./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-fpi/eqn4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-fpi/eqn4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 7bfa83e4265de8b9a1bd21dc33b28b63f68994b9952943e0726905cc1e10334a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 06:28:12,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 06:28:12,688 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 06:28:12,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 06:28:12,741 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 06:28:12,745 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 06:28:12,747 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 06:28:12,751 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 06:28:12,754 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 06:28:12,759 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 06:28:12,760 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 06:28:12,762 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 06:28:12,763 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 06:28:12,765 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 06:28:12,767 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 06:28:12,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 06:28:12,769 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 06:28:12,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 06:28:12,772 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 06:28:12,775 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 06:28:12,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 06:28:12,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 06:28:12,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 06:28:12,780 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 06:28:12,784 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 06:28:12,784 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 06:28:12,784 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 06:28:12,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 06:28:12,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 06:28:12,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 06:28:12,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 06:28:12,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 06:28:12,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 06:28:12,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 06:28:12,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 06:28:12,792 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 06:28:12,793 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 06:28:12,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 06:28:12,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 06:28:12,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 06:28:12,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 06:28:12,796 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 06:28:12,839 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 06:28:12,840 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 06:28:12,840 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 06:28:12,840 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 06:28:12,850 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 06:28:12,850 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 06:28:12,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 06:28:12,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 06:28:12,851 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 06:28:12,852 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 06:28:12,852 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 06:28:12,853 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 06:28:12,853 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 06:28:12,853 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 06:28:12,853 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 06:28:12,854 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 06:28:12,854 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 06:28:12,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 06:28:12,854 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 06:28:12,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 06:28:12,854 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 06:28:12,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 06:28:12,855 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 06:28:12,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 06:28:12,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:28:12,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 06:28:12,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 06:28:12,856 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 06:28:12,856 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 06:28:12,858 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 06:28:12,858 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 06:28:12,858 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 06:28:12,858 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 06:28:12,859 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 06:28:12,859 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_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7bfa83e4265de8b9a1bd21dc33b28b63f68994b9952943e0726905cc1e10334a [2021-11-20 06:28:13,114 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 06:28:13,138 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 06:28:13,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 06:28:13,141 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 06:28:13,142 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 06:28:13,144 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/array-fpi/eqn4.c [2021-11-20 06:28:13,212 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/data/c396fd4d2/6758482d82104a199634d630c94ceb3b/FLAGcdd5a2140 [2021-11-20 06:28:13,621 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 06:28:13,622 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/sv-benchmarks/c/array-fpi/eqn4.c [2021-11-20 06:28:13,628 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/data/c396fd4d2/6758482d82104a199634d630c94ceb3b/FLAGcdd5a2140 [2021-11-20 06:28:13,640 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/data/c396fd4d2/6758482d82104a199634d630c94ceb3b [2021-11-20 06:28:13,649 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 06:28:13,650 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 06:28:13,653 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 06:28:13,653 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 06:28:13,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 06:28:13,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,672 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46043f53 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13, skipping insertion in model container [2021-11-20 06:28:13,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,680 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 06:28:13,693 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 06:28:13,852 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_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/sv-benchmarks/c/array-fpi/eqn4.c[587,600] [2021-11-20 06:28:13,872 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:28:13,880 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 06:28:13,892 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_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/sv-benchmarks/c/array-fpi/eqn4.c[587,600] [2021-11-20 06:28:13,901 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 06:28:13,914 INFO L208 MainTranslator]: Completed translation [2021-11-20 06:28:13,915 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13 WrapperNode [2021-11-20 06:28:13,915 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 06:28:13,916 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 06:28:13,916 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 06:28:13,917 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 06:28:13,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,931 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,952 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 79 [2021-11-20 06:28:13,953 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 06:28:13,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 06:28:13,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 06:28:13,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 06:28:13,962 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,963 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,965 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,965 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,971 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,977 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,979 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 06:28:13,980 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 06:28:13,980 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 06:28:13,980 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 06:28:13,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (1/1) ... [2021-11-20 06:28:13,989 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 