./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/heap-data/min_max.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/config/AutomizerReach.xml -i ../../sv-benchmarks/c/heap-data/min_max.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX --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 6f3dc8ca7e9d6160ebf6e1f17d4641cf9f9e9c7a0130658f0fd8bbb7edc9643d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 09:18:55,800 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 09:18:55,803 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 09:18:55,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 09:18:55,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 09:18:55,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 09:18:55,852 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 09:18:55,855 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 09:18:55,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 09:18:55,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 09:18:55,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 09:18:55,862 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 09:18:55,863 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 09:18:55,865 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 09:18:55,867 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 09:18:55,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 09:18:55,870 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 09:18:55,871 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 09:18:55,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 09:18:55,877 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 09:18:55,879 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 09:18:55,881 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 09:18:55,883 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 09:18:55,884 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 09:18:55,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 09:18:55,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 09:18:55,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 09:18:55,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 09:18:55,892 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 09:18:55,893 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 09:18:55,894 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 09:18:55,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 09:18:55,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 09:18:55,905 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 09:18:55,906 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 09:18:55,907 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 09:18:55,907 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 09:18:55,908 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 09:18:55,908 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 09:18:55,909 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 09:18:55,910 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 09:18:55,914 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-09 09:18:55,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 09:18:55,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 09:18:55,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 09:18:55,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 09:18:55,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 09:18:55,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 09:18:55,954 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 09:18:55,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 09:18:55,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 09:18:55,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 09:18:55,956 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 09:18:55,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 09:18:55,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-09 09:18:55,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 09:18:55,957 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-09 09:18:55,957 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 09:18:55,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-09 09:18:55,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 09:18:55,958 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-09 09:18:55,958 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 09:18:55,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 09:18:55,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 09:18:55,959 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:55,959 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 09:18:55,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 09:18:55,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-09 09:18:55,960 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 09:18:55,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 09:18:55,960 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-09 09:18:55,962 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-09 09:18:55,962 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-09 09:18:55,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 09:18:55,963 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_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6f3dc8ca7e9d6160ebf6e1f17d4641cf9f9e9c7a0130658f0fd8bbb7edc9643d [2021-11-09 09:18:56,221 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 09:18:56,244 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 09:18:56,247 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 09:18:56,248 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 09:18:56,249 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 09:18:56,250 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/heap-data/min_max.i [2021-11-09 09:18:56,345 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/data/1a9901714/83554dd5bc1d431ea1484b2f1d7d8dfd/FLAGd4485b529 [2021-11-09 09:18:56,845 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 09:18:56,845 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/sv-benchmarks/c/heap-data/min_max.i [2021-11-09 09:18:56,870 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/data/1a9901714/83554dd5bc1d431ea1484b2f1d7d8dfd/FLAGd4485b529 [2021-11-09 09:18:57,187 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/data/1a9901714/83554dd5bc1d431ea1484b2f1d7d8dfd [2021-11-09 09:18:57,190 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 09:18:57,191 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-09 09:18:57,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:57,193 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 09:18:57,197 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 09:18:57,197 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,199 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7406b1ff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57, skipping insertion in model container [2021-11-09 09:18:57,199 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 09:18:57,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 09:18:57,586 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/sv-benchmarks/c/heap-data/min_max.i[23535,23548] [2021-11-09 09:18:57,593 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/sv-benchmarks/c/heap-data/min_max.i[23590,23603] [2021-11-09 09:18:57,595 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:57,606 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 09:18:57,673 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/sv-benchmarks/c/heap-data/min_max.i[23535,23548] [2021-11-09 09:18:57,688 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/sv-benchmarks/c/heap-data/min_max.i[23590,23603] [2021-11-09 09:18:57,689 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 09:18:57,722 INFO L208 MainTranslator]: Completed translation [2021-11-09 09:18:57,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57 WrapperNode [2021-11-09 09:18:57,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 09:18:57,725 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-09 09:18:57,725 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-09 09:18:57,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-09 09:18:57,733 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,793 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-09 09:18:57,794 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 09:18:57,794 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 09:18:57,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 09:18:57,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,818 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,826 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,839 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,843 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,845 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 09:18:57,846 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 09:18:57,846 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 09:18:57,846 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 09:18:57,847 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (1/1) ... [2021-11-09 09:18:57,855 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 09:18:57,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:18:57,894 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 09:18:57,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 09:18:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 09:18:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 09:18:57,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 09:18:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 09:18:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 09:18:57,947 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 09:18:57,948 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 09:18:57,949 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 09:18:57,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 09:18:58,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 09:18:58,297 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-11-09 09:18:58,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:18:58 BoogieIcfgContainer [2021-11-09 09:18:58,300 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 09:18:58,302 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 09:18:58,302 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 09:18:58,306 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 09:18:58,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 09:18:57" (1/3) ... [2021-11-09 09:18:58,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725ee341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:18:58, skipping insertion in model container [2021-11-09 09:18:58,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 09:18:57" (2/3) ... [2021-11-09 09:18:58,308 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@725ee341 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 09:18:58, skipping insertion in model container [2021-11-09 09:18:58,308 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 09:18:58" (3/3) ... [2021-11-09 09:18:58,310 INFO L111 eAbstractionObserver]: Analyzing ICFG min_max.i [2021-11-09 09:18:58,315 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 09:18:58,316 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-09 09:18:58,366 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 09:18:58,371 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 [2021-11-09 09:18:58,372 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-09 09:18:58,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 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) [2021-11-09 09:18:58,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-09 09:18:58,392 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:58,392 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:58,393 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:58,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:58,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1825905474, now seen corresponding path program 1 times [2021-11-09 09:18:58,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:58,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255463213] [2021-11-09 09:18:58,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:58,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:58,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:58,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:58,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:58,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255463213] [2021-11-09 09:18:58,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255463213] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:58,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:58,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-09 09:18:58,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897739939] [2021-11-09 09:18:58,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-09 09:18:58,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:58,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-09 09:18:58,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-09 09:18:58,578 INFO L87 Difference]: Start difference. First operand has 20 states, 17 states have (on average 1.588235294117647) internal successors, (27), 19 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:58,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:58,591 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-11-09 09:18:58,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-09 09:18:58,592 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-11-09 09:18:58,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:58,598 INFO L225 Difference]: With dead ends: 33 [2021-11-09 09:18:58,598 INFO L226 Difference]: Without dead ends: 17 [2021-11-09 09:18:58,602 INFO L786 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 [2021-11-09 09:18:58,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-11-09 09:18:58,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-11-09 09:18:58,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2021-11-09 09:18:58,637 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 7 [2021-11-09 09:18:58,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:58,638 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2021-11-09 09:18:58,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:58,639 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2021-11-09 09:18:58,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-09 09:18:58,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:58,639 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:58,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 09:18:58,640 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:58,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:58,645 INFO L85 PathProgramCache]: Analyzing trace with hash 178093936, now seen corresponding path program 1 times [2021-11-09 09:18:58,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:58,646 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127545329] [2021-11-09 09:18:58,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:58,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:58,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:58,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127545329] [2021-11-09 09:18:58,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127545329] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:58,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:58,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 09:18:58,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035054581] [2021-11-09 09:18:58,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 09:18:58,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:58,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 09:18:58,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 09:18:58,781 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:58,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:58,828 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-09 09:18:58,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 09:18:58,829 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 8 [2021-11-09 09:18:58,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:58,830 INFO L225 Difference]: With dead ends: 30 [2021-11-09 09:18:58,830 INFO L226 Difference]: Without dead ends: 19 [2021-11-09 09:18:58,831 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-09 09:18:58,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-09 09:18:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-11-09 09:18:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-11-09 09:18:58,835 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 8 [2021-11-09 09:18:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:58,836 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-11-09 09:18:58,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-11-09 09:18:58,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-09 09:18:58,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:58,837 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:58,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 09:18:58,837 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:58,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:58,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1651856839, now seen corresponding path program 1 times [2021-11-09 09:18:58,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:58,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95888754] [2021-11-09 09:18:58,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:58,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:58,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:59,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:59,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95888754] [2021-11-09 09:18:59,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95888754] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:59,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:59,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 09:18:59,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33709318] [2021-11-09 09:18:59,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 09:18:59,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:59,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 09:18:59,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 09:18:59,048 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:59,154 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-11-09 09:18:59,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:59,155 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-09 09:18:59,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:59,156 INFO L225 Difference]: With dead ends: 28 [2021-11-09 09:18:59,156 INFO L226 Difference]: Without dead ends: 26 [2021-11-09 09:18:59,156 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:18:59,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-09 09:18:59,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2021-11-09 09:18:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 19 states have (on average 1.263157894736842) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-11-09 09:18:59,161 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 13 [2021-11-09 09:18:59,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:59,162 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-11-09 09:18:59,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-11-09 09:18:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:18:59,162 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:59,163 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:59,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 09:18:59,163 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:59,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:59,164 INFO L85 PathProgramCache]: Analyzing trace with hash 1703602811, now seen corresponding path program 1 times [2021-11-09 09:18:59,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:59,164 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447992897] [2021-11-09 09:18:59,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:59,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:59,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:59,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:59,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:59,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447992897] [2021-11-09 09:18:59,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447992897] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:59,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:59,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 09:18:59,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31691208] [2021-11-09 09:18:59,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 09:18:59,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:59,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 09:18:59,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:59,397 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:59,576 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-11-09 09:18:59,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:18:59,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 09:18:59,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:59,578 INFO L225 Difference]: With dead ends: 40 [2021-11-09 09:18:59,579 INFO L226 Difference]: Without dead ends: 38 [2021-11-09 09:18:59,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:18:59,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-09 09:18:59,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-11-09 09:18:59,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-09 09:18:59,597 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2021-11-09 09:18:59,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:59,597 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-09 09:18:59,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 8 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,599 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-09 09:18:59,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:18:59,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:59,600 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:59,601 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 09:18:59,601 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:59,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:59,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1911306115, now seen corresponding path program 1 times [2021-11-09 09:18:59,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:59,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340582117] [2021-11-09 09:18:59,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:59,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:59,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:59,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340582117] [2021-11-09 09:18:59,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340582117] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:59,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:59,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 09:18:59,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374775056] [2021-11-09 09:18:59,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 09:18:59,682 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:59,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 09:18:59,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-09 09:18:59,682 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:18:59,758 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2021-11-09 09:18:59,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:18:59,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 09:18:59,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:18:59,759 INFO L225 Difference]: With dead ends: 55 [2021-11-09 09:18:59,759 INFO L226 Difference]: Without dead ends: 31 [2021-11-09 09:18:59,760 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-11-09 09:18:59,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-09 09:18:59,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-09 09:18:59,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 30 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2021-11-09 09:18:59,764 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 15 [2021-11-09 09:18:59,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:18:59,765 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2021-11-09 09:18:59,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:18:59,765 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2021-11-09 09:18:59,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-09 09:18:59,766 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:18:59,766 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:18:59,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 09:18:59,766 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:18:59,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:18:59,767 INFO L85 PathProgramCache]: Analyzing trace with hash 1682596603, now seen corresponding path program 1 times [2021-11-09 09:18:59,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:18:59,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559621286] [2021-11-09 09:18:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:18:59,767 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:18:59,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:18:59,892 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:18:59,892 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:18:59,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559621286] [2021-11-09 09:18:59,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559621286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 09:18:59,893 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 09:18:59,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 09:18:59,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117807069] [2021-11-09 09:18:59,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:18:59,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:18:59,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:18:59,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:18:59,895 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:00,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:00,064 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2021-11-09 09:19:00,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:19:00,065 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-09 09:19:00,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:00,066 INFO L225 Difference]: With dead ends: 36 [2021-11-09 09:19:00,066 INFO L226 Difference]: Without dead ends: 34 [2021-11-09 09:19:00,066 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:19:00,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-09 09:19:00,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2021-11-09 09:19:00,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:00,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-09 09:19:00,071 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 15 [2021-11-09 09:19:00,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:00,071 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-09 09:19:00,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:00,071 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-09 09:19:00,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-09 09:19:00,072 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:00,072 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:00,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 09:19:00,073 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:00,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:00,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1593313461, now seen corresponding path program 1 times [2021-11-09 09:19:00,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:00,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871107095] [2021-11-09 09:19:00,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:00,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:00,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:00,230 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:00,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871107095] [2021-11-09 09:19:00,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871107095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:00,231 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293295942] [2021-11-09 09:19:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:00,231 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:00,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:00,238 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:00,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 09:19:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:00,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-09 09:19:00,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:00,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:00,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:00,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 21 [2021-11-09 09:19:00,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-09 09:19:00,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:00,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293295942] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:00,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:00,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-11-09 09:19:00,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452254415] [2021-11-09 09:19:00,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:19:00,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:00,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:19:00,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:19:00,614 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:00,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:00,756 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-11-09 09:19:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 09:19:00,756 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-09 09:19:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:00,757 INFO L225 Difference]: With dead ends: 46 [2021-11-09 09:19:00,757 INFO L226 Difference]: Without dead ends: 30 [2021-11-09 09:19:00,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:19:00,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-09 09:19:00,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-09 09:19:00,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 28 states have (on average 1.25) internal successors, (35), 29 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:00,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-11-09 09:19:00,762 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 18 [2021-11-09 09:19:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:00,762 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-11-09 09:19:00,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:00,763 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-11-09 09:19:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:19:00,763 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:00,764 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:00,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:00,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-09 09:19:00,989 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:00,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:00,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1667695916, now seen corresponding path program 2 times [2021-11-09 09:19:00,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:00,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72353655] [2021-11-09 09:19:00,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:00,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:01,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:01,137 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:19:01,138 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:01,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72353655] [2021-11-09 09:19:01,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72353655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:01,138 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481824920] [2021-11-09 09:19:01,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:01,139 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:01,139 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:01,140 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:01,171 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 09:19:01,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:01,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:01,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-09 09:19:01,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:01,392 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~p~0.base, ULTIMATE.start_main_~p~0.offset] [2021-11-09 