and (<= 3 |v_ULTIMATE.start_main_~i~0#1_219|) (<= |v_ULTIMATE.start_main_~i~0#1_219| 3) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_219| 8) (- 4))) 0) (<= (+ |v_ULTIMATE.start_main_~i~0#1_219| 1) |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2021-12-06 18:02:24,447 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse4 (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 4))) 0))) (and (<= |c_ULTIMATE.start_main_~i~0#1| 3) (forall ((|v_ULTIMATE.start_main_~i~0#1_234| Int)) (or (forall ((v_ArrVal_682 Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int) (v_ArrVal_677 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |v_ULTIMATE.start_main_~i~0#1_234| 1)) (= (select (store (let ((.cse2 (* |v_ULTIMATE.start_main_~i~0#1_234| 8))) (let ((.cse0 (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse2) v_ArrVal_677)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse2 (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1)))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0))) (< |v_ULTIMATE.start_main_~i~0#1_234| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (let ((.cse5 (div c_~CELLCOUNT~0 2))) (let ((.cse3 (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) .cse5))) (or (and (= (* 8 |c_ULTIMATE.start_main_~i~0#1|) 24) .cse3 .cse4) (and .cse3 (< c_~CELLCOUNT~0 0) (not (= c_~CELLCOUNT~0 (* 2 .cse5)))) (<= (+ 3 |c_ULTIMATE.start_main_~i~0#1|) .cse5)))) (<= 3 |c_ULTIMATE.start_main_~i~0#1|) .cse4)) is different from false [2021-12-06 18:02:25,115 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (div c_~CELLCOUNT~0 2))) (let ((.cse3 (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) .cse0)) (.cse1 (< c_~CELLCOUNT~0 0)) (.cse2 (not (= c_~CELLCOUNT~0 (* 2 .cse0))))) (or (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0) (or (and (<= |c_ULTIMATE.start_main_~i~0#1| .cse0) .cse1 .cse2) .cse3) (not (= (* 8 .cse0) 24))) (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) .cse0) (and .cse3 .cse1 .cse2)))) (forall ((v_ArrVal_682 Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store (let ((.cse4 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse5 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 8)))) (store .cse4 .cse5 (select .cse4 .cse5))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0))) (exists ((|v_ULTIMATE.start_main_~i~0#1_219| Int)) (and (<= 3 |v_ULTIMATE.start_main_~i~0#1_219|) (<= |v_ULTIMATE.start_main_~i~0#1_219| 3) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_219| 8) (- 4))) 0) (<= (+ |v_ULTIMATE.start_main_~i~0#1_219| 1) |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2021-12-06 18:02:27,124 WARN L838 $PredicateComparison]: unable to prove that (and (let ((.cse0 (div c_~CELLCOUNT~0 2))) (let ((.cse3 (<= (+ |c_ULTIMATE.start_main_~i~0#1| 1) .cse0)) (.cse1 (< c_~CELLCOUNT~0 0)) (.cse2 (not (= c_~CELLCOUNT~0 (* 2 .cse0))))) (or (and (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0) (or (and (<= |c_ULTIMATE.start_main_~i~0#1| .cse0) .cse1 .cse2) .cse3) (not (= (* 8 .cse0) 24))) (<= (+ 2 |c_ULTIMATE.start_main_~i~0#1|) .cse0) (and .cse3 .cse1 .cse2)))) (forall ((|v_ULTIMATE.start_main_~i~0#1_233| Int)) (or (forall ((v_ArrVal_682 Int)) (= (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0)) (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) (exists ((|v_ULTIMATE.start_main_~i~0#1_219| Int)) (and (<= 3 |v_ULTIMATE.start_main_~i~0#1_219|) (<= |v_ULTIMATE.start_main_~i~0#1_219| 3) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_219| 8) (- 4))) 0) (<= (+ |v_ULTIMATE.start_main_~i~0#1_219| 1) |c_ULTIMATE.start_main_~i~0#1|)))) is different from false [2021-12-06 18:02:27,675 WARN L838 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_main_~i~0#1_219| Int)) (and (<= 3 |v_ULTIMATE.start_main_~i~0#1_219|) (<= |v_ULTIMATE.start_main_~i~0#1_219| 3) (= (select (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_219| 8) (- 4))) 0) (<= (+ 2 |v_ULTIMATE.start_main_~i~0#1_219|) |c_ULTIMATE.start_main_~i~0#1|))) (forall ((v_ArrVal_682 Int) (|v_ULTIMATE.start_main_~i~0#1_233| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_233| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (= (select (store (let ((.cse0 (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|)) (.cse1 (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |c_ULTIMATE.start_main_~i~0#1| 8) (- 8)))) (store .cse0 .cse1 (select .cse0 .cse1))) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (* |v_ULTIMATE.start_main_~i~0#1_233| 8) (- 4)) v_ArrVal_682) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 20)) 0)))) is different from false [2021-12-06 18:02:28,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:28,436 INFO L93 Difference]: Finished difference Result 258 states and 276 transitions. [2021-12-06 18:02:28,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-12-06 18:02:28,436 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.7857142857142856) internal successors, (159), 42 states have internal predecessors, (159), 0 states have call successors, (0), 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 85 [2021-12-06 18:02:28,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:28,437 INFO L225 Difference]: With dead ends: 258 [2021-12-06 18:02:28,437 INFO L226 Difference]: Without dead ends: 256 [2021-12-06 18:02:28,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 166 SyntacticMatches, 9 SemanticMatches, 93 ConstructedPredicates, 12 IntricatePredicates, 1 DeprecatedPredicates, 1983 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=804, Invalid=6027, Unknown=23, NotChecked=2076, Total=8930 [2021-12-06 18:02:28,439 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 297 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 1896 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 590 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:28,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 438 Invalid, 1896 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 1156 Invalid, 0 Unknown, 590 Unchecked, 0.5s Time] [2021-12-06 18:02:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-12-06 18:02:28,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 186. [2021-12-06 18:02:28,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0648648648648649) internal successors, (197), 185 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:28,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 197 transitions. [2021-12-06 18:02:28,454 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 197 transitions. Word