06:28:14,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:14,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 06:28:14,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 06:28:14,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 06:28:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 06:28:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-20 06:28:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 06:28:14,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 06:28:14,063 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 06:28:14,064 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-20 06:28:14,128 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 06:28:14,130 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 06:28:14,273 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 06:28:14,279 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 06:28:14,280 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-11-20 06:28:14,282 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:28:14 BoogieIcfgContainer [2021-11-20 06:28:14,282 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 06:28:14,284 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 06:28:14,284 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 06:28:14,287 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 06:28:14,287 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 06:28:13" (1/3) ... [2021-11-20 06:28:14,288 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ad6bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:28:14, skipping insertion in model container [2021-11-20 06:28:14,288 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 06:28:13" (2/3) ... [2021-11-20 06:28:14,289 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71ad6bb2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 06:28:14, skipping insertion in model container [2021-11-20 06:28:14,289 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 06:28:14" (3/3) ... [2021-11-20 06:28:14,291 INFO L111 eAbstractionObserver]: Analyzing ICFG eqn4.c [2021-11-20 06:28:14,296 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 06:28:14,296 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 06:28:14,343 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 06:28:14,350 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 06:28:14,350 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 06:28:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:28:14,369 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:14,370 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:14,370 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:14,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1828546148, now seen corresponding path program 1 times [2021-11-20 06:28:14,384 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:14,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144175553] [2021-11-20 06:28:14,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:14,386 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:14,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:14,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:14,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:14,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144175553] [2021-11-20 06:28:14,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144175553] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:14,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:14,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-20 06:28:14,527 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246434359] [2021-11-20 06:28:14,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:14,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-20 06:28:14,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-20 06:28:14,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:28:14,597 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 20 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:14,611 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2021-11-20 06:28:14,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-20 06:28:14,613 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 06:28:14,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:14,620 INFO L225 Difference]: With dead ends: 38 [2021-11-20 06:28:14,620 INFO L226 Difference]: Without dead ends: 17 [2021-11-20 06:28:14,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-20 06:28:14,627 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:14,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-20 06:28:14,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-20 06:28:14,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-20 06:28:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2021-11-20 06:28:14,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 12 [2021-11-20 06:28:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:14,675 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2021-11-20 06:28:14,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2021-11-20 06:28:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-20 06:28:14,676 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:14,676 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:14,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 06:28:14,677 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:14,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:14,678 INFO L85 PathProgramCache]: Analyzing trace with hash -1148487778, now seen corresponding path program 1 times [2021-11-20 06:28:14,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:14,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063168182] [2021-11-20 06:28:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:14,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:14,701 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:28:14,701 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1473632339] [2021-11-20 06:28:14,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:14,710 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:14,710 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:14,715 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:14,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 06:28:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:14,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 06:28:14,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:14,886 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-20 06:28:14,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 23 [2021-11-20 06:28:15,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:15,081 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:28:15,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063168182] [2021-11-20 06:28:15,082 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:28:15,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473632339] [2021-11-20 06:28:15,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473632339] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:15,083 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:15,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:28:15,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561878007] [2021-11-20 06:28:15,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:15,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:28:15,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:15,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:28:15,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:28:15,103 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:15,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:15,207 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2021-11-20 06:28:15,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:28:15,208 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-11-20 06:28:15,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:15,209 INFO L225 Difference]: With dead ends: 34 [2021-11-20 06:28:15,209 INFO L226 Difference]: Without dead ends: 32 [2021-11-20 06:28:15,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:28:15,212 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 12 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:15,213 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 56 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:28:15,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-20 06:28:15,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 23. [2021-11-20 06:28:15,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:15,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2021-11-20 06:28:15,219 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 12 [2021-11-20 06:28:15,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:15,220 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2021-11-20 06:28:15,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:15,220 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2021-11-20 06:28:15,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:28:15,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:15,222 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:15,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:15,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:15,430 