09:19:01,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 09:19:01,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2021-11-09 09:19:01,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49281722] [2021-11-09 09:19:01,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:19:01,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:01,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:19:01,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-09 09:19:01,395 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:01,636 INFO L93 Difference]: Finished difference Result 107 states and 122 transitions. [2021-11-09 09:19:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:19:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 09:19:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:01,640 INFO L225 Difference]: With dead ends: 107 [2021-11-09 09:19:01,640 INFO L226 Difference]: Without dead ends: 88 [2021-11-09 09:19:01,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:19:01,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-09 09:19:01,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 37. [2021-11-09 09:19:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 35 states have (on average 1.2571428571428571) internal successors, (44), 36 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) [2021-11-09 09:19:01,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 44 transitions. [2021-11-09 09:19:01,659 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 44 transitions. Word has length 23 [2021-11-09 09:19:01,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:01,659 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 44 transitions. [2021-11-09 09:19:01,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:01,662 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 44 transitions. [2021-11-09 09:19:01,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:19:01,667 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:01,667 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:01,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:01,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:01,871 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:01,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:01,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1409530478, now seen corresponding path program 1 times [2021-11-09 09:19:01,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:01,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208410545] [2021-11-09 09:19:01,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:01,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:01,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:02,485 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:02,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:02,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208410545] [2021-11-09 09:19:02,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208410545] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:02,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097216442] [2021-11-09 09:19:02,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:02,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:02,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:02,487 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:02,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 09:19:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:02,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:19:02,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:02,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:02,784 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:02,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2021-11-09 09:19:02,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-09 09:19:02,801 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-09 09:19:02,801 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-09 09:19:02,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:03,076 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-09 09:19:03,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-09 09:19:03,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:19:03,133 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:03,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097216442] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:03,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:03,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 8] total 21 [2021-11-09 09:19:03,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072151386] [2021-11-09 09:19:03,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:19:03,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:03,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:19:03,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=370, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:19:03,140 INFO L87 Difference]: Start difference. First operand 37 states and 44 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:06,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:06,133 INFO L93 Difference]: Finished difference Result 212 states and 239 transitions. [2021-11-09 09:19:06,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 09:19:06,134 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 09:19:06,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:06,139 INFO L225 Difference]: With dead ends: 212 [2021-11-09 09:19:06,140 INFO L226 Difference]: Without dead ends: 210 [2021-11-09 09:19:06,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 660 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=543, Invalid=2537, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 09:19:06,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-09 09:19:06,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 75. [2021-11-09 09:19:06,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 73 states have (on average 1.3013698630136987) internal successors, (95), 74 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:06,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2021-11-09 09:19:06,169 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 23 [2021-11-09 09:19:06,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:06,170 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2021-11-09 09:19:06,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:06,171 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2021-11-09 09:19:06,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:19:06,178 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:06,179 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:06,213 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:06,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:06,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:06,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:06,393 INFO L85 PathProgramCache]: Analyzing trace with hash 1032365076, now seen corresponding path program 1 times [2021-11-09 09:19:06,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:06,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375560429] [2021-11-09 09:19:06,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:06,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:06,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:06,529 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:19:06,529 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:06,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375560429] [2021-11-09 09:19:06,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375560429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:06,529 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596355457] [2021-11-09 09:19:06,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:06,529 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:06,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:06,530 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:06,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 09:19:06,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:06,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-09 09:19:06,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:06,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:19:06,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-09 09:19:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:19:06,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596355457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:06,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:06,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-11-09 09:19:06,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560270398] [2021-11-09 09:19:06,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 09:19:06,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 09:19:06,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-09 09:19:06,750 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2021-11-09 09:19:06,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:06,923 INFO L93 Difference]: Finished difference Result 180 states and 221 transitions. [2021-11-09 09:19:06,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:19:06,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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 23 [2021-11-09 09:19:06,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:06,926 INFO L225 Difference]: With dead ends: 180 [2021-11-09 09:19:06,926 INFO L226 Difference]: Without dead ends: 139 [2021-11-09 09:19:06,927 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-09 09:19:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-09 09:19:06,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 87. [2021-11-09 09:19:06,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 86 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:06,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2021-11-09 09:19:06,942 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 23 [2021-11-09 09:19:06,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:06,942 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2021-11-09 09:19:06,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 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) [2021-11-09 09:19:06,943 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2021-11-09 09:19:06,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-09 09:19:06,944 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:06,944 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:06,982 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:07,172 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-09 09:19:07,172 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:07,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:07,173 INFO L85 PathProgramCache]: Analyzing trace with hash 1290530514, now seen corresponding path program 1 times [2021-11-09 09:19:07,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:07,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794938437] [2021-11-09 09:19:07,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:07,174 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:07,410 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:07,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:07,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794938437] [2021-11-09 09:19:07,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794938437] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:07,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574481061] [2021-11-09 09:19:07,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:07,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:07,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:07,416 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:07,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 09:19:07,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:07,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:19:07,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:07,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:07,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:07,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:07,696 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:07,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2021-11-09 09:19:07,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-09 09:19:07,710 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-09 09:19:07,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-09 09:19:07,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:08,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-11-09 09:19:08,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-11-09 09:19:08,072 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:19:08,103 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-09 09:19:08,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:08,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574481061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:08,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:08,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 17 [2021-11-09 09:19:08,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270473070] [2021-11-09 09:19:08,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-09 09:19:08,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:08,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-09 09:19:08,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2021-11-09 09:19:08,122 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:08,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:08,711 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2021-11-09 09:19:08,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 09:19:08,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-09 09:19:08,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:08,713 INFO L225 Difference]: With dead ends: 125 [2021-11-09 09:19:08,713 INFO L226 Difference]: Without dead ends: 123 [2021-11-09 09:19:08,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:19:08,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-11-09 09:19:08,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2021-11-09 09:19:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 86 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:08,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 112 transitions. [2021-11-09 09:19:08,730 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 112 transitions. Word has length 23 [2021-11-09 09:19:08,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:08,733 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 112 transitions. [2021-11-09 09:19:08,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:08,733 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 112 transitions. [2021-11-09 09:19:08,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:19:08,737 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:08,737 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:08,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:08,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:08,944 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:08,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:08,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1643965548, now seen corresponding path program 1 times [2021-11-09 09:19:08,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:08,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438059656] [2021-11-09 09:19:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:08,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:09,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:09,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438059656] [2021-11-09 09:19:09,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438059656] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:09,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146330800] [2021-11-09 09:19:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:09,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:09,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:09,150 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:09,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 09:19:09,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:09,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:19:09,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:09,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:09,459 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:09,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 39 [2021-11-09 09:19:09,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-09 09:19:09,470 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-09 09:19:09,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-09 09:19:09,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:09,737 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-09 09:19:09,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-09 09:19:09,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:19:09,788 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:09,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146330800] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:09,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:09,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2021-11-09 09:19:09,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097415002] [2021-11-09 09:19:09,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-09 09:19:09,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-09 09:19:09,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-11-09 09:19:09,794 INFO L87 Difference]: Start difference. First operand 87 states and 112 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-11-09 09:19:10,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:10,433 INFO L93 Difference]: Finished difference Result 171 states and 209 transitions. [2021-11-09 09:19:10,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:19:10,433 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) Word has length 25 [2021-11-09 09:19:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:10,434 INFO L225 Difference]: With dead ends: 171 [2021-11-09 09:19:10,434 INFO L226 Difference]: Without dead ends: 169 [2021-11-09 09:19:10,435 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:19:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-11-09 09:19:10,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 130. [2021-11-09 09:19:10,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 128 states have (on average 1.3203125) internal successors, (169), 129 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:10,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 169 transitions. [2021-11-09 09:19:10,461 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 169 transitions. Word has length 25 [2021-11-09 09:19:10,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:10,462 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 169 transitions. [2021-11-09 09:19:10,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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) [2021-11-09 09:19:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 169 transitions. [2021-11-09 09:19:10,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:19:10,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:10,463 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:10,501 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:10,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-09 09:19:10,676 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:10,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:10,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1055550124, now seen corresponding path program 1 times [2021-11-09 09:19:10,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:10,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442213108] [2021-11-09 09:19:10,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:10,677 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:10,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:10,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:10,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442213108] [2021-11-09 09:19:10,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442213108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:10,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72408026] [2021-11-09 09:19:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:10,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:10,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:10,896 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:10,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 09:19:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:11,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:19:11,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:11,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:11,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:11,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:11,240 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:11,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2021-11-09 09:19:11,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-09 09:19:11,252 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-09 09:19:11,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-09 09:19:11,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:11,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 36 [2021-11-09 09:19:11,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 25 [2021-11-09 09:19:12,311 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:19:12,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-09 09:19:12,333 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:12,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [72408026] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:12,333 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:12,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-11-09 09:19:12,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413493010] [2021-11-09 09:19:12,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:19:12,334 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:12,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:19:12,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=330, Unknown=1, NotChecked=0, Total=380 [2021-11-09 09:19:12,336 INFO L87 Difference]: Start difference. First operand 130 states and 169 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-11-09 09:19:13,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:13,139 INFO L93 Difference]: Finished difference Result 201 states and 242 transitions. [2021-11-09 09:19:13,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 09:19:13,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) Word has length 25 [2021-11-09 09:19:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:13,141 INFO L225 Difference]: With dead ends: 201 [2021-11-09 09:19:13,141 INFO L226 Difference]: Without dead ends: 199 [2021-11-09 09:19:13,142 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=161, Invalid=708, Unknown=1, NotChecked=0, Total=870 [2021-11-09 09:19:13,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-09 09:19:13,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 134. [2021-11-09 09:19:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 132 states have (on average 1.3257575757575757) internal successors, (175), 133 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 175 transitions. [2021-11-09 09:19:13,185 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 175 transitions. Word has length 25 [2021-11-09 09:19:13,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:13,186 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 175 transitions. [2021-11-09 09:19:13,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 20 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) [2021-11-09 09:19:13,186 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 175 transitions. [2021-11-09 09:19:13,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:19:13,188 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:13,188 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:13,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:13,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-09 09:19:13,404 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:13,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:13,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1550473430, now seen corresponding path program 1 times [2021-11-09 09:19:13,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:13,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170802197] [2021-11-09 09:19:13,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:13,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:13,625 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:13,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:13,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170802197] [2021-11-09 09:19:13,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170802197] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:13,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135867933] [2021-11-09 09:19:13,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:13,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:13,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:13,629 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:13,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 09:19:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:13,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-09 09:19:13,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:13,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:13,969 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:13,970 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:13,980 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:13,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 41 [2021-11-09 09:19:13,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2021-11-09 09:19:14,003 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-09 09:19:14,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-09 09:19:14,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:14,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 40 [2021-11-09 09:19:14,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 29 [2021-11-09 09:19:14,512 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:19:14,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-09 09:19:14,540 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:14,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135867933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:14,541 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:14,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2021-11-09 09:19:14,541 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938066015] [2021-11-09 09:19:14,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-09 09:19:14,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:14,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-09 09:19:14,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-11-09 09:19:14,543 INFO L87 Difference]: Start difference. First operand 134 states and 175 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:17,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:17,535 INFO L93 Difference]: Finished difference Result 329 states and 388 transitions. [2021-11-09 09:19:17,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 09:19:17,536 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-09 09:19:17,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:17,538 INFO L225 Difference]: With dead ends: 329 [2021-11-09 09:19:17,538 INFO L226 Difference]: Without dead ends: 327 [2021-11-09 09:19:17,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=538, Invalid=2884, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 09:19:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-11-09 09:19:17,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 142. [2021-11-09 09:19:17,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 140 states have (on average 1.3357142857142856) internal successors, (187), 141 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:17,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 187 transitions. [2021-11-09 09:19:17,557 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 187 transitions. Word has length 25 [2021-11-09 09:19:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:17,557 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 187 transitions. [2021-11-09 09:19:17,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:17,558 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 187 transitions. [2021-11-09 09:19:17,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-09 09:19:17,559 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:17,559 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:17,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:17,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-09 09:19:17,772 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:17,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:17,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1560424534, now seen corresponding path program 1 times [2021-11-09 09:19:17,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:17,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116675950] [2021-11-09 09:19:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:17,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:17,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:17,982 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:17,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:17,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116675950] [2021-11-09 09:19:17,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116675950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:17,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002017788] [2021-11-09 09:19:17,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:17,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:17,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:17,984 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:18,011 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 09:19:18,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:18,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-09 09:19:18,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:18,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:18,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-11-09 09:19:18,391 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:18,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-11-09 09:19:18,400 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-09 09:19:18,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-09 09:19:18,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:18,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-09 09:19:18,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-09 09:19:18,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:19:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:18,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002017788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:18,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:18,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 18 [2021-11-09 09:19:18,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974085409] [2021-11-09 09:19:18,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 09:19:18,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:18,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 09:19:18,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-11-09 09:19:18,696 INFO L87 Difference]: Start difference. First operand 142 states and 187 transitions. Second operand has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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) [2021-11-09 09:19:19,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:19,582 INFO L93 Difference]: Finished difference Result 176 states and 221 transitions. [2021-11-09 09:19:19,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:19:19,583 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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) Word has length 25 [2021-11-09 09:19:19,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:19,585 INFO L225 Difference]: With dead ends: 176 [2021-11-09 09:19:19,585 INFO L226 Difference]: Without dead ends: 174 [2021-11-09 09:19:19,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=880, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:19:19,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-09 09:19:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 92. [2021-11-09 09:19:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 90 states have (on average 1.3111111111111111) internal successors, (118), 91 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2021-11-09 09:19:19,600 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 25 [2021-11-09 09:19:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:19,600 