has length 85 [2021-12-06 18:02:28,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:28,454 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 197 transitions. [2021-12-06 18:02:28,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.7857142857142856) internal successors, (159), 42 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:28,454 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 197 transitions. [2021-12-06 18:02:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-12-06 18:02:28,455 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:28,455 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:28,475 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 18:02:28,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-12-06 18:02:28,657 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:02:28,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:28,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1479714958, now seen corresponding path program 13 times [2021-12-06 18:02:28,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:02:28,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820487904] [2021-12-06 18:02:28,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:28,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:02:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:29,208 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:02:29,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820487904] [2021-12-06 18:02:29,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820487904] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:02:29,208 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419890103] [2021-12-06 18:02:29,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-06 18:02:29,208 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:29,208 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:02:29,209 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:02:29,209 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-12-06 18:02:29,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:29,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-06 18:02:29,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:29,319 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 16 treesize of output 12 [2021-12-06 18:02:29,350 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:02:29,350 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 29 treesize of output 28 [2021-12-06 18:02:29,642 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-12-06 18:02:29,642 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 42 treesize of output 20 [2021-12-06 18:02:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:02:29,661 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:02:29,769 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 17 treesize of output 15 [2021-12-06 18:02:29,771 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 30 treesize of output 26 [2021-12-06 18:02:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-12-06 18:02:29,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419890103] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 18:02:29,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-06 18:02:29,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 17, 17] total 34 [2021-12-06 18:02:29,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861632689] [2021-12-06 18:02:29,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-06 18:02:29,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-06 18:02:29,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 18:02:29,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-06 18:02:29,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-12-06 18:02:29,808 INFO L87 Difference]: Start difference. First operand 186 states and 197 transitions. Second operand has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:32,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 18:02:32,341 INFO L93 Difference]: Finished difference Result 298 states and 324 transitions. [2021-12-06 18:02:32,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-12-06 18:02:32,341 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 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 89 [2021-12-06 18:02:32,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 18:02:32,343 INFO L225 Difference]: With dead ends: 298 [2021-12-06 18:02:32,343 INFO L226 Difference]: Without dead ends: 296 [2021-12-06 18:02:32,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 163 SyntacticMatches, 7 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4304 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1470, Invalid=11870, Unknown=0, NotChecked=0, Total=13340 [2021-12-06 18:02:32,345 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 628 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 1948 mSolverCounterSat, 365 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 628 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 2313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 365 IncrementalHoareTripleChecker+Valid, 1948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-06 18:02:32,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [628 Valid, 481 Invalid, 2313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [365 Valid, 1948 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-06 18:02:32,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-06 18:02:32,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 200. [2021-12-06 18:02:32,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0753768844221105) internal successors, (214), 199 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:32,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 214 transitions. [2021-12-06 18:02:32,358 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 214 transitions. Word has length 89 [2021-12-06 18:02:32,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 18:02:32,358 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 214 transitions. [2021-12-06 18:02:32,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.794117647058823) internal successors, (163), 34 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 18:02:32,358 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 214 transitions. [2021-12-06 18:02:32,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-06 18:02:32,362 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 18:02:32,362 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 