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:15,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1755224028, now seen corresponding path program 1 times [2021-11-20 06:28:15,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:15,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504779528] [2021-11-20 06:28:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:15,432 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:15,458 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:28:15,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [428153594] [2021-11-20 06:28:15,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:15,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:15,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:15,460 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:15,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 06:28:15,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:15,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:28:15,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:15,654 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:28:15,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:15,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504779528] [2021-11-20 06:28:15,655 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:28:15,655 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428153594] [2021-11-20 06:28:15,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428153594] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:15,655 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:15,655 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 06:28:15,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553549134] [2021-11-20 06:28:15,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:15,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 06:28:15,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:15,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 06:28:15,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-20 06:28:15,658 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:15,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:15,742 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2021-11-20 06:28:15,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-20 06:28:15,743 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 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 14 [2021-11-20 06:28:15,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:15,744 INFO L225 Difference]: With dead ends: 49 [2021-11-20 06:28:15,744 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 06:28:15,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-20 06:28:15,747 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 26 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:15,748 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 29 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:28:15,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 06:28:15,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 23. [2021-11-20 06:28:15,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2021-11-20 06:28:15,755 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 14 [2021-11-20 06:28:15,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:15,755 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2021-11-20 06:28:15,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2021-11-20 06:28:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-20 06:28:15,757 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:15,757 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:15,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-11-20 06:28:15,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:15,971 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:15,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:15,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1842440164, now seen corresponding path program 1 times [2021-11-20 06:28:15,972 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:15,972 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392291507] [2021-11-20 06:28:15,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:15,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:16,013 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:28:16,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1671475394] [2021-11-20 06:28:16,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:16,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:16,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:16,031 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:16,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 06:28:16,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-20 06:28:16,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:16,172 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:16,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:16,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:16,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392291507] [2021-11-20 06:28:16,244 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:28:16,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671475394] [2021-11-20 06:28:16,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671475394] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:16,244 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:16,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-20 06:28:16,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613035708] [2021-11-20 06:28:16,245 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:16,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:28:16,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:16,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:28:16,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:28:16,249 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:16,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:16,381 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2021-11-20 06:28:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-20 06:28:16,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-11-20 06:28:16,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:16,383 INFO L225 Difference]: With dead ends: 44 [2021-11-20 06:28:16,383 INFO L226 Difference]: Without dead ends: 37 [2021-11-20 06:28:16,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-20 06:28:16,393 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:16,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 46 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:28:16,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-20 06:28:16,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 24. [2021-11-20 06:28:16,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:16,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2021-11-20 06:28:16,412 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 14 [2021-11-20 06:28:16,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:16,413 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2021-11-20 06:28:16,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:16,416 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2021-11-20 06:28:16,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:28:16,417 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:16,417 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:16,455 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:16,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:16,638 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:16,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:16,639 INFO L85 PathProgramCache]: Analyzing trace with hash -1667884396, now seen corresponding path program 1 times [2021-11-20 06:28:16,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:16,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648235311] [2021-11-20 06:28:16,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:16,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:16,655 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:28:16,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1545075591] [2021-11-20 06:28:16,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:16,656 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:16,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:16,694 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:16,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 06:28:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:16,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 06:28:16,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:16,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:16,822 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 06:28:16,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:16,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648235311] [2021-11-20 06:28:16,822 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:28:16,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545075591] [2021-11-20 06:28:16,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545075591] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 06:28:16,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 06:28:16,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-20 