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2021-11-09 09:19:19,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.5) internal successors, (45), 18 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) [2021-11-09 09:19:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2021-11-09 09:19:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:19:19,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:19,601 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:19,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:19,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-09 09:19:19,815 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:19,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:19,815 INFO L85 PathProgramCache]: Analyzing trace with hash 138316690, now seen corresponding path program 2 times [2021-11-09 09:19:19,815 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:19,815 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549001900] [2021-11-09 09:19:19,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:19,815 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:19,980 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:19,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:19,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549001900] [2021-11-09 09:19:19,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549001900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:19,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394926617] [2021-11-09 09:19:19,981 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:19,981 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:19,981 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:19,982 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:20,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 09:19:20,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:20,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:20,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-09 09:19:20,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:20,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:20,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:20,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:20,414 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:20,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 68 [2021-11-09 09:19:20,421 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 51 [2021-11-09 09:19:20,430 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:20,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 47 [2021-11-09 09:19:20,437 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-09 09:19:20,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 44 [2021-11-09 09:19:20,829 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-09 09:19:20,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 68 treesize of output 42 [2021-11-09 09:19:20,841 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 09:19:20,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 23 [2021-11-09 09:19:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:20,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394926617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:20,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:20,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 14 [2021-11-09 09:19:20,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602357192] [2021-11-09 09:19:20,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 09:19:20,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:20,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 09:19:20,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-11-09 09:19:20,854 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:21,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:21,194 INFO L93 Difference]: Finished difference Result 137 states and 174 transitions. [2021-11-09 09:19:21,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 09:19:21,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 09:19:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:21,196 INFO L225 Difference]: With dead ends: 137 [2021-11-09 09:19:21,196 INFO L226 Difference]: Without dead ends: 116 [2021-11-09 09:19:21,197 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:19:21,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-09 09:19:21,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-11-09 09:19:21,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 114 states have (on average 1.2894736842105263) internal successors, (147), 115 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:21,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 147 transitions. [2021-11-09 09:19:21,210 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 147 transitions. Word has length 28 [2021-11-09 09:19:21,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:21,210 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 147 transitions. [2021-11-09 09:19:21,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:21,211 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 147 transitions. [2021-11-09 09:19:21,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:19:21,211 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:21,212 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:21,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:21,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-09 09:19:21,437 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:21,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:21,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1246930711, now seen corresponding path program 1 times [2021-11-09 09:19:21,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:21,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656909870] [2021-11-09 09:19:21,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:21,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:21,541 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:19:21,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:21,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656909870] [2021-11-09 09:19:21,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656909870] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:21,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262737313] [2021-11-09 09:19:21,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:21,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:21,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:21,548 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:21,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 09:19:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:21,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-09 09:19:21,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:21,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:19:21,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-11-09 09:19:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-09 09:19:21,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262737313] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:21,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:21,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-11-09 09:19:21,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379799839] [2021-11-09 09:19:21,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 09:19:21,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:21,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 09:19:21,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-11-09 09:19:21,930 INFO L87 Difference]: Start difference. First operand 116 states and 147 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:22,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:22,072 INFO L93 Difference]: Finished difference Result 182 states and 222 transitions. [2021-11-09 09:19:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:19:22,074 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 09:19:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:22,075 INFO L225 Difference]: With dead ends: 182 [2021-11-09 09:19:22,075 INFO L226 Difference]: Without dead ends: 139 [2021-11-09 09:19:22,075 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:19:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-09 09:19:22,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 96. [2021-11-09 09:19:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 94 states have (on average 1.2446808510638299) internal successors, (117), 95 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:22,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 117 transitions. [2021-11-09 09:19:22,087 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 117 transitions. Word has length 28 [2021-11-09 09:19:22,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:22,088 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 117 transitions. [2021-11-09 09:19:22,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:22,088 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 117 transitions. [2021-11-09 09:19:22,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 09:19:22,089 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:22,089 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:22,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:22,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-09 09:19:22,300 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:22,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1459688683, now seen corresponding path program 2 times [2021-11-09 09:19:22,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:22,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107818020] [2021-11-09 09:19:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:22,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:22,496 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:19:22,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:22,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107818020] [2021-11-09 09:19:22,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107818020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:22,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028650430] [2021-11-09 09:19:22,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:22,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:22,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:22,498 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:22,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 09:19:22,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:22,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:22,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-09 09:19:22,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:22,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:22,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:22,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-11-09 09:19:22,904 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:22,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 36 [2021-11-09 09:19:22,912 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-11-09 09:19:22,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-09 09:19:23,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 29 [2021-11-09 09:19:23,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 18 [2021-11-09 09:19:23,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:19:23,183 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-09 09:19:23,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028650430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:23,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:23,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 15 [2021-11-09 09:19:23,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198682677] [2021-11-09 09:19:23,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 09:19:23,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:23,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 09:19:23,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-09 09:19:23,184 INFO L87 Difference]: Start difference. First operand 96 states and 117 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:23,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:23,673 INFO L93 Difference]: Finished difference Result 99 states and 119 transitions. [2021-11-09 09:19:23,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:19:23,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-09 09:19:23,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:23,674 INFO L225 Difference]: With dead ends: 99 [2021-11-09 09:19:23,674 INFO L226 Difference]: Without dead ends: 97 [2021-11-09 09:19:23,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:19:23,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-09 09:19:23,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 56. [2021-11-09 09:19:23,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 55 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:23,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2021-11-09 09:19:23,685 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 28 [2021-11-09 09:19:23,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:23,686 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2021-11-09 09:19:23,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:23,686 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2021-11-09 09:19:23,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 09:19:23,687 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:23,687 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:23,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:23,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:23,908 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:23,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:23,909 INFO L85 PathProgramCache]: Analyzing trace with hash -334041831, now seen corresponding path program 3 times [2021-11-09 09:19:23,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:23,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539989922] [2021-11-09 09:19:23,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:23,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:24,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:24,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539989922] [2021-11-09 09:19:24,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539989922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:24,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478009052] [2021-11-09 09:19:24,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:24,199 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:24,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:24,200 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:24,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 09:19:24,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:19:24,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:24,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-09 09:19:24,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:24,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:24,651 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:24,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-09 09:19:24,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:19:24,667 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:19:24,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:19:24,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:24,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 116 treesize of output 96 [2021-11-09 09:19:24,883 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:24,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 92 [2021-11-09 09:19:24,897 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:19:24,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 106 [2021-11-09 09:19:24,911 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 09:19:24,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 84 treesize of output 78 [2021-11-09 09:19:24,922 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:24,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 72 [2021-11-09 09:19:25,451 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-09 09:19:25,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 54 [2021-11-09 09:19:25,463 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 09:19:25,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2021-11-09 09:19:25,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:19:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:25,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478009052] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:25,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:25,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 20 [2021-11-09 09:19:25,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142240226] [2021-11-09 09:19:25,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 09:19:25,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 09:19:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=334, Unknown=0, NotChecked=0, Total=380 [2021-11-09 09:19:25,507 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:26,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:26,571 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2021-11-09 09:19:26,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 09:19:26,571 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-09 09:19:26,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:26,572 INFO L225 Difference]: With dead ends: 66 [2021-11-09 09:19:26,572 INFO L226 Difference]: Without dead ends: 64 [2021-11-09 09:19:26,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=215, Invalid=777, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:19:26,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-09 09:19:26,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2021-11-09 09:19:26,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 57 states have (on average 1.2105263157894737) internal successors, (69), 58 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:26,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2021-11-09 09:19:26,581 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 33 [2021-11-09 09:19:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:26,582 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2021-11-09 09:19:26,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:26,582 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2021-11-09 09:19:26,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:19:26,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:26,582 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:26,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:26,783 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:26,783 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:26,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:26,784 INFO L85 PathProgramCache]: Analyzing trace with hash 1108473179, now seen corresponding path program 2 times [2021-11-09 09:19:26,784 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:26,784 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956056306] [2021-11-09 09:19:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:26,784 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:27,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:27,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956056306] [2021-11-09 09:19:27,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956056306] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:27,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120071755] [2021-11-09 09:19:27,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:27,024 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:27,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:27,025 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:27,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 09:19:27,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:27,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:27,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 09:19:27,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:27,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:27,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:27,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-11-09 09:19:27,553 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:27,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2021-11-09 09:19:27,568 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:19:27,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:19:27,741 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:27,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 99 [2021-11-09 09:19:27,756 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:19:27,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 114 treesize of output 106 [2021-11-09 09:19:27,768 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 09:19:27,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 90 [2021-11-09 09:19:27,782 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:27,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 72 [2021-11-09 09:19:28,302 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-09 09:19:28,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 92 treesize of output 54 [2021-11-09 09:19:28,313 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 09:19:28,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 35 [2021-11-09 09:19:28,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:19:28,368 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:28,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120071755] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:28,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:28,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-11-09 09:19:28,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365083807] [2021-11-09 09:19:28,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 09:19:28,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:28,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 09:19:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-11-09 09:19:28,370 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:29,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:29,648 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2021-11-09 09:19:29,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:19:29,648 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:19:29,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:29,649 INFO L225 Difference]: With dead ends: 162 [2021-11-09 09:19:29,649 INFO L226 Difference]: Without dead ends: 160 [2021-11-09 09:19:29,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=221, Invalid=1261, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:19:29,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-09 09:19:29,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 106. [2021-11-09 09:19:29,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 104 states have (on average 1.2211538461538463) internal successors, (127), 105 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:29,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 127 transitions. [2021-11-09 09:19:29,667 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 127 transitions. Word has length 35 [2021-11-09 09:19:29,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:29,667 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 127 transitions. [2021-11-09 09:19:29,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0952380952380953) internal successors, (65), 21 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:29,667 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 127 transitions. [2021-11-09 09:19:29,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:19:29,668 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:29,668 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:29,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:29,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:29,876 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:29,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash -2065136743, now seen corresponding path program 2 times [2021-11-09 09:19:29,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:29,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672392694] [2021-11-09 09:19:29,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:29,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:30,282 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:30,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:30,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672392694] [2021-11-09 09:19:30,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672392694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:30,283 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844119387] [2021-11-09 09:19:30,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:30,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:30,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:30,287 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:30,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 09:19:30,725 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:30,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:30,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-09 09:19:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:30,754 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:30,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:30,884 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:30,891 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:30,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2021-11-09 09:19:30,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:19:30,907 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:19:30,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:19:30,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:31,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:31,205 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:31,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 114 [2021-11-09 09:19:31,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:31,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:31,237 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:19:31,238 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 3 case distinctions, treesize of input 123 treesize of output 110 [2021-11-09 09:19:31,252 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 09:19:31,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 97 [2021-11-09 09:19:31,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:31,270 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:31,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 74 treesize of output 77 [2021-11-09 09:19:32,000 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-09 09:19:32,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 64 [2021-11-09 09:19:32,011 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 09:19:32,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 45 [2021-11-09 09:19:32,153 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-09 09:19:32,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-11-09 09:19:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:32,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844119387] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:32,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:32,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 28 [2021-11-09 09:19:32,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285143884] [2021-11-09 09:19:32,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:19:32,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:32,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:19:32,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:19:32,177 INFO L87 Difference]: Start difference. First operand 106 states and 127 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:33,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:33,689 INFO L93 Difference]: Finished difference Result 234 states and 260 transitions. [2021-11-09 09:19:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 09:19:33,690 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:19:33,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:33,691 INFO L225 Difference]: With dead ends: 234 [2021-11-09 09:19:33,691 INFO L226 Difference]: Without dead ends: 232 [2021-11-09 09:19:33,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=267, Invalid=1373, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 09:19:33,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-09 09:19:33,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 115. [2021-11-09 09:19:33,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 113 states have (on average 1.238938053097345) internal successors, (140), 114 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:33,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2021-11-09 09:19:33,708 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 35 [2021-11-09 09:19:33,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:33,709 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2021-11-09 09:19:33,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:33,709 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2021-11-09 09:19:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:19:33,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:33,710 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:33,736 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:33,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:33,916 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:33,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:33,917 INFO L85 PathProgramCache]: Analyzing trace with hash 540886811, now seen corresponding path program 2 times [2021-11-09 09:19:33,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:33,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164324311] [2021-11-09 09:19:33,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:33,917 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:33,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:34,249 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:34,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:34,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164324311] [2021-11-09 09:19:34,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164324311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:34,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779363466] [2021-11-09 09:19:34,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:19:34,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:34,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:34,250 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:34,252 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 09:19:34,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:19:34,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:34,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:19:34,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:34,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:34,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:34,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:34,855 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:34,863 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:34,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2021-11-09 09:19:34,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:19:34,880 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:19:34,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:19:35,177 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-09 09:19:35,177 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 3 case distinctions, treesize of input 119 treesize of output 110 [2021-11-09 09:19:35,194 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:35,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 88 [2021-11-09 09:19:35,208 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 09:19:35,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 99 treesize of output 93 [2021-11-09 09:19:35,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 84 treesize of output 72 [2021-11-09 09:19:35,223 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:35,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 68 [2021-11-09 09:19:35,775 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-09 09:19:35,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 95 treesize of output 61 [2021-11-09 09:19:35,787 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 09:19:35,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 42 [2021-11-09 09:19:35,858 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:19:35,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-09 09:19:35,874 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:35,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779363466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:35,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:35,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 25 [2021-11-09 09:19:35,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438566954] [2021-11-09 