./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/forester-heap/sll-optional-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/forester-heap/sll-optional-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8b0f1d623fff7bbdf74e6250d2f53fb98e44ca7ba1aae1265f5b0871b427fba0 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 22:54:07,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 22:54:07,675 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 22:54:07,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 22:54:07,744 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 22:54:07,749 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 22:54:07,751 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 22:54:07,755 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 22:54:07,758 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 22:54:07,764 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 22:54:07,765 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 22:54:07,767 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 22:54:07,768 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 22:54:07,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 22:54:07,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 22:54:07,778 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 22:54:07,780 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 22:54:07,781 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 22:54:07,783 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 22:54:07,791 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 22:54:07,793 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 22:54:07,795 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 22:54:07,798 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 22:54:07,799 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 22:54:07,808 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 22:54:07,809 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 22:54:07,809 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 22:54:07,812 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 22:54:07,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 22:54:07,814 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 22:54:07,814 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 22:54:07,815 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 22:54:07,817 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 22:54:07,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 22:54:07,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 22:54:07,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 22:54:07,821 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 22:54:07,821 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 22:54:07,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 22:54:07,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 22:54:07,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 22:54:07,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-02 22:54:07,865 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 22:54:07,866 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 22:54:07,866 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 22:54:07,867 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 22:54:07,868 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 22:54:07,868 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 22:54:07,868 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 22:54:07,869 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 22:54:07,869 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 22:54:07,869 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-02 22:54:07,870 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 22:54:07,871 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 22:54:07,871 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 22:54:07,871 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-02 22:54:07,871 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-02 22:54:07,872 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-02 22:54:07,872 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 22:54:07,872 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-02 22:54:07,872 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 22:54:07,872 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 22:54:07,873 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 22:54:07,873 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 22:54:07,873 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 22:54:07,873 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:54:07,874 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 22:54:07,874 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 22:54:07,874 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 22:54:07,874 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 22:54:07,875 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 22:54:07,876 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_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8b0f1d623fff7bbdf74e6250d2f53fb98e44ca7ba1aae1265f5b0871b427fba0 [2021-11-02 22:54:08,193 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 22:54:08,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 22:54:08,226 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 22:54:08,227 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 22:54:08,229 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 22:54:08,230 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/forester-heap/sll-optional-1.i [2021-11-02 22:54:08,324 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/data/ab245f65d/b472918bd2e34ee496587e535f8d7267/FLAGd103da166 [2021-11-02 22:54:09,027 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 22:54:09,027 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/sv-benchmarks/c/forester-heap/sll-optional-1.i [2021-11-02 22:54:09,048 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/data/ab245f65d/b472918bd2e34ee496587e535f8d7267/FLAGd103da166 [2021-11-02 22:54:09,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/data/ab245f65d/b472918bd2e34ee496587e535f8d7267 [2021-11-02 22:54:09,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 22:54:09,256 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-02 22:54:09,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 22:54:09,259 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 22:54:09,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 22:54:09,263 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:54:09" (1/1) ... [2021-11-02 22:54:09,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2e5766e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09, skipping insertion in model container [2021-11-02 22:54:09,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 10:54:09" (1/1) ... [2021-11-02 22:54:09,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 22:54:09,323 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 22:54:09,617 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_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/sv-benchmarks/c/forester-heap/sll-optional-1.i[22688,22701] [2021-11-02 22:54:09,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:54:09,634 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 22:54:09,680 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_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/sv-benchmarks/c/forester-heap/sll-optional-1.i[22688,22701] [2021-11-02 22:54:09,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 22:54:09,720 INFO L208 MainTranslator]: Completed translation [2021-11-02 22:54:09,721 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09 WrapperNode [2021-11-02 22:54:09,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 22:54:09,722 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 22:54:09,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 22:54:09,723 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 22:54:09,736 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09" (1/1) ... [2021-11-02 22:54:09,736 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09" (1/1) ... [2021-11-02 22:54:09,762 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09" (1/1) ... [2021-11-02 22:54:09,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09" (1/1) ... [2021-11-02 22:54:09,791 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09" (1/1) ... [2021-11-02 22:54:09,806 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09" (1/1) ... [2021-11-02 22:54:09,811 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09" (1/1) ... [2021-11-02 22:54:09,825 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 22:54:09,826 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 22:54:09,826 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 22:54:09,826 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 22:54:09,831 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09" (1/1) ... [2021-11-02 22:54:09,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 22:54:09,866 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:09,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 