06:28:16,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658196397] [2021-11-20 06:28:16,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 06:28:16,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-20 06:28:16,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:16,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-20 06:28:16,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-20 06:28:16,825 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:16,901 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2021-11-20 06:28:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 06:28:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:28:16,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:16,903 INFO L225 Difference]: With dead ends: 41 [2021-11-20 06:28:16,903 INFO L226 Difference]: Without dead ends: 27 [2021-11-20 06:28:16,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:28:16,905 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:16,905 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 32 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:28:16,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-20 06:28:16,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 19. [2021-11-20 06:28:16,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:16,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2021-11-20 06:28:16,909 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 16 [2021-11-20 06:28:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:16,910 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2021-11-20 06:28:16,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:16,910 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2021-11-20 06:28:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-20 06:28:16,911 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:16,911 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:16,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:17,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:17,126 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:17,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:17,127 INFO L85 PathProgramCache]: Analyzing trace with hash 586911962, now seen corresponding path program 1 times [2021-11-20 06:28:17,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:17,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417665996] [2021-11-20 06:28:17,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:17,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:17,170 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:28:17,178 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [577134279] [2021-11-20 06:28:17,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:17,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:17,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:17,180 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:17,193 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 06:28:17,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:28:17,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 06:28:17,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:17,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:28:17,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:28:17,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:17,415 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:28:17,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 32 [2021-11-20 06:28:17,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:17,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:17,582 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-20 06:28:17,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 45 treesize of output 42 [2021-11-20 06:28:17,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:17,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:18,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:18,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417665996] [2021-11-20 06:28:18,633 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:28:18,633 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577134279] [2021-11-20 06:28:18,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577134279] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:18,634 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:18,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-11-20 06:28:18,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445962533] [2021-11-20 06:28:18,634 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:18,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-20 06:28:18,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-20 06:28:18,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-20 06:28:18,636 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:20,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:20,473 INFO L93 Difference]: Finished difference Result 74 states and 84 transitions. [2021-11-20 06:28:20,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 06:28:20,474 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-20 06:28:20,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:20,476 INFO L225 Difference]: With dead ends: 74 [2021-11-20 06:28:20,476 INFO L226 Difference]: Without dead ends: 72 [2021-11-20 06:28:20,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=187, Invalid=515, Unknown=0, NotChecked=0, Total=702 [2021-11-20 06:28:20,478 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 33 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:20,478 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 108 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 109 Invalid, 0 Unknown, 33 Unchecked, 0.5s Time] [2021-11-20 06:28:20,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-20 06:28:20,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 39. [2021-11-20 06:28:20,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1842105263157894) internal successors, (45), 38 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:20,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 45 transitions. [2021-11-20 06:28:20,495 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 45 transitions. Word has length 16 [2021-11-20 06:28:20,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:20,495 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 45 transitions. [2021-11-20 06:28:20,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:20,496 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 45 transitions. [2021-11-20 06:28:20,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 06:28:20,497 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:20,497 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:20,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:20,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:20,714 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:20,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:20,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1334592554, now seen corresponding path program 2 times [2021-11-20 06:28:20,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:20,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035873583] [2021-11-20 06:28:20,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:20,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:20,748 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:28:20,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118801999] [2021-11-20 06:28:20,750 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:28:20,751 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:20,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:20,752 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:20,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 06:28:20,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:28:20,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:28:20,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-20 06:28:20,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:28:20,890 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:20,951 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 06:28:20,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:20,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035873583] [2021-11-20 06:28:20,951 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:28:20,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118801999] [2021-11-20 06:28:20,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118801999] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:20,952 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:20,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-20 06:28:20,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994878891] [2021-11-20 06:28:20,953 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:20,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 06:28:20,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:20,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 06:28:20,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-20 06:28:20,954 INFO L87 Difference]: Start difference. First operand 39 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-11-20 06:28:21,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:28:21,074 INFO L93 Difference]: Finished difference Result 77 states and 86 transitions. [2021-11-20 