09:19:35,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 09:19:35,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:35,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 09:19:35,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=528, Unknown=0, NotChecked=0, Total=600 [2021-11-09 09:19:35,877 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:37,899 INFO L93 Difference]: Finished difference Result 237 states and 263 transitions. [2021-11-09 09:19:37,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-09 09:19:37,899 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:19:37,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:37,901 INFO L225 Difference]: With dead ends: 237 [2021-11-09 09:19:37,901 INFO L226 Difference]: Without dead ends: 235 [2021-11-09 09:19:37,902 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=442, Invalid=1910, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 09:19:37,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-09 09:19:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 119. [2021-11-09 09:19:37,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 118 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:37,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2021-11-09 09:19:37,925 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 35 [2021-11-09 09:19:37,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:37,925 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2021-11-09 09:19:37,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 25 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:37,925 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2021-11-09 09:19:37,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:19:37,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:37,926 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:37,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:38,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-09 09:19:38,148 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:38,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:38,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2095817047, now seen corresponding path program 3 times [2021-11-09 09:19:38,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:38,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133350794] [2021-11-09 09:19:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:38,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:38,453 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:38,453 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:38,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133350794] [2021-11-09 09:19:38,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133350794] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:38,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923520450] [2021-11-09 09:19:38,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:19:38,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:38,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:38,455 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:38,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 09:19:38,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-09 09:19:38,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:38,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:19:38,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:38,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:39,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:39,122 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:39,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-09 09:19:39,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:19:39,147 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:19:39,149 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:19:39,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:39,339 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:39,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 107 [2021-11-09 09:19:39,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:39,346 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:39,358 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:19:39,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 112 [2021-11-09 09:19:39,377 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 09:19:39,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 100 treesize of output 94 [2021-11-09 09:19:39,386 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:39,395 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:39,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 74 [2021-11-09 09:19:40,033 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-09 09:19:40,033 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 61 [2021-11-09 09:19:40,045 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 09:19:40,045 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 42 [2021-11-09 09:19:40,119 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:19:40,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-09 09:19:40,139 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:40,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923520450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:40,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:40,140 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 24 [2021-11-09 09:19:40,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280601409] [2021-11-09 09:19:40,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:19:40,140 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:40,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:19:40,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=492, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:19:40,141 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:41,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:41,366 INFO L93 Difference]: Finished difference Result 231 states and 258 transitions. [2021-11-09 09:19:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 09:19:41,367 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:19:41,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:41,369 INFO L225 Difference]: With dead ends: 231 [2021-11-09 09:19:41,369 INFO L226 Difference]: Without dead ends: 229 [2021-11-09 09:19:41,370 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=203, Invalid=1129, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:19:41,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-09 09:19:41,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 121. [2021-11-09 09:19:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 119 states have (on average 1.2436974789915967) internal successors, (148), 120 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 148 transitions. [2021-11-09 09:19:41,393 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 148 transitions. Word has length 35 [2021-11-09 09:19:41,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:41,394 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 148 transitions. [2021-11-09 09:19:41,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7083333333333335) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:41,394 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 148 transitions. [2021-11-09 09:19:41,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:19:41,395 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:41,395 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:41,421 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:41,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 09:19:41,608 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:41,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:41,609 INFO L85 PathProgramCache]: Analyzing trace with hash -678933349, now seen corresponding path program 4 times [2021-11-09 09:19:41,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:41,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217225346] [2021-11-09 09:19:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:41,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:41,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:41,990 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:41,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:41,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217225346] [2021-11-09 09:19:41,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217225346] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:41,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635553745] [2021-11-09 09:19:41,991 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:19:41,991 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:41,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:41,993 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:41,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 09:19:42,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:19:42,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:42,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-09 09:19:42,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:42,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:43,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:43,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:43,020 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:43,029 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:43,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2021-11-09 09:19:43,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:19:43,052 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:19:43,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:19:43,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:43,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:43,350 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-09 09:19:43,350 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 3 case distinctions, treesize of input 129 treesize of output 120 [2021-11-09 09:19:43,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:43,369 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:43,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 94 [2021-11-09 09:19:43,380 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 09:19:43,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 97 [2021-11-09 09:19:43,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:43,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 88 treesize of output 72 [2021-11-09 09:19:43,398 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:43,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 69 treesize of output 68 [2021-11-09 09:19:44,060 INFO L354 Elim1Store]: treesize reduction 34, result has 8.1 percent of original size [2021-11-09 09:19:44,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 64 [2021-11-09 09:19:44,070 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 09:19:44,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 45 [2021-11-09 09:19:44,221 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-09 09:19:44,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-11-09 09:19:44,244 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:44,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635553745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:44,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:44,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2021-11-09 09:19:44,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868267326] [2021-11-09 09:19:44,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:19:44,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:44,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:19:44,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=784, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:19:44,247 INFO L87 Difference]: Start difference. First operand 121 states and 148 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:45,729 INFO L93 Difference]: Finished difference Result 237 states and 264 transitions. [2021-11-09 09:19:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-09 09:19:45,729 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:19:45,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:45,731 INFO L225 Difference]: With dead ends: 237 [2021-11-09 09:19:45,731 INFO L226 Difference]: Without dead ends: 235 [2021-11-09 09:19:45,732 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=328, Invalid=1834, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:19:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-09 09:19:45,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 119. [2021-11-09 09:19:45,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 117 states have (on average 1.2393162393162394) internal successors, (145), 118 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:45,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 145 transitions. [2021-11-09 09:19:45,755 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 145 transitions. Word has length 35 [2021-11-09 09:19:45,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:45,755 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 145 transitions. [2021-11-09 09:19:45,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:45,756 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 145 transitions. [2021-11-09 09:19:45,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:19:45,756 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:45,757 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:45,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:45,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:45,976 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:45,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:45,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1927090205, now seen corresponding path program 5 times [2021-11-09 09:19:45,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:45,977 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121622095] [2021-11-09 09:19:45,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:45,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:46,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:46,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:46,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121622095] [2021-11-09 09:19:46,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121622095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:46,295 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253897033] [2021-11-09 09:19:46,295 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:19:46,295 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:46,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:46,296 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:46,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 09:19:46,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-09 09:19:46,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:46,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-09 09:19:46,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:46,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:47,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:47,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2021-11-09 09:19:47,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:47,101 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:47,109 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:47,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 44 [2021-11-09 09:19:47,126 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:19:47,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:19:47,396 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:47,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 115 treesize of output 110 [2021-11-09 09:19:47,416 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:19:47,417 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 3 case distinctions, treesize of input 133 treesize of output 120 [2021-11-09 09:19:47,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 103 [2021-11-09 09:19:47,435 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:47,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 99 [2021-11-09 09:19:47,444 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 09:19:47,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 90 [2021-11-09 09:19:48,005 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-09 09:19:48,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 65 [2021-11-09 09:19:48,015 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 09:19:48,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 46 [2021-11-09 09:19:48,096 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:19:48,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-09 09:19:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:48,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253897033] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:48,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:48,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 12] total 27 [2021-11-09 09:19:48,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900073402] [2021-11-09 09:19:48,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-09 09:19:48,123 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:48,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-09 09:19:48,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=636, Unknown=0, NotChecked=0, Total=702 [2021-11-09 09:19:48,124 INFO L87 Difference]: Start difference. First operand 119 states and 145 transitions. Second operand has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:56,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:19:56,987 INFO L93 Difference]: Finished difference Result 648 states and 720 transitions. [2021-11-09 09:19:56,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-09 09:19:56,987 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:19:56,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:19:56,991 INFO L225 Difference]: With dead ends: 648 [2021-11-09 09:19:56,991 INFO L226 Difference]: Without dead ends: 646 [2021-11-09 09:19:56,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3663 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1738, Invalid=11372, Unknown=0, NotChecked=0, Total=13110 [2021-11-09 09:19:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-09 09:19:57,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 142. [2021-11-09 09:19:57,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 140 states have (on average 1.2571428571428571) internal successors, (176), 141 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:57,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 176 transitions. [2021-11-09 09:19:57,027 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 176 transitions. Word has length 35 [2021-11-09 09:19:57,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:19:57,027 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 176 transitions. [2021-11-09 09:19:57,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4444444444444446) internal successors, (66), 27 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:19:57,027 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 176 transitions. [2021-11-09 09:19:57,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:19:57,028 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:19:57,028 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:19:57,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 09:19:57,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 09:19:57,236 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:19:57,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:19:57,237 INFO L85 PathProgramCache]: Analyzing trace with hash -874986469, now seen corresponding path program 6 times [2021-11-09 09:19:57,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:19:57,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946222004] [2021-11-09 09:19:57,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:19:57,237 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:19:57,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:19:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:57,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:19:57,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946222004] [2021-11-09 09:19:57,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946222004] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:57,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683914476] [2021-11-09 09:19:57,482 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:19:57,482 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:19:57,482 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:19:57,483 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:19:57,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 09:19:58,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-09 09:19:58,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:19:58,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-09 09:19:58,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:19:58,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:19:58,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-11-09 09:19:58,319 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:58,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2021-11-09 09:19:58,336 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:19:58,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:19:58,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:19:58,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:58,533 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:19:58,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 107 [2021-11-09 09:19:58,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:58,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:19:58,547 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:19:58,548 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 112 [2021-11-09 09:19:58,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:19:58,560 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:19:58,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 89 [2021-11-09 09:19:58,584 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 09:19:58,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 77 treesize of output 71 [2021-11-09 09:19:59,400 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-09 09:19:59,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 61 [2021-11-09 09:19:59,412 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 09:19:59,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 42 [2021-11-09 09:19:59,479 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:19:59,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-09 09:19:59,497 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:19:59,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683914476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:19:59,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:19:59,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 26 [2021-11-09 09:19:59,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579260763] [2021-11-09 09:19:59,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-09 09:19:59,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:19:59,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-09 09:19:59,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:19:59,499 INFO L87 Difference]: Start difference. First operand 142 states and 176 transitions. Second operand has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:01,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:01,022 INFO L93 Difference]: Finished difference Result 243 states and 282 transitions. [2021-11-09 09:20:01,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-09 09:20:01,023 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:20:01,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:01,024 INFO L225 Difference]: With dead ends: 243 [2021-11-09 09:20:01,024 INFO L226 Difference]: Without dead ends: 241 [2021-11-09 09:20:01,025 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=304, Invalid=1502, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 09:20:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-09 09:20:01,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 140. [2021-11-09 09:20:01,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 138 states have (on average 1.2536231884057971) internal successors, (173), 139 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:01,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 173 transitions. [2021-11-09 09:20:01,060 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 173 transitions. Word has length 35 [2021-11-09 09:20:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:01,060 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 173 transitions. [2021-11-09 09:20:01,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.5) internal successors, (65), 26 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:01,060 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 173 transitions. [2021-11-09 09:20:01,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-09 09:20:01,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:01,061 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:01,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:01,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:01,276 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:20:01,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:01,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1731037085, now seen corresponding path program 1 times [2021-11-09 09:20:01,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:01,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600038402] [2021-11-09 09:20:01,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:01,277 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:01,548 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:01,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600038402] [2021-11-09 09:20:01,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600038402] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:01,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158660739] [2021-11-09 09:20:01,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:01,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:01,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:01,549 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:01,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 09:20:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:02,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-09 09:20:02,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:02,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:20:02,468 INFO L354 Elim1Store]: treesize reduction 73, result has 11.0 percent of original size [2021-11-09 09:20:02,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 58 [2021-11-09 09:20:02,483 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:20:02,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 52 [2021-11-09 09:20:02,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-09 09:20:02,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-09 09:20:02,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 115 treesize of output 95 [2021-11-09 09:20:02,625 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:20:02,625 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 91 [2021-11-09 09:20:02,647 INFO L354 Elim1Store]: treesize reduction 185, result has 11.9 percent of original size [2021-11-09 09:20:02,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 113 treesize of output 105 [2021-11-09 09:20:02,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 95 treesize of output 83 [2021-11-09 09:20:02,673 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:20:02,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 80 treesize of output 79 [2021-11-09 09:20:02,684 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 09:20:02,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 70 [2021-11-09 09:20:03,186 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-09 09:20:03,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 53 [2021-11-09 09:20:03,199 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-11-09 09:20:03,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 34 [2021-11-09 09:20:03,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-11-09 09:20:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:03,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158660739] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:03,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:03,223 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 19 [2021-11-09 09:20:03,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735036460] [2021-11-09 09:20:03,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:20:03,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:03,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:20:03,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:20:03,225 INFO L87 Difference]: Start difference. First operand 140 states and 173 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:05,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:05,360 INFO L93 Difference]: Finished difference Result 197 states and 232 transitions. [2021-11-09 09:20:05,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 09:20:05,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-09 09:20:05,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:05,361 INFO L225 Difference]: With dead ends: 197 [2021-11-09 09:20:05,361 INFO L226 Difference]: Without dead ends: 195 [2021-11-09 09:20:05,362 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=470, Invalid=1692, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 09:20:05,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-09 09:20:05,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 61. [2021-11-09 09:20:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 60 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:05,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-11-09 09:20:05,375 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 35 [2021-11-09 09:20:05,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:05,376 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-11-09 09:20:05,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-11-09 09:20:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 09:20:05,377 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:05,377 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:05,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:05,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 09:20:05,592 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:20:05,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:05,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1475182485, now seen corresponding path program 4 times [2021-11-09 09:20:05,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:05,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480581974] [2021-11-09 09:20:05,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:05,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:05,902 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:05,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:05,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480581974] [2021-11-09 09:20:05,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480581974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:05,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242560029] [2021-11-09 09:20:05,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:20:05,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:05,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:05,904 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:05,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 09:20:06,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:20:06,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:06,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-09 09:20:06,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:06,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:20:06,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:20:06,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:20:07,082 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:20:07,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 74 [2021-11-09 09:20:07,096 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:20:07,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 77 [2021-11-09 09:20:07,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 71 treesize of output 59 [2021-11-09 09:20:07,109 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:20:07,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 55 [2021-11-09 09:20:07,299 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:20:07,299 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 97 treesize of output 94 [2021-11-09 09:20:07,307 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:20:07,308 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 111 treesize of output 102 [2021-11-09 09:20:07,317 INFO L354 Elim1Store]: treesize