18:02:32,393 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-12-06 18:02:32,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-12-06 18:02:32,563 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 18:02:32,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 18:02:32,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1601496303, now seen corresponding path program 14 times [2021-12-06 18:02:32,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 18:02:32,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062571894] [2021-12-06 18:02:32,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 18:02:32,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 18:02:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 18:02:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 12 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 18:02:34,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 18:02:34,062 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062571894] [2021-12-06 18:02:34,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062571894] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-06 18:02:34,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029381657] [2021-12-06 18:02:34,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 18:02:34,063 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 18:02:34,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 18:02:34,063 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 18:02:34,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f69e1027-be23-41da-8578-f64633dcd6c7/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-12-06 18:02:34,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 18:02:34,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 18:02:34,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 36 conjunts are in the unsatisfiable core [2021-12-06 18:02:34,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 18:02:34,220 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 16 treesize of output 12 [2021-12-06 18:02:34,253 INFO L354 Elim1Store]: treesize reduction 42, result has 22.2 percent of original size [2021-12-06 18:02:34,253 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 29 treesize of output 28 [2021-12-06 18:02:34,296 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:02:34,296 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 26 treesize of output 25 [2021-12-06 18:02:34,311 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:02:34,311 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 26 treesize of output 25 [2021-12-06 18:02:34,354 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:02:34,354 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 26 treesize of output 25 [2021-12-06 18:02:34,366 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:02:34,367 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 26 treesize of output 25 [2021-12-06 18:02:34,410 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:02:34,410 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 26 treesize of output 25 [2021-12-06 18:02:34,423 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-12-06 18:02:34,423 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 26 treesize of output 25 [2021-12-06 18:02:34,620 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 19 treesize of output 7 [2021-12-06 18:02:34,658 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 76 proven. 59 refuted. 0 times theorem prover too weak. 69 trivial. 0 not checked. [2021-12-06 18:02:34,658 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 18:02:36,915 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_276| Int)) (or (forall ((v_ArrVal_854 Int)) (< (select (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_276| 8)) v_ArrVal_854) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|)) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:03:06,154 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_277| Int)) (or (forall ((v_ArrVal_852 Int) (v_ArrVal_850 Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int) (v_ArrVal_854 Int)) (or (< (select (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_277| 8))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse0) v_ArrVal_850) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (- 8)) v_ArrVal_852)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_276| 8)) v_ArrVal_854) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|) (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)))) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |c_ULTIMATE.start_main_~i~0#1| 1)))) is different from false [2021-12-06 18:03:54,186 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~i~0#1_278| Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_278| (+ |c_ULTIMATE.start_main_~i~0#1| 1)) (forall ((v_ArrVal_852 Int) (v_ArrVal_850 Int) (|v_ULTIMATE.start_main_~i~0#1_277| Int) (|v_ULTIMATE.start_main_~i~0#1_276| Int) (v_ArrVal_848 Int) (v_ArrVal_845 Int) (v_ArrVal_854 Int)) (or (< |v_ULTIMATE.start_main_~i~0#1_276| (+ |v_ULTIMATE.start_main_~i~0#1_277| 1)) (< |v_ULTIMATE.start_main_~i~0#1_277| (+ |v_ULTIMATE.start_main_~i~0#1_278| 1)) (< (select (store (let ((.cse1 (* |v_ULTIMATE.start_main_~i~0#1_277| 8))) (store (store (let ((.cse0 (* |v_ULTIMATE.start_main_~i~0#1_278| 8))) (store (store (select |c_#memory_int| |c_ULTIMATE.start_main_~#volArray~0#1.base|) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse0) v_ArrVal_845) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse0 (- 8)) v_ArrVal_848)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) .cse1) v_ArrVal_850) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| .cse1 (- 8)) v_ArrVal_852)) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| (- 4) (* |v_ULTIMATE.start_main_~i~0#1_276| 8)) v_ArrVal_854) (+ |c_ULTIMATE.start_main_~#volArray~0#1.offset| 12)) |c_ULTIMATE.start_main_~MINVAL~0#1|))))) is different from false [2021-12-06 18:04:01,203 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 65 treesize of output 63 [2021-12-06 18:04:01,227 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 28344296 treesize of output 28311528 [2021-12-06 18:05:12,573 WARN L227 SmtUtils]: Spent 1.19m on a formula simplification that was a NOOP. DAG size: 2689 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-12-06 18:12:12,207 WARN L227 SmtUtils]: Spent 5.82m on a formula simplification. DAG size of input: 2682 DAG size of output: 2682 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)