06:28:21,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:28:21,075 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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 20 [2021-11-20 06:28:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:28:21,076 INFO L225 Difference]: With dead ends: 77 [2021-11-20 06:28:21,076 INFO L226 Difference]: Without dead ends: 63 [2021-11-20 06:28:21,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-11-20 06:28:21,077 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:28:21,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:28:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-20 06:28:21,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 39. [2021-11-20 06:28:21,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 38 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:28:21,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2021-11-20 06:28:21,090 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 20 [2021-11-20 06:28:21,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:28:21,090 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2021-11-20 06:28:21,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 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) [2021-11-20 06:28:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2021-11-20 06:28:21,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 06:28:21,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:28:21,092 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:28:21,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-20 06:28:21,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-20 06:28:21,309 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:28:21,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:28:21,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1786143722, now seen corresponding path program 3 times [2021-11-20 06:28:21,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:28:21,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936448793] [2021-11-20 06:28:21,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:28:21,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:28:21,353 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:28:21,356 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1568133654] [2021-11-20 06:28:21,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 06:28:21,356 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:28:21,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:28:21,357 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:28:21,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 06:28:21,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-20 06:28:21,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:28:21,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-20 06:28:21,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:28:21,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:28:21,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2021-11-20 06:28:21,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:21,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,688 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-20 06:28:21,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-11-20 06:28:21,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:21,794 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 61 [2021-11-20 06:28:21,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:21,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 61 [2021-11-20 06:28:21,874 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:21,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 45 [2021-11-20 06:28:21,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:21,976 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:28:21,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-11-20 06:28:22,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,194 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,196 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,239 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-20 06:28:22,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 30 case distinctions, treesize of input 262 treesize of output 508 [2021-11-20 06:28:22,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,378 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,380 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,389 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 200 treesize of output 120 [2021-11-20 06:28:22,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,450 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,462 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,468 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 199 treesize of output 118 [2021-11-20 06:28:22,482 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,486 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,489 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,491 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,493 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,495 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,502 INFO L354 Elim1Store]: treesize reduction 27, result has 3.6 percent of original size [2021-11-20 06:28:22,502 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 254 treesize of output 141 [2021-11-20 06:28:22,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,720 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,742 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:22,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:22,782 INFO L354 Elim1Store]: treesize reduction 90, result has 14.3 percent of original size [2021-11-20 06:28:22,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 38 case distinctions, treesize of input 263 treesize of output 519 [2021-11-20 06:28:23,031 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:28:23,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,129 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:23,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 13 disjoint index pairs (out of 36 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 304 treesize of output 186 [2021-11-20 06:28:23,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,175 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 13 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 204 treesize of output 97 [2021-11-20 06:28:23,239 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:23,240 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,242 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,244 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:23,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:28:23,260 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:23,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:28:23,272 INFO L354 Elim1Store]: treesize reduction 33, result has 8.3 percent of original size [2021-11-20 06:28:23,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 13 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 35 case distinctions, treesize of input 240 treesize of output 131 [2021-11-20 06:28:23,585 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 06:28:23,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 92 treesize of output 48 [2021-11-20 06:28:23,613 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:23,613 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:28:31,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:28:31,992 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:28:31,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936448793] [2021-11-20 06:28:31,992 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:28:31,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568133654] [2021-11-20 06:28:31,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568133654] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:28:31,992 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:28:31,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2021-11-20 06:28:31,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692848680] [2021-11-20 06:28:31,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:28:31,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-20 06:28:31,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:28:31,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-20 06:28:31,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=438, Unknown=0, NotChecked=0, Total=600 [2021-11-20 06:28:31,995 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:29:03,489 WARN L227 SmtUtils]: Spent 28.04s on a formula simplification that was a NOOP. DAG size: 243 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:30:53,904 WARN L227 SmtUtils]: Spent 1.57m on a formula simplification. DAG size of input: 248 DAG size of output: 244 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:30:56,922 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 06:30:58,947 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 06:31:00,712 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=true, quantifiers [] [2021-11-20 06:31:10,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:31:10,649 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2021-11-20 06:31:10,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 