reduction 37, result has 24.5 percent of original size [2021-11-09 09:20:07,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 90 [2021-11-09 09:20:07,332 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:20:07,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 81 treesize of output 83 [2021-11-09 09:20:07,995 INFO L354 Elim1Store]: treesize reduction 110, result has 9.1 percent of original size [2021-11-09 09:20:07,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 139 treesize of output 81 [2021-11-09 09:20:08,015 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:20:08,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 52 treesize of output 40 [2021-11-09 09:20:08,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:08,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242560029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:08,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:08,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-11-09 09:20:08,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643160489] [2021-11-09 09:20:08,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 09:20:08,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:08,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 09:20:08,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-11-09 09:20:08,027 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:08,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:08,564 INFO L93 Difference]: Finished difference Result 99 states and 114 transitions. [2021-11-09 09:20:08,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 09:20:08,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 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 38 [2021-11-09 09:20:08,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:08,564 INFO L225 Difference]: With dead ends: 99 [2021-11-09 09:20:08,564 INFO L226 Difference]: Without dead ends: 73 [2021-11-09 09:20:08,565 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=90, Invalid=560, Unknown=0, NotChecked=0, Total=650 [2021-11-09 09:20:08,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-09 09:20:08,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-11-09 09:20:08,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 71 states have (on average 1.2112676056338028) internal successors, (86), 72 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:08,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 86 transitions. [2021-11-09 09:20:08,577 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 86 transitions. Word has length 38 [2021-11-09 09:20:08,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:08,577 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 86 transitions. [2021-11-09 09:20:08,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.6842105263157894) internal successors, (70), 19 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:08,577 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 86 transitions. [2021-11-09 09:20:08,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:20:08,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:08,577 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:08,601 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 09:20:08,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-09 09:20:08,778 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:20:08,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:08,778 INFO L85 PathProgramCache]: Analyzing trace with hash -901782222, now seen corresponding path program 5 times [2021-11-09 09:20:08,779 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:08,779 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142488910] [2021-11-09 09:20:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:08,779 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:08,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:10,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:10,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142488910] [2021-11-09 09:20:10,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142488910] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:10,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400730431] [2021-11-09 09:20:10,355 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:20:10,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:10,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:10,356 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:10,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 09:20:11,285 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:20:11,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:11,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 09:20:11,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:11,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:20:11,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2021-11-09 09:20:11,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:11,446 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:20:11,454 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:20:11,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 44 [2021-11-09 09:20:11,472 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:20:11,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:20:11,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:20:11,858 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:20:11,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 116 [2021-11-09 09:20:11,892 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:20:11,892 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 3 case distinctions, treesize of input 139 treesize of output 126 [2021-11-09 09:20:11,928 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:20:11,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 136 [2021-11-09 09:20:11,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 127 treesize of output 115 [2021-11-09 09:20:11,965 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:20:11,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 112 treesize of output 111 [2021-11-09 09:20:12,315 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:20:12,316 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 136 [2021-11-09 09:20:12,349 INFO L354 Elim1Store]: treesize reduction 120, result has 22.6 percent of original size [2021-11-09 09:20:12,350 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 3 case distinctions, treesize of input 205 treesize of output 188 [2021-11-09 09:20:12,357 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:20:12,358 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 187 treesize of output 178 [2021-11-09 09:20:12,373 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:20:12,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 172 treesize of output 156 [2021-11-09 09:20:12,392 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:20:12,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 146 [2021-11-09 09:20:13,836 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-09 09:20:13,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 108 [2021-11-09 09:20:13,867 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:20:13,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 67 [2021-11-09 09:20:13,970 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:20:13,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-09 09:20:13,977 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 10 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:13,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400730431] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:13,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:13,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 15] total 37 [2021-11-09 09:20:13,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498315832] [2021-11-09 09:20:13,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:20:13,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:13,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:20:13,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1224, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:20:13,980 INFO L87 Difference]: Start difference. First operand 73 states and 86 transitions. Second operand has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 37 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:20:39,386 INFO L93 Difference]: Finished difference Result 632 states and 692 transitions. [2021-11-09 09:20:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-11-09 09:20:39,386 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 37 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 09:20:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:20:39,389 INFO L225 Difference]: With dead ends: 632 [2021-11-09 09:20:39,389 INFO L226 Difference]: Without dead ends: 630 [2021-11-09 09:20:39,395 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9499 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=3620, Invalid=26482, Unknown=0, NotChecked=0, Total=30102 [2021-11-09 09:20:39,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 630 states. [2021-11-09 09:20:39,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 630 to 198. [2021-11-09 09:20:39,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 196 states have (on average 1.2551020408163265) internal successors, (246), 197 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:39,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 246 transitions. [2021-11-09 09:20:39,446 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 246 transitions. Word has length 43 [2021-11-09 09:20:39,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:20:39,446 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 246 transitions. [2021-11-09 09:20:39,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.2432432432432434) internal successors, (83), 37 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:20:39,447 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 246 transitions. [2021-11-09 09:20:39,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:20:39,447 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:20:39,447 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:20:39,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-09 09:20:39,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-09 09:20:39,648 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:20:39,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:20:39,648 INFO L85 PathProgramCache]: Analyzing trace with hash 2140995186, now seen corresponding path program 3 times [2021-11-09 09:20:39,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:20:39,648 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527584655] [2021-11-09 09:20:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:20:39,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:20:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:20:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:40,136 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:20:40,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527584655] [2021-11-09 09:20:40,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527584655] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:40,136 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390957200] [2021-11-09 09:20:40,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:20:40,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:20:40,136 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:20:40,137 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:20:40,138 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 09:20:41,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:20:41,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:20:41,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 09:20:41,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:20:41,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:20:41,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:20:41,296 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:20:41,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-09 09:20:41,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:20:41,316 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:20:41,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:20:41,491 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:20:41,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 114 [2021-11-09 09:20:41,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2021-11-09 09:20:41,508 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:20:41,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2021-11-09 09:20:41,535 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:20:41,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 117 [2021-11-09 09:20:41,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 96 [2021-11-09 09:20:41,550 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:20:41,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 92 [2021-11-09 09:20:41,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:41,871 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:20:41,871 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 133 [2021-11-09 09:20:41,876 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:41,877 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:20:41,887 INFO L354 Elim1Store]: treesize reduction 53, result has 26.4 percent of original size [2021-11-09 09:20:41,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 176 [2021-11-09 09:20:41,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:20:41,894 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:20:41,894 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 164 treesize of output 151 [2021-11-09 09:20:41,907 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:20:41,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 129 [2021-11-09 09:20:41,925 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:20:41,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 119 [2021-11-09 09:20:43,326 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-09 09:20:43,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 186 treesize of output 108 [2021-11-09 09:20:43,357 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:20:43,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 67 [2021-11-09 09:20:43,436 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:20:43,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-09 09:20:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:20:43,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390957200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:20:43,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:20:43,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 30 [2021-11-09 09:20:43,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785862721] [2021-11-09 09:20:43,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:20:43,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:20:43,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:20:43,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=800, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:20:43,446 INFO L87 Difference]: Start difference. First operand 198 states and 246 transitions. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:02,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:02,671 INFO L93 Difference]: Finished difference Result 837 states and 939 transitions. [2021-11-09 09:21:02,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-09 09:21:02,671 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 09:21:02,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:02,675 INFO L225 Difference]: With dead ends: 837 [2021-11-09 09:21:02,675 INFO L226 Difference]: Without dead ends: 835 [2021-11-09 09:21:02,678 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8064 ImplicationChecksByTransitivity, 16.4s TimeCoverageRelationStatistics Valid=3010, Invalid=21170, Unknown=0, NotChecked=0, Total=24180 [2021-11-09 09:21:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-11-09 09:21:02,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 226. [2021-11-09 09:21:02,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 224 states have (on average 1.2767857142857142) internal successors, (286), 225 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:02,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 286 transitions. [2021-11-09 09:21:02,769 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 286 transitions. Word has length 43 [2021-11-09 09:21:02,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:02,770 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 286 transitions. [2021-11-09 09:21:02,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:02,770 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 286 transitions. [2021-11-09 09:21:02,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 09:21:02,772 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:02,772 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:02,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:02,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:02,996 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:21:02,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:02,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1473257422, now seen corresponding path program 1 times [2021-11-09 09:21:02,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:02,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044230089] [2021-11-09 09:21:02,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:02,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:03,887 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 9 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:03,887 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:03,887 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044230089] [2021-11-09 09:21:03,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044230089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:03,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852783148] [2021-11-09 09:21:03,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:03,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:03,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:03,889 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:03,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 09:21:05,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:05,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 09:21:05,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:05,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:21:05,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-11-09 09:21:05,182 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:21:05,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2021-11-09 09:21:05,205 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:21:05,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:21:05,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:21:05,381 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:21:05,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2021-11-09 09:21:05,394 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:21:05,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 112 [2021-11-09 09:21:05,422 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:21:05,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 90 treesize of output 105 [2021-11-09 09:21:05,433 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:21:05,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 99 [2021-11-09 09:21:05,708 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:21:05,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 156 [2021-11-09 09:21:05,716 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:21:05,716 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 146 treesize of output 104 [2021-11-09 09:21:05,740 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:21:05,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 100 [2021-11-09 09:21:05,762 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:21:05,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 144 [2021-11-09 09:21:05,786 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:21:05,787 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 3 case distinctions, treesize of input 120 treesize of output 126 [2021-11-09 09:21:06,867 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-09 09:21:06,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 97 [2021-11-09 09:21:06,894 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:21:06,894 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 56 [2021-11-09 09:21:06,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:21:06,952 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 8 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:06,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852783148] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:06,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:06,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 12] total 30 [2021-11-09 09:21:06,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048424398] [2021-11-09 09:21:06,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:21:06,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:06,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:21:06,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:21:06,953 INFO L87 Difference]: Start difference. First operand 226 states and 286 transitions. Second operand has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:19,506 INFO L93 Difference]: Finished difference Result 511 states and 625 transitions. [2021-11-09 09:21:19,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-09 09:21:19,507 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-09 09:21:19,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:19,510 INFO L225 Difference]: With dead ends: 511 [2021-11-09 09:21:19,510 INFO L226 Difference]: Without dead ends: 509 [2021-11-09 09:21:19,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1887 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=1617, Invalid=6573, Unknown=0, NotChecked=0, Total=8190 [2021-11-09 09:21:19,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-09 09:21:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 76. [2021-11-09 09:21:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 74 states have (on average 1.2027027027027026) internal successors, (89), 75 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:19,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 89 transitions. [2021-11-09 09:21:19,546 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 89 transitions. Word has length 43 [2021-11-09 09:21:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:19,547 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 89 transitions. [2021-11-09 09:21:19,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7) internal successors, (81), 30 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 89 transitions. [2021-11-09 09:21:19,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:21:19,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:19,548 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:19,598 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:19,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:19,768 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:21:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:19,777 INFO L85 PathProgramCache]: Analyzing trace with hash 970804020, now seen corresponding path program 3 times [2021-11-09 09:21:19,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:19,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330775887] [2021-11-09 09:21:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:19,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:19,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:20,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:20,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330775887] [2021-11-09 09:21:20,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330775887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:20,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513472050] [2021-11-09 09:21:20,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:21:20,708 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:20,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:20,708 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:20,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 09:21:21,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:21:21,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:21,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 09:21:21,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:21,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 11 [2021-11-09 09:21:21,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:21:22,068 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:21:22,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-09 09:21:22,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:21:22,089 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:21:22,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:21:22,102 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:21:22,297 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:21:22,298 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2021-11-09 09:21:22,308 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:21:22,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 112 [2021-11-09 09:21:22,331 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:21:22,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 117 [2021-11-09 09:21:22,342 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:21:22,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 99 [2021-11-09 09:21:22,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:21:22,580 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:21:22,597 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:21:22,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 166 [2021-11-09 09:21:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:21:22,630 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:21:22,630 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 113 [2021-11-09 09:21:22,644 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:21:22,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 148 [2021-11-09 09:21:22,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:21:22,673 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:21:22,673 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 3 case distinctions, treesize of input 122 treesize of output 128 [2021-11-09 09:21:24,117 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-09 09:21:24,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 189 treesize of output 111 [2021-11-09 09:21:24,148 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:21:24,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 70 [2021-11-09 09:21:24,255 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:21:24,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-11-09 09:21:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 6 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:24,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513472050] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:24,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:24,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 32 [2021-11-09 09:21:24,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929371116] [2021-11-09 09:21:24,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:21:24,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:24,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:21:24,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=906, Unknown=0, NotChecked=0, Total=992 [2021-11-09 09:21:24,293 INFO L87 Difference]: Start difference. First operand 76 states and 89 transitions. Second operand has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:29,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:29,336 INFO L93 Difference]: Finished difference Result 157 states and 176 transitions. [2021-11-09 09:21:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 09:21:29,341 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:21:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:29,342 INFO L225 Difference]: With dead ends: 157 [2021-11-09 09:21:29,342 INFO L226 Difference]: Without dead ends: 155 [2021-11-09 09:21:29,344 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=648, Invalid=3012, Unknown=0, NotChecked=0, Total=3660 [2021-11-09 09:21:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-11-09 09:21:29,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 114. [2021-11-09 09:21:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 112 states have (on average 1.1696428571428572) internal successors, (131), 113 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:29,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 131 transitions. [2021-11-09 09:21:29,392 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 131 transitions. Word has length 45 [2021-11-09 09:21:29,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:29,393 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 131 transitions. [2021-11-09 09:21:29,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.6875) internal successors, (86), 32 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:29,393 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 131 transitions. [2021-11-09 09:21:29,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:21:29,394 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:29,394 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:29,432 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:29,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-09 09:21:29,608 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:21:29,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:29,609 INFO L85 PathProgramCache]: Analyzing trace with hash 269204146, now seen corresponding path program 7 times [2021-11-09 09:21:29,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:29,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433635767] [2021-11-09 09:21:29,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:29,609 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:30,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:30,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433635767] [2021-11-09 09:21:30,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433635767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:30,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228107689] [2021-11-09 09:21:30,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:21:30,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:30,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:30,096 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:30,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 09:21:31,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:31,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 09:21:31,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:31,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:21:31,468 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:21:31,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-09 09:21:31,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:21:31,482 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:21:31,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:21:31,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:21:31,664 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:21:31,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 105 [2021-11-09 09:21:31,680 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:21:31,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 112 [2021-11-09 09:21:31,684 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 90 [2021-11-09 09:21:31,696 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:21:31,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 86 [2021-11-09 09:21:31,722 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:21:31,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 98 [2021-11-09 09:21:31,945 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:21:31,946 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 164 treesize of output 122 [2021-11-09 09:21:31,974 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:21:31,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 149 treesize of output 118 [2021-11-09 09:21:31,992 INFO L354 Elim1Store]: treesize reduction 53, result has 26.4 percent of original size [2021-11-09 09:21:31,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 178 treesize of output 170 [2021-11-09 09:21:32,010 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:21:32,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 144 [2021-11-09 09:21:32,017 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:21:32,017 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 132 treesize of output 123 [2021-11-09 09:21:32,038 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:21:32,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 119 [2021-11-09 09:21:32,947 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-09 09:21:32,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 175 treesize of output 97 [2021-11-09 09:21:32,967 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:21:32,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 56 [2021-11-09 09:21:33,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:21:33,018 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:33,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228107689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:33,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:33,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 12] total 28 [2021-11-09 09:21:33,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964917941] [2021-11-09 09:21:33,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-09 09:21:33,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-09 09:21:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-11-09 09:21:33,019 INFO L87 Difference]: Start difference. First operand 114 states and 131 transitions. Second operand has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:40,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:21:40,736 INFO L93 Difference]: Finished difference Result 337 states and 371 transitions. [2021-11-09 09:21:40,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-09 09:21:40,736 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 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 45 [2021-11-09 09:21:40,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:21:40,738 INFO L225 Difference]: With dead ends: 337 [2021-11-09 09:21:40,738 INFO L226 Difference]: Without dead ends: 335 [2021-11-09 09:21:40,739 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1732 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1447, Invalid=5863, Unknown=0, NotChecked=0, Total=7310 [2021-11-09 09:21:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-11-09 09:21:40,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 146. [2021-11-09 09:21:40,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 144 states have (on average 1.2152777777777777) internal successors, (175), 145 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:40,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 175 transitions. [2021-11-09 09:21:40,780 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 175 transitions. Word has length 45 [2021-11-09 09:21:40,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:21:40,780 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 175 transitions. [2021-11-09 09:21:40,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.107142857142857) internal successors, (87), 28 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:21:40,780 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 175 transitions. [2021-11-09 09:21:40,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:21:40,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:21:40,781 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:21:40,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 09:21:40,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:40,983 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:21:40,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:21:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1538950708, now seen corresponding path program 3 times [2021-11-09 09:21:40,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:21:40,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193292720] [2021-11-09 09:21:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:21:40,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:21:41,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:21:41,703 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:41,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:21:41,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193292720] [2021-11-09 09:21:41,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193292720] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:41,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707643005] [2021-11-09 09:21:41,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:21:41,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:21:41,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:21:41,705 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:21:41,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 09:21:43,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:21:43,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:21:43,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 09:21:43,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:21:43,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:21:43,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 68 [2021-11-09 09:21:43,182 INFO L354 Elim1Store]: treesize reduction 101, result has 11.4 percent of original size [2021-11-09 09:21:43,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 73 treesize of output 65 [2021-11-09 09:21:43,194 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:21:43,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 55 treesize of output 59 [2021-11-09 09:21:43,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-11-09 09:21:43,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 135 treesize of output 115 [2021-11-09 09:21:43,383 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:21:43,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 111 [2021-11-09 09:21:43,399 INFO L354 Elim1Store]: treesize reduction 185, result has 11.9 percent of original size [2021-11-09 09:21:43,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 141 treesize of output 133 [2021-11-09 09:21:43,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 123 treesize of output 95 [2021-11-09 09:21:43,412 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:21:43,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 91 [2021-11-09 09:21:43,432 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:21:43,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 104 treesize of output 119 [2021-11-09 09:21:43,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:21:43,734 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:21:43,734 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 181 treesize of output 146 [2021-11-09 09:21:43,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:21:43,757 INFO L354 Elim1Store]: treesize reduction 245, result has 11.9 percent of original size [2021-11-09 09:21:43,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 213 treesize of output 205 [2021-11-09 09:21:43,762 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:21:43,764 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:21:43,765 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 193 treesize of output 156 [2021-11-09 09:21:43,782 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:21:43,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 174 treesize of output 152 [2021-11-09 09:21:43,794 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:21:43,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 154 [2021-11-09 09:21:51,245 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-09 09:21:51,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 215 treesize of output 121 [2021-11-09 09:21:51,268 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:21:51,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 92 treesize of output 72 [2021-11-09 09:21:51,395 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 09:21:51,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 20 [2021-11-09 09:21:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:21:51,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707643005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:21:51,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:21:51,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 32 [2021-11-09 09:21:51,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344155650] [2021-11-09 09:21:51,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-09 09:21:51,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:21:51,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-09 09:21:51,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=918, Unknown=3, NotChecked=0, Total=992 [2021-11-09 09:21:51,404 INFO L87 Difference]: Start difference. First operand 146 states and 175 transitions. Second operand has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 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) [2021-11-09 09:23:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:16,008 INFO L93 Difference]: Finished difference Result 1190 states and 1304 transitions. [2021-11-09 09:23:16,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-11-09 09:23:16,008 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 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) Word has length 45 [2021-11-09 09:23:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:16,012 INFO L225 Difference]: With dead ends: 1190 [2021-11-09 09:23:16,013 INFO L226 Difference]: Without dead ends: 1188 [2021-11-09 09:23:16,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26896 ImplicationChecksByTransitivity, 70.9s TimeCoverageRelationStatistics Valid=5723, Invalid=63691, Unknown=18, NotChecked=0, Total=69432 [2021-11-09 09:23:16,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-11-09 09:23:16,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 267. [2021-11-09 09:23:16,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 265 states have (on average 1.3245283018867924) internal successors, (351), 266 states have internal predecessors, (351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:16,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 351 transitions. [2021-11-09 09:23:16,126 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 351 transitions. Word has length 45 [2021-11-09 09:23:16,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:16,126 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 351 transitions. [2021-11-09 09:23:16,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.65625) internal successors, (85), 32 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) [2021-11-09 09:23:16,126 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 351 transitions. [2021-11-09 09:23:16,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:23:16,127 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:16,127 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:23:16,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:16,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:16,332 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:23:16,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:16,333 INFO L85 PathProgramCache]: Analyzing trace with hash -2071413068, now seen corresponding path program 8 times [2021-11-09 09:23:16,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:16,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850902235] [2021-11-09 09:23:16,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:16,333 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:16,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:16,957 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:23:16,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:16,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850902235] [2021-11-09 09:23:16,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850902235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:16,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776019569] [2021-11-09 09:23:16,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:23:16,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:16,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:16,959 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:16,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 09:23:18,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:23:18,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:18,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 09:23:18,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:18,429 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:23:18,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:18,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:23:18,519 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:23:18,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2021-11-09 09:23:18,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:23:18,534 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:23:18,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:23:18,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:23:18,854 INFO L354 Elim1Store]: treesize reduction 56, result has 25.3 percent of original size [2021-11-09 09:23:18,854 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 3 case distinctions, treesize of input 125 treesize of output 116 [2021-11-09 09:23:18,873 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:23:18,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 95 treesize of output 94 [2021-11-09 09:23:18,900 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:23:18,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 105 treesize of output 120 [2021-11-09 09:23:18,914 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:23:18,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 99 treesize of output 102 [2021-11-09 09:23:19,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:19,124 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:23:19,147 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:23:19,148 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 3 case distinctions, treesize of input 177 treesize of output 164 [2021-11-09 09:23:19,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:19,174 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:23:19,174 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 143 treesize of output 120 [2021-11-09 09:23:19,188 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:23:19,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 167 treesize of output 151 [2021-11-09 09:23:19,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:19,226 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:23:19,227 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 3 case distinctions, treesize of input 125 treesize of output 131 [2021-11-09 09:23:20,437 INFO L354 Elim1Store]: treesize reduction 106, result has 12.4 percent of original size [2021-11-09 09:23:20,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 173 treesize of output 107 [2021-11-09 09:23:20,459 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:23:20,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 66 [2021-11-09 09:23:20,629 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-09 09:23:20,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-11-09 09:23:20,669 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:23:20,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776019569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:20,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:20,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 33 [2021-11-09 09:23:20,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820648610] [2021-11-09 09:23:20,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:23:20,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:20,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:23:20,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:23:20,671 INFO L87 Difference]: Start difference. First operand 267 states and 351 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:30,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:23:30,648 INFO L93 Difference]: Finished difference Result 687 states and 791 transitions. [2021-11-09 09:23:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-09 09:23:30,649 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:23:30,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:23:30,652 INFO L225 Difference]: With dead ends: 687 [2021-11-09 09:23:30,652 INFO L226 Difference]: Without dead ends: 685 [2021-11-09 09:23:30,654 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4066 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1950, Invalid=11622, Unknown=0, NotChecked=0, Total=13572 [2021-11-09 09:23:30,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-11-09 09:23:30,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 286. [2021-11-09 09:23:30,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 284 states have (on average 1.3274647887323943) internal successors, (377), 285 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:30,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 377 transitions. [2021-11-09 09:23:30,824 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 377 transitions. Word has length 45 [2021-11-09 09:23:30,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:23:30,824 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 377 transitions. [2021-11-09 09:23:30,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:23:30,825 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 377 transitions. [2021-11-09 09:23:30,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:23:30,826 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:23:30,826 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:23:30,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 09:23:31,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:31,045 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:23:31,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:23:31,045 INFO L85 PathProgramCache]: Analyzing trace with hash -839046096, now seen corresponding path program 9 times [2021-11-09 09:23:31,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:23:31,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169264075] [2021-11-09 09:23:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:23:31,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:23:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:23:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:23:31,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:23:31,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169264075] [2021-11-09 09:23:31,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169264075] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:31,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224420135] [2021-11-09 09:23:31,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:23:31,957 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:23:31,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:23:31,960 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:23:31,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-09 09:23:33,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:23:33,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:23:33,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 09:23:33,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:23:33,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:23:33,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:23:33,932 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:23:33,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-09 09:23:33,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:23:33,947 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:23:33,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:23:34,083 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 102 [2021-11-09 09:23:34,094 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:23:34,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 98 [2021-11-09 09:23:34,105 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:23:34,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 112 [2021-11-09 09:23:34,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 90 [2021-11-09 09:23:34,137 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:23:34,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 102 [2021-11-09 09:23:34,145 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:23:34,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 92 [2021-11-09 09:23:34,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:34,377 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:23:34,377 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 160 treesize of output 133 [2021-11-09 09:23:34,382 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:34,383 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:23:34,393 INFO L354 Elim1Store]: treesize reduction 53, result has 26.4 percent of original size [2021-11-09 09:23:34,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 176 [2021-11-09 09:23:34,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:23:34,400 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:23:34,401 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 164 treesize of output 151 [2021-11-09 09:23:34,413 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:23:34,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 145 treesize of output 129 [2021-11-09 09:23:34,431 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:23:34,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 117 treesize of output 119 [2021-11-09 09:23:35,653 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-09 09:23:35,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 186 treesize of output 108 [2021-11-09 09:23:35,676 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:23:35,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 67 [2021-11-09 09:23:35,773 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:23:35,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-09 09:23:35,779 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:23:35,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224420135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:23:35,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:23:35,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15] total 31 [2021-11-09 09:23:35,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485550794] [2021-11-09 09:23:35,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 09:23:35,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:23:35,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 09:23:35,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=856, Unknown=0, NotChecked=0, Total=930 [2021-11-09 09:23:35,782 INFO L87 Difference]: Start difference. First operand 286 states and 377 transitions. Second operand has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 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) [2021-11-09 09:24:04,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:24:04,296 INFO L93 Difference]: Finished difference Result 1488 states and 1658 transitions. [2021-11-09 09:24:04,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-11-09 09:24:04,297 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 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) Word has length 45 [2021-11-09 09:24:04,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:24:04,302 INFO L225 Difference]: With dead ends: 1488 [2021-11-09 09:24:04,302 INFO L226 Difference]: Without dead ends: 1486 [2021-11-09 09:24:04,304 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26952 ImplicationChecksByTransitivity, 22.3s TimeCoverageRelationStatistics Valid=4031, Invalid=63829, Unknown=0, NotChecked=0, Total=67860 [2021-11-09 09:24:04,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-11-09 09:24:04,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 367. [2021-11-09 09:24:04,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 365 states have (on average 1.3643835616438356) internal successors, (498), 366 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:24:04,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 498 transitions. [2021-11-09 09:24:04,442 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 498 transitions. Word has length 45 [2021-11-09 09:24:04,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:24:04,442 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 498 transitions. [2021-11-09 09:24:04,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.7419354838709675) internal successors, (85), 31 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) [2021-11-09 09:24:04,442 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 498 transitions. [2021-11-09 09:24:04,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:24:04,443 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:24:04,443 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 09:24:04,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-09 09:24:04,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:24:04,643 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:24:04,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:24:04,644 INFO L85 PathProgramCache]: Analyzing trace with hash -20429070, now seen corresponding path program 10 times [2021-11-09 09:24:04,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:24:04,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135952784] [2021-11-09 09:24:04,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:24:04,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:24:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:05,129 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:24:05,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:24:05,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135952784] [2021-11-09 09:24:05,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135952784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:05,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379037443] [2021-11-09 09:24:05,129 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:24:05,129 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:24:05,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:24:05,130 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:24:05,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-09 09:24:06,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:24:06,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:24:06,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 09:24:06,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:24:06,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:24:06,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:24:06,920 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:24:06,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-09 09:24:06,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:24:06,937 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:24:06,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:24:07,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 102 [2021-11-09 09:24:07,162 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:24:07,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 98 [2021-11-09 09:24:07,173 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:24:07,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 112 [2021-11-09 09:24:07,195 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:24:07,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 117 [2021-11-09 09:24:07,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 96 [2021-11-09 09:24:07,217 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:24:07,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 93 treesize of output 92 [2021-11-09 09:24:07,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:24:07,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:24:07,449 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:24:07,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 174 treesize of output 166 [2021-11-09 09:24:07,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:24:07,474 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:24:07,474 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 113 [2021-11-09 09:24:07,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:24:07,481 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:24:07,481 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 164 treesize of output 151 [2021-11-09 09:24:07,497 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:24:07,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 145 treesize of output 147 [2021-11-09 09:24:07,509 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:24:07,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 141 treesize of output 125 [2021-11-09 09:24:08,488 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-09 09:24:08,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 170 treesize of output 104 [2021-11-09 09:24:08,508 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:24:08,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 75 treesize of output 63 [2021-11-09 09:24:08,579 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 09:24:08,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 14 [2021-11-09 09:24:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:24:08,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379037443] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:08,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:24:08,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 14] total 30 [2021-11-09 09:24:08,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400091807] [2021-11-09 09:24:08,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 09:24:08,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:24:08,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 09:24:08,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2021-11-09 09:24:08,600 INFO L87 Difference]: Start difference. First operand 367 states and 498 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 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) [2021-11-09 09:24:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:24:10,882 INFO L93 Difference]: Finished difference Result 610 states and 751 transitions. [2021-11-09 09:24:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 09:24:10,882 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 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) Word has length 45 [2021-11-09 09:24:10,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:24:10,885 INFO L225 Difference]: With dead ends: 610 [2021-11-09 09:24:10,885 INFO L226 Difference]: Without dead ends: 608 [2021-11-09 09:24:10,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=253, Invalid=1817, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 09:24:10,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-11-09 09:24:11,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 371. [2021-11-09 09:24:11,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 369 states have (on average 1.3658536585365855) internal successors, (504), 370 states have internal predecessors, (504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:24:11,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 504 transitions. [2021-11-09 09:24:11,065 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 504 transitions. Word has length 45 [2021-11-09 09:24:11,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:24:11,066 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 504 transitions. [2021-11-09 09:24:11,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 30 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) [2021-11-09 09:24:11,066 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 504 transitions. [2021-11-09 09:24:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:24:11,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:24:11,068 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:24:11,104 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-11-09 09:24:11,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-09 09:24:11,280 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:24:11,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:24:11,281 INFO L85 PathProgramCache]: Analyzing trace with hash -310665804, now seen corresponding path program 11 times [2021-11-09 09:24:11,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:24:11,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764262613] [2021-11-09 09:24:11,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:24:11,281 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:24:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:24:11,917 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:24:11,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:24:11,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764262613] [2021-11-09 09:24:11,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764262613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:11,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135673771] [2021-11-09 09:24:11,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:24:11,917 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:24:11,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:24:11,918 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:24:11,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-09 09:24:13,715 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-09 09:24:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:24:13,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-09 