06:31:10,650 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-20 06:31:10,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:31:10,651 INFO L225 Difference]: With dead ends: 80 [2021-11-20 06:31:10,651 INFO L226 Difference]: Without dead ends: 71 [2021-11-20 06:31:10,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 151.6s TimeCoverageRelationStatistics Valid=484, Invalid=1408, Unknown=0, NotChecked=0, Total=1892 [2021-11-20 06:31:10,653 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 41 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 64 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 51 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:31:10,653 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 130 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 234 Invalid, 2 Unknown, 51 Unchecked, 13.2s Time] [2021-11-20 06:31:10,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-20 06:31:10,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2021-11-20 06:31:10,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.2) internal successors, (60), 50 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:10,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 60 transitions. [2021-11-20 06:31:10,662 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 60 transitions. Word has length 20 [2021-11-20 06:31:10,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:31:10,663 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 60 transitions. [2021-11-20 06:31:10,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.36) internal successors, (34), 25 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 60 transitions. [2021-11-20 06:31:10,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:31:10,664 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:31:10,664 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:31:10,687 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 06:31:10,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:10,874 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:31:10,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:31:10,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1197174726, now seen corresponding path program 1 times [2021-11-20 06:31:10,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:31:10,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738927820] [2021-11-20 06:31:10,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:10,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:31:10,902 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:31:10,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1396561990] [2021-11-20 06:31:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:10,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:10,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:31:10,929 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:31:10,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 06:31:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 06:31:10,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-20 06:31:10,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:31:11,122 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:31:11,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:31:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 06:31:11,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:31:11,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738927820] [2021-11-20 06:31:11,207 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:31:11,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396561990] [2021-11-20 06:31:11,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1396561990] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:31:11,207 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:31:11,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-11-20 06:31:11,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806648767] [2021-11-20 06:31:11,208 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:31:11,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 06:31:11,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:31:11,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 06:31:11,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-20 06:31:11,209 INFO L87 Difference]: Start difference. First operand 51 states and 60 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:31:11,385 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2021-11-20 06:31:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-20 06:31:11,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 06:31:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:31:11,387 INFO L225 Difference]: With dead ends: 94 [2021-11-20 06:31:11,387 INFO L226 Difference]: Without dead ends: 74 [2021-11-20 06:31:11,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-11-20 06:31:11,388 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 48 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 06:31:11,388 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 64 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 06:31:11,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-20 06:31:11,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2021-11-20 06:31:11,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 55 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:11,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 67 transitions. [2021-11-20 06:31:11,398 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 67 transitions. Word has length 24 [2021-11-20 06:31:11,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:31:11,398 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 67 transitions. [2021-11-20 06:31:11,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:31:11,398 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 67 transitions. [2021-11-20 06:31:11,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:31:11,400 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:31:11,400 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:31:11,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 06:31:11,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:11,625 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:31:11,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:31:11,626 INFO L85 PathProgramCache]: Analyzing trace with hash 1232945932, now seen corresponding path program 2 times [2021-11-20 06:31:11,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:31:11,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056564975] [2021-11-20 06:31:11,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:31:11,626 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:31:11,666 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:31:11,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [7104362] [2021-11-20 06:31:11,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 06:31:11,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:31:11,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:31:11,676 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:31:11,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 06:31:11,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 06:31:11,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:31:11,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 06:31:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:31:12,002 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 06:31:12,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-20 06:31:12,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:31:12,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,088 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,097 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-20 06:31:12,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-11-20 06:31:12,177 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 61 [2021-11-20 06:31:12,201 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:31:12,227 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,231 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 138 treesize of output 72 [2021-11-20 06:31:12,246 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,252 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:31:12,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 139 treesize of output 69 [2021-11-20 06:31:12,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,356 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:31:12,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 46 [2021-11-20 06:31:12,536 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,538 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,539 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,550 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,556 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,605 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-20 06:31:12,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 8 select indices, 8 select index equivalence classes, 10 disjoint index pairs (out of 28 index pairs), introduced 12 new quantified variables, introduced 30 case distinctions, treesize of input 266 treesize of output 510 [2021-11-20 06:31:12,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,673 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,675 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 0 case distinctions, treesize of input 266 treesize of output 167 [2021-11-20 06:31:12,766 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:31:12,831 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,838 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,846 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,849 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,857 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 06:31:12,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 9 disjoint index pairs (out of 36 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 268 treesize of output 172 [2021-11-20 06:31:12,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,942 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,943 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,944 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,948 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,952 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,954 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:12,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:12,969 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-11-20 06:31:12,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 10 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 270 treesize of output 153 [2021-11-20 06:31:13,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:13,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:13,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:13,093 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:13,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:31:13,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:31:13,125 INFO L354 Elim1Store]: treesize reduction 35, result has 16.7 percent of original size [2021-11-20 06:31:13,125 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 11 case distinctions, treesize of input 81 treesize of output 68 [2021-11-20 06:31:13,523 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-20 06:31:13,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 102 treesize of output 50 [2021-11-20 06:31:13,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:31:13,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:31:56,382 WARN L227 SmtUtils]: Spent 17.95s on a formula simplification that was a NOOP. DAG size: 147 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:31:56,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:31:56,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:31:56,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056564975] [2021-11-20 06:31:56,395 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:31:56,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7104362] [2021-11-20 06:31:56,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7104362] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:31:56,396 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:31:56,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-11-20 06:31:56,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485480856] [2021-11-20 06:31:56,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:31:56,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-20 06:31:56,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:31:56,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-20 06:31:56,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-11-20 06:31:56,398 INFO L87 Difference]: Start difference. First operand 56 states and 67 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:32:13,810 WARN L227 SmtUtils]: Spent 13.57s on a formula simplification. DAG size of input: 290 DAG size of output: 90 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:32:51,766 WARN L227 SmtUtils]: Spent 31.68s on a formula simplification. DAG size of input: 340 DAG size of output: 127 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:33:33,190 WARN L227 SmtUtils]: Spent 32.25s on a formula simplification. DAG size of input: 323 DAG size of output: 109 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:33:40,869 WARN L227 SmtUtils]: Spent 5.02s on a formula simplification. DAG size of input: 134 DAG size of output: 67 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:33:54,020 WARN L227 SmtUtils]: Spent 7.20s on a formula simplification. DAG size of input: 128 DAG size of output: 72 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:34:45,476 WARN L227 SmtUtils]: Spent 42.28s on a formula simplification. DAG size of input: 327 DAG size of output: 111 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:34:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 06:34:54,115 INFO L93 Difference]: Finished difference Result 133 states and 150 transitions. [2021-11-20 06:34:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-20 06:34:54,116 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-20 06:34:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 06:34:54,117 INFO L225 Difference]: With dead ends: 133 [2021-11-20 06:34:54,117 INFO L226 Difference]: Without dead ends: 124 [2021-11-20 06:34:54,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 9 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 202.9s TimeCoverageRelationStatistics Valid=370, Invalid=1352, Unknown=0, NotChecked=0, Total=1722 [2021-11-20 06:34:54,119 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 169 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2021-11-20 06:34:54,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 197 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 269 Invalid, 0 Unknown, 46 Unchecked, 10.2s Time] [2021-11-20 06:34:54,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-20 06:34:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 71. [2021-11-20 06:34:54,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 70 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 85 transitions. [2021-11-20 06:34:54,133 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 85 transitions. Word has length 24 [2021-11-20 06:34:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 06:34:54,134 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 85 transitions. [2021-11-20 06:34:54,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-20 06:34:54,134 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 85 transitions. [2021-11-20 06:34:54,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-20 06:34:54,135 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 06:34:54,135 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 06:34:54,156 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-20 06:34:54,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:54,336 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 06:34:54,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 06:34:54,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1049585326, now seen corresponding path program 4 times [2021-11-20 06:34:54,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 06:34:54,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131686887] [2021-11-20 06:34:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 06:34:54,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 06:34:54,372 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-20 06:34:54,372 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1146135428] [2021-11-20 06:34:54,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 06:34:54,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 06:34:54,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 06:34:54,386 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 06:34:54,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e7dd8581-afbd-4e18-9355-d595fc2d8ebc/bin/uautomizer-DQz5hQGWxF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-20 06:34:54,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 06:34:54,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 06:34:54,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-20 06:34:54,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 06:34:54,966 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 06:34:54,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 19 [2021-11-20 06:34:54,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-20 06:34:55,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,029 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,032 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,034 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,035 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,044 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-20 06:34:55,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 8 new quantified variables, introduced 6 case distinctions, treesize of input 186 treesize of output 304 [2021-11-20 06:34:55,099 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-20 06:34:55,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,271 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:34:55,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 135 treesize of output 79 [2021-11-20 06:34:55,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,296 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:34:55,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 152 treesize of output 76 [2021-11-20 