09:24:13,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:24:13,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:24:13,840 INFO L354 Elim1Store]: treesize reduction 73, result has 11.0 percent of original size [2021-11-09 09:24:13,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 58 [2021-11-09 09:24:13,853 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 09:24:13,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 48 treesize of output 52 [2021-11-09 09:24:13,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 42 [2021-11-09 09:24:13,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2021-11-09 09:24:14,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:24:14,038 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:24:14,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 117 treesize of output 112 [2021-11-09 09:24:14,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:24:14,058 INFO L354 Elim1Store]: treesize reduction 189, result has 11.7 percent of original size [2021-11-09 09:24:14,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 125 treesize of output 117 [2021-11-09 09:24:14,063 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:24:14,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 105 treesize of output 89 [2021-11-09 09:24:14,076 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:24:14,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 86 treesize of output 85 [2021-11-09 09:24:14,098 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:24:14,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 82 treesize of output 97 [2021-11-09 09:24:14,461 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:24:14,497 INFO L354 Elim1Store]: treesize reduction 124, result has 10.8 percent of original size [2021-11-09 09:24:14,498 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 170 treesize of output 143 [2021-11-09 09:24:14,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:24:14,546 INFO L354 Elim1Store]: treesize reduction 376, result has 10.7 percent of original size [2021-11-09 09:24:14,547 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 3 case distinctions, treesize of input 202 treesize of output 189 [2021-11-09 09:24:14,570 INFO L354 Elim1Store]: treesize reduction 124, result has 17.9 percent of original size [2021-11-09 09:24:14,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 182 treesize of output 169 [2021-11-09 09:24:14,590 INFO L354 Elim1Store]: treesize reduction 104, result has 20.6 percent of original size [2021-11-09 09:24:14,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 163 treesize of output 165 [2021-11-09 09:24:14,609 INFO L354 Elim1Store]: treesize reduction 84, result has 30.6 percent of original size [2021-11-09 09:24:14,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 159 treesize of output 163 [2021-11-09 09:24:16,062 INFO L354 Elim1Store]: treesize reduction 118, result has 8.5 percent of original size [2021-11-09 09:24:16,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 228 treesize of output 122 [2021-11-09 09:24:16,090 INFO L354 Elim1Store]: treesize reduction 102, result has 6.4 percent of original size [2021-11-09 09:24:16,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 81 [2021-11-09 09:24:16,307 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-09 09:24:16,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 25 [2021-11-09 09:24:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 13 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:24:16,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135673771] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:24:16,351 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:24:16,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 16] total 34 [2021-11-09 09:24:16,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330912076] [2021-11-09 09:24:16,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 09:24:16,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:24:16,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 09:24:16,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1034, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 09:24:16,353 INFO L87 Difference]: Start difference. First operand 371 states and 504 transitions. Second operand has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:27:09,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:27:09,223 INFO L93 Difference]: Finished difference Result 1065 states and 1256 transitions. [2021-11-09 09:27:09,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2021-11-09 09:27:09,223 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:27:09,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:27:09,229 INFO L225 Difference]: With dead ends: 1065 [2021-11-09 09:27:09,229 INFO L226 Difference]: Without dead ends: 1063 [2021-11-09 09:27:09,231 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10533 ImplicationChecksByTransitivity, 115.5s TimeCoverageRelationStatistics Valid=4353, Invalid=28546, Unknown=43, NotChecked=0, Total=32942 [2021-11-09 09:27:09,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-11-09 09:27:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 387. [2021-11-09 09:27:09,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 385 states have (on average 1.374025974025974) internal successors, (529), 386 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:27:09,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 529 transitions. [2021-11-09 09:27:09,402 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 529 transitions. Word has length 45 [2021-11-09 09:27:09,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:27:09,402 INFO L470 AbstractCegarLoop]: Abstraction has 387 states and 529 transitions. [2021-11-09 09:27:09,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:27:09,402 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 529 transitions. [2021-11-09 09:27:09,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:27:09,403 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:27:09,403 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 09:27:09,430 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-09 09:27:09,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-09 09:27:09,604 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:27:09,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:27:09,604 INFO L85 PathProgramCache]: Analyzing trace with hash -502469578, now seen corresponding path program 12 times [2021-11-09 09:27:09,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:27:09,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054505267] [2021-11-09 09:27:09,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:27:09,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:27:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:27:10,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:27:10,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054505267] [2021-11-09 09:27:10,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054505267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:10,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949396290] [2021-11-09 09:27:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:27:10,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:27:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:27:10,411 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:27:10,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-09 09:27:12,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 09:27:12,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:27:12,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 09:27:12,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:27:12,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:27:12,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:27:12,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:12,471 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:27:12,478 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:27:12,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2021-11-09 09:27:12,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:27:12,495 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:27:12,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:27:12,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:12,776 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:27:12,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 120 [2021-11-09 09:27:12,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:12,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:27:12,798 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:27:12,798 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 3 case distinctions, treesize of input 129 treesize of output 116 [2021-11-09 09:27:12,822 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:27:12,822 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 109 treesize of output 124 [2021-11-09 09:27:12,828 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:12,835 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:27:12,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 101 treesize of output 104 [2021-11-09 09:27:13,289 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:27:13,290 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 154 treesize of output 139 [2021-11-09 09:27:13,328 INFO L354 Elim1Store]: treesize reduction 192, result has 19.3 percent of original size [2021-11-09 09:27:13,329 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 6 case distinctions, treesize of input 180 treesize of output 158 [2021-11-09 09:27:13,344 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:27:13,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 146 [2021-11-09 09:27:13,349 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:27:13,349 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 134 treesize of output 125 [2021-11-09 09:27:13,364 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:27:13,365 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 119 treesize of output 121 [2021-11-09 09:27:14,293 INFO L354 Elim1Store]: treesize reduction 106, result has 12.4 percent of original size [2021-11-09 09:27:14,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 177 treesize of output 107 [2021-11-09 09:27:14,314 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:27:14,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 78 treesize of output 66 [2021-11-09 09:27:14,461 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-09 09:27:14,461 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-11-09 09:27:14,511 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:27:14,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949396290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:14,511 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:27:14,511 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 17] total 38 [2021-11-09 09:27:14,511 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088706133] [2021-11-09 09:27:14,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-09 09:27:14,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:27:14,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-09 09:27:14,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 09:27:14,513 INFO L87 Difference]: Start difference. First operand 387 states and 529 transitions. Second operand has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:27:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:27:26,065 INFO L93 Difference]: Finished difference Result 636 states and 779 transitions. [2021-11-09 09:27:26,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-09 09:27:26,065 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:27:26,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:27:26,068 INFO L225 Difference]: With dead ends: 636 [2021-11-09 09:27:26,068 INFO L226 Difference]: Without dead ends: 634 [2021-11-09 09:27:26,068 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1802 ImplicationChecksByTransitivity, 10.7s TimeCoverageRelationStatistics Valid=1608, Invalid=7898, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 09:27:26,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-11-09 09:27:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 371. [2021-11-09 09:27:26,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 369 states have (on average 1.3712737127371273) internal successors, (506), 370 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:27:26,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 506 transitions. [2021-11-09 09:27:26,245 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 506 transitions. Word has length 45 [2021-11-09 09:27:26,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:27:26,245 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 506 transitions. [2021-11-09 09:27:26,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.263157894736842) internal successors, (86), 38 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:27:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 506 transitions. [2021-11-09 09:27:26,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:27:26,247 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:27:26,247 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:27:26,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-09 09:27:26,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 09:27:26,472 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:27:26,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:27:26,472 INFO L85 PathProgramCache]: Analyzing trace with hash 883733816, now seen corresponding path program 13 times [2021-11-09 09:27:26,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:27:26,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893970060] [2021-11-09 09:27:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:27:26,473 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:27:26,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:27,263 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:27:27,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:27:27,263 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893970060] [2021-11-09 09:27:27,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893970060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:27,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493028408] [2021-11-09 09:27:27,264 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:27:27,264 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:27:27,264 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:27:27,268 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:27:27,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-09 09:27:29,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:27:29,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-09 09:27:29,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:27:29,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:27:29,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:27:29,376 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:27:29,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:27:29,392 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:27:29,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 47 [2021-11-09 09:27:29,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:27:29,411 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:27:29,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:27:29,734 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:27:29,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 121 treesize of output 116 [2021-11-09 09:27:29,753 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:27:29,754 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 3 case distinctions, treesize of input 139 treesize of output 126 [2021-11-09 09:27:29,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 109 [2021-11-09 09:27:29,768 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:27:29,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 106 treesize of output 105 [2021-11-09 09:27:29,792 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:27:29,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 117 [2021-11-09 09:27:30,078 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:27:30,079 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 171 treesize of output 136 [2021-11-09 09:27:30,120 INFO L354 Elim1Store]: treesize reduction 120, result has 22.6 percent of original size [2021-11-09 09:27:30,120 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 3 case distinctions, treesize of input 205 treesize of output 188 [2021-11-09 09:27:30,136 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:27:30,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 171 [2021-11-09 09:27:30,143 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:27:30,143 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 159 treesize of output 150 [2021-11-09 09:27:30,160 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:27:30,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 144 treesize of output 146 [2021-11-09 09:27:31,142 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-09 09:27:31,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 202 treesize of output 108 [2021-11-09 09:27:31,168 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:27:31,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 79 treesize of output 67 [2021-11-09 09:27:31,262 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:27:31,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 14 [2021-11-09 09:27:31,267 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:27:31,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493028408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:27:31,268 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:27:31,268 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 33 [2021-11-09 09:27:31,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191476944] [2021-11-09 09:27:31,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:27:31,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:27:31,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:27:31,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=982, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:27:31,269 INFO L87 Difference]: Start difference. First operand 371 states and 506 transitions. Second operand has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 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) [2021-11-09 09:28:25,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:28:25,342 INFO L93 Difference]: Finished difference Result 1569 states and 1775 transitions. [2021-11-09 09:28:25,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 275 states. [2021-11-09 09:28:25,343 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 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) Word has length 45 [2021-11-09 09:28:25,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:28:25,349 INFO L225 Difference]: With dead ends: 1569 [2021-11-09 09:28:25,349 INFO L226 Difference]: Without dead ends: 1567 [2021-11-09 09:28:25,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 302 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34148 ImplicationChecksByTransitivity, 49.2s TimeCoverageRelationStatistics Valid=8219, Invalid=83893, Unknown=0, NotChecked=0, Total=92112 [2021-11-09 09:28:25,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2021-11-09 09:28:25,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 427. [2021-11-09 09:28:25,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 425 states have (on average 1.3811764705882352) internal successors, (587), 426 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:28:25,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 587 transitions. [2021-11-09 09:28:25,590 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 587 transitions. Word has length 45 [2021-11-09 09:28:25,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:28:25,591 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 587 transitions. [2021-11-09 09:28:25,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.5757575757575757) internal successors, (85), 33 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) [2021-11-09 09:28:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 587 transitions. [2021-11-09 09:28:25,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:28:25,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:28:25,593 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2021-11-09 09:28:25,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-09 09:28:25,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 09:28:25,818 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:28:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:28:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash 378187062, now seen corresponding path program 14 times [2021-11-09 09:28:25,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:28:25,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803661649] [2021-11-09 09:28:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:28:25,819 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:28:25,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:26,536 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 11 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:28:26,536 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:28:26,536 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803661649] [2021-11-09 09:28:26,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803661649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:26,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524574432] [2021-11-09 09:28:26,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-09 09:28:26,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:28:26,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:28:26,538 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:28:26,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-09 09:28:28,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-09 09:28:28,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:28:28,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 09:28:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:28:28,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:28:28,939 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:28:28,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 62 treesize of output 58 [2021-11-09 09:28:28,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:28,950 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:28:28,957 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:28:28,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 51 [2021-11-09 09:28:28,979 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:28:28,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 45 treesize of output 53 [2021-11-09 09:28:29,256 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:28:29,256 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 128 treesize of output 123 [2021-11-09 09:28:29,278 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:28:29,278 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 3 case distinctions, treesize of input 146 treesize of output 133 [2021-11-09 09:28:29,311 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:28:29,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 128 treesize of output 143 [2021-11-09 09:28:29,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 134 treesize of output 122 [2021-11-09 09:28:29,324 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:28:29,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 119 treesize of output 118 [2021-11-09 09:28:29,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:29,706 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:28:29,706 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 186 treesize of output 151 [2021-11-09 09:28:29,711 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:29,712 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:28:29,733 INFO L354 Elim1Store]: treesize reduction 120, result has 22.6 percent of original size [2021-11-09 09:28:29,734 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 3 case distinctions, treesize of input 218 treesize of output 201 [2021-11-09 09:28:29,750 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:28:29,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 198 treesize of output 182 [2021-11-09 09:28:29,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:28:29,787 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:28:29,788 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 3 case distinctions, treesize of input 156 treesize of output 162 [2021-11-09 09:28:31,359 INFO L354 Elim1Store]: treesize reduction 106, result has 12.4 percent of original size [2021-11-09 09:28:31,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 220 treesize of output 122 [2021-11-09 09:28:31,382 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:28:31,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 81 [2021-11-09 09:28:31,566 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-09 09:28:31,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 32 [2021-11-09 09:28:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:28:31,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524574432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:31,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:28:31,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 37 [2021-11-09 09:28:31,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157029047] [2021-11-09 09:28:31,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:28:31,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:28:31,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:28:31,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:28:31,616 INFO L87 Difference]: Start difference. First operand 427 states and 587 transitions. Second operand has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:28:57,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:28:57,727 INFO L93 Difference]: Finished difference Result 1332 states and 1596 transitions. [2021-11-09 09:28:57,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-09 09:28:57,728 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 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 45 [2021-11-09 09:28:57,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:28:57,732 INFO L225 Difference]: With dead ends: 1332 [2021-11-09 09:28:57,732 INFO L226 Difference]: Without dead ends: 1330 [2021-11-09 09:28:57,733 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5269 ImplicationChecksByTransitivity, 19.8s TimeCoverageRelationStatistics Valid=2281, Invalid=17459, Unknown=0, NotChecked=0, Total=19740 [2021-11-09 09:28:57,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1330 states. [2021-11-09 09:28:58,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1330 to 451. [2021-11-09 09:28:58,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 449 states have (on average 1.3919821826280623) internal successors, (625), 450 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:28:58,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 625 transitions. [2021-11-09 09:28:58,006 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 625 transitions. Word has length 45 [2021-11-09 09:28:58,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:28:58,006 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 625 transitions. [2021-11-09 09:28:58,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 37 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:28:58,006 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 625 transitions. [2021-11-09 09:28:58,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 09:28:58,008 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:28:58,008 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:28:58,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-09 09:28:58,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:28:58,229 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:28:58,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:28:58,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2004920820, now seen corresponding path program 15 times [2021-11-09 09:28:58,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:28:58,229 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518039530] [2021-11-09 09:28:58,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:28:58,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:28:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:28:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 9 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:28:58,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:28:58,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518039530] [2021-11-09 09:28:58,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518039530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:28:58,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102689054] [2021-11-09 09:28:58,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-09 09:28:58,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:28:58,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:28:58,983 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:28:58,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-09 09:29:01,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-09 09:29:01,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:01,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-09 09:29:01,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:01,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:29:01,919 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:29:01,931 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:29:01,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-09 09:29:01,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:29:01,950 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:29:01,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:29:02,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:02,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:29:02,140 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:29:02,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 132 treesize of output 124 [2021-11-09 09:29:02,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:02,161 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:29:02,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 93 [2021-11-09 09:29:02,193 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:29:02,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 106 treesize of output 121 [2021-11-09 09:29:02,200 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:02,209 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:29:02,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 101 [2021-11-09 09:29:02,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:02,759 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:29:02,760 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 159 treesize of output 140 [2021-11-09 09:29:02,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:02,766 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:29:02,789 INFO L354 Elim1Store]: treesize reduction 104, result has 23.0 percent of original size [2021-11-09 09:29:02,790 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 3 case distinctions, treesize of input 183 treesize of output 170 [2021-11-09 09:29:02,805 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:29:02,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 163 treesize of output 147 [2021-11-09 09:29:02,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:02,811 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:29:02,812 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 135 treesize of output 122 [2021-11-09 09:29:02,830 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:29:02,830 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 118 [2021-11-09 09:29:04,167 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-09 09:29:04,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 181 treesize of output 111 [2021-11-09 09:29:04,193 INFO L354 Elim1Store]: treesize reduction 94, result has 6.9 percent of original size [2021-11-09 09:29:04,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 82 treesize of output 70 [2021-11-09 09:29:04,403 INFO L354 Elim1Store]: treesize reduction 21, result has 16.0 percent of original size [2021-11-09 09:29:04,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 25 [2021-11-09 09:29:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 12 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:29:04,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102689054] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:04,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:04,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 17] total 33 [2021-11-09 09:29:04,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196932656] [2021-11-09 09:29:04,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-09 09:29:04,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:04,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-09 09:29:04,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:29:04,445 INFO L87 Difference]: Start difference. First operand 451 states and 625 transitions. Second operand has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:20,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:29:20,428 INFO L93 Difference]: Finished difference Result 782 states and 987 transitions. [2021-11-09 09:29:20,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-09 09:29:20,429 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-09 09:29:20,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:29:20,432 INFO L225 Difference]: With dead ends: 782 [2021-11-09 09:29:20,432 INFO L226 Difference]: Without dead ends: 780 [2021-11-09 09:29:20,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4662 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=3095, Invalid=13417, Unknown=0, NotChecked=0, Total=16512 [2021-11-09 09:29:20,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2021-11-09 09:29:20,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 78. [2021-11-09 09:29:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 76 states have (on average 1.1973684210526316) internal successors, (91), 77 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:20,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 91 transitions. [2021-11-09 09:29:20,480 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 91 transitions. Word has length 45 [2021-11-09 09:29:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:29:20,480 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 91 transitions. [2021-11-09 09:29:20,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.515151515151515) internal successors, (83), 33 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 91 transitions. [2021-11-09 09:29:20,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-09 09:29:20,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:29:20,481 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:29:20,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-09 09:29:20,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-09 09:29:20,681 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:29:20,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:29:20,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1083330574, now seen corresponding path program 6 times [2021-11-09 09:29:20,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:29:20,682 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110239301] [2021-11-09 09:29:20,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:29:20,682 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:29:20,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:21,181 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:29:21,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:29:21,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110239301] [2021-11-09 09:29:21,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110239301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:21,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199365072] [2021-11-09 09:29:21,182 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-09 09:29:21,182 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:21,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:29:21,183 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:29:21,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-09 09:29:23,901 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-09 09:29:23,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:23,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 09:29:23,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:23,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:29:23,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:29:23,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:29:24,039 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:29:24,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 71 treesize of output 74 [2021-11-09 09:29:24,051 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:29:24,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 57 treesize of output 60 [2021-11-09 09:29:24,064 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:29:24,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 50 treesize of output 58 [2021-11-09 09:29:24,248 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:29:24,248 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 100 [2021-11-09 09:29:24,274 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:29:24,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 117 treesize of output 132 [2021-11-09 09:29:24,279 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:29:24,280 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 123 treesize of output 114 [2021-11-09 09:29:24,297 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:29:24,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 108 treesize of output 110 [2021-11-09 09:29:24,575 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-09 09:29:24,575 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 149 treesize of output 120 [2021-11-09 09:29:24,581 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-09 09:29:24,581 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 3 case distinctions, treesize of input 179 treesize of output 173 [2021-11-09 09:29:24,593 INFO L354 Elim1Store]: treesize reduction 105, result has 13.2 percent of original size [2021-11-09 09:29:24,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 164 treesize of output 148 [2021-11-09 09:29:24,618 INFO L354 Elim1Store]: treesize reduction 192, result has 19.3 percent of original size [2021-11-09 09:29:24,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 141 [2021-11-09 09:29:25,925 INFO L354 Elim1Store]: treesize reduction 227, result has 8.8 percent of original size [2021-11-09 09:29:25,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 258 treesize of output 128 [2021-11-09 09:29:25,976 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-11-09 09:29:25,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 75 treesize of output 61 [2021-11-09 09:29:25,989 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 4 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:29:25,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199365072] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:25,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:25,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-11-09 09:29:25,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330025118] [2021-11-09 09:29:25,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-09 09:29:25,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:25,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-09 09:29:25,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-11-09 09:29:25,990 INFO L87 Difference]: Start difference. First operand 78 states and 91 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:33,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:29:33,287 INFO L93 Difference]: Finished difference Result 121 states and 139 transitions. [2021-11-09 09:29:33,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-09 09:29:33,287 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 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 48 [2021-11-09 09:29:33,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:29:33,288 INFO L225 Difference]: With dead ends: 121 [2021-11-09 09:29:33,288 INFO L226 Difference]: Without dead ends: 90 [2021-11-09 09:29:33,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=116, Invalid=940, Unknown=0, NotChecked=0, Total=1056 [2021-11-09 09:29:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-09 09:29:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-11-09 09:29:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 88 states have (on average 1.2045454545454546) internal successors, (106), 89 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 106 transitions. [2021-11-09 09:29:33,341 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 106 transitions. Word has length 48 [2021-11-09 09:29:33,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:29:33,341 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 106 transitions. [2021-11-09 09:29:33,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:33,342 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 106 transitions. [2021-11-09 09:29:33,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:29:33,342 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:29:33,342 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:29:33,379 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-09 09:29:33,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:33,544 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:29:33,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:29:33,545 INFO L85 PathProgramCache]: Analyzing trace with hash -520812551, now seen corresponding path program 7 times [2021-11-09 09:29:33,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:29:33,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499656267] [2021-11-09 09:29:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:29:33,545 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:29:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:35,413 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:29:35,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:29:35,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499656267] [2021-11-09 09:29:35,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499656267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:35,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138785146] [2021-11-09 09:29:35,413 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-09 09:29:35,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:35,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:29:35,414 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:29:35,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-09 09:29:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:37,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-09 09:29:37,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:37,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:29:38,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:29:38,148 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:29:38,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 45 [2021-11-09 09:29:38,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 31 [2021-11-09 09:29:38,165 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:29:38,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:29:38,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 122 treesize of output 102 [2021-11-09 09:29:38,361 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:29:38,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 107 treesize of output 98 [2021-11-09 09:29:38,374 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:29:38,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 120 treesize of output 112 [2021-11-09 09:29:38,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 102 treesize of output 90 [2021-11-09 09:29:38,388 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:29:38,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 87 treesize of output 86 [2021-11-09 09:29:38,412 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:29:38,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 83 treesize of output 98 [2021-11-09 09:29:38,704 INFO L354 Elim1Store]: treesize reduction 41, result has 26.8 percent of original size [2021-11-09 09:29:38,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 170 treesize of output 162 [2021-11-09 09:29:38,711 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 09:29:38,711 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 152 treesize of output 110 [2021-11-09 09:29:38,733 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:29:38,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 137 treesize of output 106 [2021-11-09 09:29:38,739 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:29:38,740 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 166 treesize of output 157 [2021-11-09 09:29:38,760 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:29:38,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 151 treesize of output 153 [2021-11-09 09:29:38,795 INFO L354 Elim1Store]: treesize reduction 218, result has 20.4 percent of original size [2021-11-09 09:29:38,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 147 treesize of output 169 [2021-11-09 09:29:39,235 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-09 09:29:39,235 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 220 treesize of output 151 [2021-11-09 09:29:39,254 INFO L354 Elim1Store]: treesize reduction 65, result has 26.1 percent of original size [2021-11-09 09:29:39,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 262 treesize of output 254 [2021-11-09 09:29:39,262 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-09 09:29:39,262 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 3 case distinctions, treesize of input 244 treesize of output 238 [2021-11-09 09:29:39,295 INFO L354 Elim1Store]: treesize reduction 192, result has 19.3 percent of original size [2021-11-09 09:29:39,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 229 treesize of output 234 [2021-11-09 09:29:39,313 INFO L354 Elim1Store]: treesize reduction 221, result has 8.3 percent of original size [2021-11-09 09:29:39,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 225 treesize of output 195 [2021-11-09 09:29:41,227 INFO L354 Elim1Store]: treesize reduction 215, result has 13.7 percent of original size [2021-11-09 09:29:41,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 306 treesize of output 148 [2021-11-09 09:29:41,274 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-11-09 09:29:41,274 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 95 treesize of output 81 [2021-11-09 09:29:41,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-09 09:29:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:29:41,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138785146] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:41,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:29:41,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 14] total 37 [2021-11-09 09:29:41,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37014229] [2021-11-09 09:29:41,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:29:41,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:29:41,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:29:41,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1243, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:29:41,340 INFO L87 Difference]: Start difference. First operand 90 states and 106 transitions. Second operand has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 37 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:53,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:29:53,509 INFO L93 Difference]: Finished difference Result 382 states and 432 transitions. [2021-11-09 09:29:53,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-09 09:29:53,510 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 37 states have internal predecessors, (103), 0 states have call successors, (0), 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 53 [2021-11-09 09:29:53,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:29:53,511 INFO L225 Difference]: With dead ends: 382 [2021-11-09 09:29:53,511 INFO L226 Difference]: Without dead ends: 380 [2021-11-09 09:29:53,512 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2097 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=1467, Invalid=7845, Unknown=0, NotChecked=0, Total=9312 [2021-11-09 09:29:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2021-11-09 09:29:53,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 212. [2021-11-09 09:29:53,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 210 states have (on average 1.2428571428571429) internal successors, (261), 211 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 261 transitions. [2021-11-09 09:29:53,700 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 261 transitions. Word has length 53 [2021-11-09 09:29:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:29:53,700 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 261 transitions. [2021-11-09 09:29:53,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7837837837837838) internal successors, (103), 37 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:29:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 261 transitions. [2021-11-09 09:29:53,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:29:53,701 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:29:53,701 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:29:53,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-09 09:29:53,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-09 09:29:53,919 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:29:53,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:29:53,919 INFO L85 PathProgramCache]: Analyzing trace with hash 336967353, now seen corresponding path program 4 times [2021-11-09 09:29:53,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:29:53,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116717504] [2021-11-09 09:29:53,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:29:53,919 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:29:53,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:29:55,092 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 4 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:29:55,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:29:55,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116717504] [2021-11-09 09:29:55,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116717504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:29:55,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465701866] [2021-11-09 09:29:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-09 09:29:55,093 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:29:55,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:29:55,094 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:29:55,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-09 09:29:57,601 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-09 09:29:57,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:29:57,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-09 09:29:57,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:29:57,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:29:57,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:29:57,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 49 [2021-11-09 09:29:57,751 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:29:57,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 50 treesize of output 42 [2021-11-09 09:29:57,766 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:29:57,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:29:57,943 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:29:57,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 122 treesize of output 114 [2021-11-09 09:29:57,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 104 treesize of output 84 [2021-11-09 09:29:57,961 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:29:57,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 89 treesize of output 80 [2021-11-09 09:29:57,990 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:29:57,990 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 117 [2021-11-09 09:29:58,005 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:29:58,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 96 treesize of output 99 [2021-11-09 09:29:58,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:58,324 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:29:58,325 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 166 treesize of output 139 [2021-11-09 09:29:58,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:58,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:29:58,342 INFO L354 Elim1Store]: treesize reduction 53, result has 26.4 percent of original size [2021-11-09 09:29:58,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 190 treesize of output 182 [2021-11-09 09:29:58,378 INFO L354 Elim1Store]: treesize reduction 218, result has 20.4 percent of original size [2021-11-09 09:29:58,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 170 treesize of output 192 [2021-11-09 09:29:58,383 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:58,386 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:29:58,386 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 180 treesize of output 167 [2021-11-09 09:29:58,404 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:29:58,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 163 [2021-11-09 09:29:58,786 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:58,819 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-09 09:29:58,820 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 223 treesize of output 166 [2021-11-09 09:29:58,825 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:58,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:29:58,849 INFO L354 Elim1Store]: treesize reduction 120, result has 22.6 percent of original size [2021-11-09 09:29:58,849 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 3 case distinctions, treesize of input 263 treesize of output 250 [2021-11-09 09:29:58,868 INFO L354 Elim1Store]: treesize reduction 221, result has 8.3 percent of original size [2021-11-09 09:29:58,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 243 treesize of output 213 [2021-11-09 09:29:58,875 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:29:58,904 INFO L354 Elim1Store]: treesize reduction 192, result has 19.3 percent of original size [2021-11-09 09:29:58,904 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 6 case distinctions, treesize of input 184 treesize of output 193 [2021-11-09 09:30:00,543 INFO L354 Elim1Store]: treesize reduction 219, result has 12.0 percent of original size [2021-11-09 09:30:00,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 292 treesize of output 158 [2021-11-09 09:30:00,586 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-11-09 09:30:00,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 105 treesize of output 91 [2021-11-09 09:30:00,724 INFO L354 Elim1Store]: treesize reduction 12, result has 52.0 percent of original size [2021-11-09 09:30:00,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 25 [2021-11-09 09:30:00,768 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 14 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:30:00,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465701866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:00,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:30:00,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 16] total 37 [2021-11-09 09:30:00,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787215779] [2021-11-09 09:30:00,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 09:30:00,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:30:00,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 09:30:00,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 09:30:00,769 INFO L87 Difference]: Start difference. First operand 212 states and 261 transitions. Second operand has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:11,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 09:30:11,949 INFO L93 Difference]: Finished difference Result 581 states and 663 transitions. [2021-11-09 09:30:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-09 09:30:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 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 53 [2021-11-09 09:30:11,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 09:30:11,952 INFO L225 Difference]: With dead ends: 581 [2021-11-09 09:30:11,952 INFO L226 Difference]: Without dead ends: 579 [2021-11-09 09:30:11,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2528 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1437, Invalid=8069, Unknown=0, NotChecked=0, Total=9506 [2021-11-09 09:30:11,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-11-09 09:30:12,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 306. [2021-11-09 09:30:12,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 304 states have (on average 1.269736842105263) internal successors, (386), 305 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:12,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 386 transitions. [2021-11-09 09:30:12,159 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 386 transitions. Word has length 53 [2021-11-09 09:30:12,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 09:30:12,159 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 386 transitions. [2021-11-09 09:30:12,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.810810810810811) internal successors, (104), 37 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-09 09:30:12,160 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 386 transitions. [2021-11-09 09:30:12,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-09 09:30:12,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 09:30:12,161 INFO L513 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 4, 4, 4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 09:30:12,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-09 09:30:12,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-09 09:30:12,380 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-09 09:30:12,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 09:30:12,381 INFO L85 PathProgramCache]: Analyzing trace with hash -61648779, now seen corresponding path program 5 times [2021-11-09 09:30:12,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 09:30:12,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084766886] [2021-11-09 09:30:12,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 09:30:12,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 09:30:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 09:30:13,516 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 88 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:30:13,516 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 09:30:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084766886] [2021-11-09 09:30:13,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084766886] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:13,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387160815] [2021-11-09 09:30:13,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-09 09:30:13,516 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 09:30:13,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 09:30:13,517 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 09:30:13,518 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b0796c7c-c84a-4059-9eb1-6e1189c708ec/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-09 09:30:16,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-09 09:30:16,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-09 09:30:16,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-09 09:30:16,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 09:30:16,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 09:30:16,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 51 [2021-11-09 09:30:16,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:30:16,597 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:30:16,605 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:30:16,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 44 [2021-11-09 09:30:16,619 INFO L354 Elim1Store]: treesize reduction 30, result has 37.5 percent of original size [2021-11-09 09:30:16,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 32 treesize of output 40 [2021-11-09 09:30:16,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 09:30:16,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:30:16,989 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-11-09 09:30:16,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 129 treesize of output 124 [2021-11-09 09:30:17,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:30:17,007 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:30:17,030 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:30:17,030 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 3 case distinctions, treesize of input 145 treesize of output 132 [2021-11-09 09:30:17,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:30:17,046 INFO L354 Elim1Store]: treesize reduction 29, result has 27.5 percent of original size [2021-11-09 09:30:17,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 111 treesize of output 114 [2021-11-09 09:30:17,075 INFO L354 Elim1Store]: treesize reduction 100, result has 25.9 percent of original size [2021-11-09 09:30:17,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 117 [2021-11-09 09:30:17,459 INFO L354 Elim1Store]: treesize reduction 132, result has 20.5 percent of original size [2021-11-09 09:30:17,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 174 [2021-11-09 09:30:17,483 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 09:30:17,483 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 3 new quantified variables, introduced 3 case distinctions, treesize of input 158 treesize of output 131 [2021-11-09 09:30:17,520 INFO L354 Elim1Store]: treesize reduction 218, result has 20.4 percent of original size [2021-11-09 09:30:17,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 192 treesize of output 214 [2021-11-09 09:30:17,526 INFO L354 Elim1Store]: treesize reduction 19, result has 5.0 percent of original size [2021-11-09 09:30:17,527 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 202 treesize of output 193 [2021-11-09 09:30:17,543 INFO L354 Elim1Store]: treesize reduction 88, result has 23.5 percent of original size [2021-11-09 09:30:17,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 187 treesize of output 189 [2021-11-09 09:30:17,890 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:30:17,921 INFO L354 Elim1Store]: treesize reduction 72, result has 23.4 percent of original size [2021-11-09 09:30:17,921 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 254 treesize of output 177 [2021-11-09 09:30:17,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:30:17,928 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 09:30:18,000 INFO L354 Elim1Store]: treesize reduction 252, result has 18.7 percent of original size [2021-11-09 09:30:18,000 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 6 case distinctions, treesize of input 302 treesize of output 272 [2021-11-09 09:30:18,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 09:30:18,007 INFO L354 Elim1Store]: treesize reduction 72, result has 1.4 percent of original size [2021-11-09 09:30:18,008 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 3 case distinctions, treesize of input 282 treesize of output 272 [2021-11-09 09:30:18,025 INFO L354 Elim1Store]: treesize reduction 221, result has 8.3 percent of original size [2021-11-09 09:30:18,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 263 treesize of output 233 [2021-11-09 09:30:18,050 INFO L354 Elim1Store]: treesize reduction 192, result has 19.3 percent of original size [2021-11-09 09:30:18,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 218 treesize of output 223 [2021-11-09 09:30:19,875 INFO L354 Elim1Store]: treesize reduction 227, result has 8.8 percent of original size [2021-11-09 09:30:19,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 14 new quantified variables, introduced 21 case distinctions, treesize of input 331 treesize of output 161 [2021-11-09 09:30:19,924 INFO L354 Elim1Store]: treesize reduction 207, result has 4.6 percent of original size [2021-11-09 09:30:19,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 108 treesize of output 94 [2021-11-09 09:30:20,059 INFO L354 Elim1Store]: treesize reduction 28, result has 42.9 percent of original size [2021-11-09 09:30:20,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 40 [2021-11-09 09:30:20,104 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 15 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 09:30:20,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387160815] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 09:30:20,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 09:30:20,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19] total 39 [2021-11-09 09:30:20,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668838918] [2021-11-09 09:30:20,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-09 09:30:20,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 09:30:20,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-09 09:30:20,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1366, Unknown=0, NotChecked=0, Total=1482 [2021-11-09 09:30:20,106 INFO L87 Difference]: Start difference. First operand 306 states and 386 transitions. Second operand has 39 states, 39 states have (on average 2.6153846153846154) internal successors, (102), 39 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)