06:34:55,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,312 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,318 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:34:55,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 41 [2021-11-20 06:34:55,402 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,408 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,409 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,417 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-20 06:34:55,417 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 5 select indices, 5 select index equivalence classes, 9 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 201 treesize of output 345 [2021-11-20 06:34:55,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,525 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,527 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 118 treesize of output 68 [2021-11-20 06:34:55,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,560 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,561 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,562 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,563 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 119 treesize of output 69 [2021-11-20 06:34:55,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 54 [2021-11-20 06:34:55,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,751 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-20 06:34:55,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 68 treesize of output 60 [2021-11-20 06:34:55,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,965 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,967 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,972 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,973 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,975 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,976 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,977 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,979 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,981 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,982 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:55,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:55,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,016 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-20 06:34:56,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 9 select indices, 9 select index equivalence classes, 15 disjoint index pairs (out of 36 index pairs), introduced 13 new quantified variables, introduced 38 case distinctions, treesize of input 287 treesize of output 551 [2021-11-20 06:34:56,092 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,093 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,101 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,102 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,105 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,109 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 14 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 326 treesize of output 188 [2021-11-20 06:34:56,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,332 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,335 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,336 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 14 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 0 case distinctions, treesize of input 297 treesize of output 166 [2021-11-20 06:34:56,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,438 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,439 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,440 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,451 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,467 INFO L354 Elim1Store]: treesize reduction 25, result has 10.7 percent of original size [2021-11-20 06:34:56,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 16 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 26 case distinctions, treesize of input 235 treesize of output 134 [2021-11-20 06:34:56,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,744 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,747 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,753 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,754 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,766 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,768 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,771 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,772 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,772 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,857 INFO L354 Elim1Store]: treesize reduction 86, result has 18.1 percent of original size [2021-11-20 06:34:56,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 4 stores, 10 select indices, 10 select index equivalence classes, 15 disjoint index pairs (out of 45 index pairs), introduced 14 new quantified variables, introduced 47 case distinctions, treesize of input 320 treesize of output 644 [2021-11-20 06:34:56,978 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,980 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:56,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:56,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,003 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:57,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,007 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,010 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 11 select indices, 11 select index equivalence classes, 17 disjoint index pairs (out of 55 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 511 treesize of output 329 [2021-11-20 06:34:57,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,140 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,148 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:57,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 10 select indices, 10 select index equivalence classes, 17 disjoint index pairs (out of 45 index pairs), introduced 9 new quantified variables, introduced 0 case distinctions, treesize of input 307 treesize of output 182 [2021-11-20 06:34:57,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,275 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,280 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,287 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,295 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:57,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,299 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:57,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,303 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:57,310 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-11-20 06:34:57,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 9 select indices, 9 select index equivalence classes, 17 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 326 treesize of output 184 [2021-11-20 06:34:57,539 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:57,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,544 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:57,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 06:34:57,546 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 06:34:57,555 INFO L354 Elim1Store]: treesize reduction 43, result has 14.0 percent of original size [2021-11-20 06:34:57,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 6 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 22 case distinctions, treesize of input 110 treesize of output 93 [2021-11-20 06:34:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:34:57,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 06:35:38,372 WARN L227 SmtUtils]: Spent 7.13s on a formula simplification that was a NOOP. DAG size: 89 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:36:22,072 WARN L227 SmtUtils]: Spent 22.88s on a formula simplification that was a NOOP. DAG size: 122 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 06:36:22,083 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 06:36:22,083 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-20 06:36:22,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131686887] [2021-11-20 06:36:22,084 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-20 06:36:22,084 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146135428] [2021-11-20 06:36:22,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146135428] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 06:36:22,084 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 06:36:22,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 28 [2021-11-20 06:36:22,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115829757] [2021-11-20 06:36:22,084 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 06:36:22,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-20 06:36:22,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-20 06:36:22,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-20 06:36:22,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=560, Unknown=1, NotChecked=0, Total=756 [2021-11-20 06:36:22,086 INFO L87 Difference]: Start difference. First operand 71 states and 85 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 28 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)