22:54:09,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 22:54:09,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-02 22:54:09,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 22:54:09,946 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-02 22:54:09,946 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-02 22:54:09,947 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-02 22:54:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-02 22:54:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-02 22:54:09,948 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-02 22:54:09,949 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-02 22:54:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-02 22:54:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-02 22:54:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-02 22:54:09,950 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-02 22:54:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-02 22:54:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-02 22:54:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-02 22:54:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-02 22:54:09,951 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-02 22:54:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-02 22:54:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-02 22:54:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-02 22:54:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-02 22:54:09,952 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-02 22:54:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-02 22:54:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-02 22:54:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-02 22:54:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-02 22:54:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-02 22:54:09,953 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-02 22:54:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-02 22:54:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-02 22:54:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-02 22:54:09,954 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-02 22:54:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-02 22:54:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-02 22:54:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-02 22:54:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-02 22:54:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-02 22:54:09,955 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-02 22:54:09,956 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-02 22:54:09,956 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-02 22:54:09,956 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-02 22:54:09,956 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-02 22:54:09,956 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-02 22:54:09,957 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-02 22:54:09,957 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-02 22:54:09,957 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-02 22:54:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-02 22:54:09,958 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-02 22:54:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-02 22:54:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-02 22:54:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-02 22:54:09,959 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-02 22:54:09,960 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-02 22:54:09,960 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-02 22:54:09,960 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-02 22:54:09,960 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-02 22:54:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-02 22:54:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2021-11-02 22:54:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-02 22:54:09,961 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-02 22:54:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-02 22:54:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-02 22:54:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-02 22:54:09,962 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-02 22:54:09,963 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-02 22:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-02 22:54:09,964 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-02 22:54:09,965 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-02 22:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-02 22:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-02 22:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-02 22:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-02 22:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-02 22:54:09,966 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-02 22:54:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-02 22:54:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-02 22:54:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-02 22:54:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-02 22:54:09,967 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-02 22:54:09,968 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-02 22:54:09,968 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-02 22:54:09,968 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-02 22:54:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-02 22:54:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-02 22:54:09,969 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-02 22:54:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-02 22:54:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-02 22:54:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-02 22:54:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-02 22:54:09,970 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-02 22:54:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-02 22:54:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-02 22:54:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-02 22:54:09,971 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-02 22:54:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-02 22:54:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-02 22:54:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-02 22:54:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-02 22:54:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-02 22:54:09,972 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-02 22:54:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-02 22:54:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-02 22:54:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-02 22:54:09,973 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-02 22:54:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-02 22:54:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-02 22:54:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-02 22:54:09,974 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-02 22:54:09,975 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-02 22:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-02 22:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-02 22:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 22:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-02 22:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-02 22:54:09,976 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-02 22:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-02 22:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-02 22:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-02 22:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-02 22:54:09,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-02 22:54:09,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 22:54:09,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 22:54:10,849 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 22:54:10,849 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-02 22:54:10,852 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:54:10 BoogieIcfgContainer [2021-11-02 22:54:10,852 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 22:54:10,854 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 22:54:10,857 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 22:54:10,862 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 22:54:10,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 10:54:09" (1/3) ... [2021-11-02 22:54:10,864 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb91ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:54:10, skipping insertion in model container [2021-11-02 22:54:10,865 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 10:54:09" (2/3) ... [2021-11-02 22:54:10,866 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fb91ce2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 10:54:10, skipping insertion in model container [2021-11-02 22:54:10,867 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 10:54:10" (3/3) ... [2021-11-02 22:54:10,869 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-optional-1.i [2021-11-02 22:54:10,880 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 22:54:10,885 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 66 error locations. [2021-11-02 22:54:10,950 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 22:54:10,960 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-11-02 22:54:10,960 INFO L340 AbstractCegarLoop]: Starting to check reachability of 66 error locations. [2021-11-02 22:54:10,990 INFO L276 IsEmpty]: Start isEmpty. Operand has 148 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 143 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-02 22:54:11,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:54:11,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:11,002 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:11,002 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:11,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1842897680, now seen corresponding path program 1 times [2021-11-02 22:54:11,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:11,024 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247403125] [2021-11-02 22:54:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:11,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:11,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:11,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:11,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:11,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:11,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247403125] [2021-11-02 22:54:11,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247403125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:11,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:11,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:54:11,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289653246] [2021-11-02 22:54:11,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:54:11,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:11,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:54:11,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:11,439 INFO L87 Difference]: Start difference. First operand has 148 states, 77 states have (on average 2.0779220779220777) internal successors, (160), 143 states have internal predecessors, (160), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:11,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:11,961 INFO L93 Difference]: Finished difference Result 149 states and 160 transitions. [2021-11-02 22:54:11,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:54:11,963 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-02 22:54:11,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:11,981 INFO L225 Difference]: With dead ends: 149 [2021-11-02 22:54:11,981 INFO L226 Difference]: Without dead ends: 145 [2021-11-02 22:54:11,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:12,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-11-02 22:54:12,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2021-11-02 22:54:12,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 79 states have (on average 1.8734177215189873) internal successors, (148), 135 states have internal predecessors, (148), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2021-11-02 22:54:12,059 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 7 [2021-11-02 22:54:12,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:12,060 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2021-11-02 22:54:12,060 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2021-11-02 22:54:12,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-11-02 22:54:12,061 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:12,061 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:12,061 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 22:54:12,062 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:12,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:12,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1842897681, now seen corresponding path program 1 times [2021-11-02 22:54:12,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:12,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677437705] [2021-11-02 22:54:12,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:12,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:12,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:12,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:12,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:12,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:12,160 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:12,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677437705] [2021-11-02 22:54:12,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677437705] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:12,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:12,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 22:54:12,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956254755] [2021-11-02 22:54:12,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:54:12,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:12,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:54:12,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:12,164 INFO L87 Difference]: Start difference. First operand 139 states and 151 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:12,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:12,560 INFO L93 Difference]: Finished difference Result 135 states and 147 transitions. [2021-11-02 22:54:12,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:54:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 7 [2021-11-02 22:54:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:12,563 INFO L225 Difference]: With dead ends: 135 [2021-11-02 22:54:12,563 INFO L226 Difference]: Without dead ends: 135 [2021-11-02 22:54:12,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:12,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-02 22:54:12,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 131. [2021-11-02 22:54:12,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 79 states have (on average 1.7721518987341771) internal successors, (140), 127 states have internal predecessors, (140), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:12,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 143 transitions. [2021-11-02 22:54:12,575 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 143 transitions. Word has length 7 [2021-11-02 22:54:12,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:12,576 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 143 transitions. [2021-11-02 22:54:12,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:12,576 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 143 transitions. [2021-11-02 22:54:12,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:54:12,577 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:12,577 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:12,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 22:54:12,578 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr8REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:12,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:12,579 INFO L85 PathProgramCache]: Analyzing trace with hash -272563940, now seen corresponding path program 1 times [2021-11-02 22:54:12,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:12,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493459937] [2021-11-02 22:54:12,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:12,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:12,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:12,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:12,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:12,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493459937] [2021-11-02 22:54:12,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493459937] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:12,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:12,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:54:12,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103268223] [2021-11-02 22:54:12,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:54:12,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:12,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:54:12,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:12,703 INFO L87 Difference]: Start difference. First operand 131 states and 143 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:13,145 INFO L93 Difference]: Finished difference Result 175 states and 192 transitions. [2021-11-02 22:54:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:54:13,146 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-02 22:54:13,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:13,148 INFO L225 Difference]: With dead ends: 175 [2021-11-02 22:54:13,148 INFO L226 Difference]: Without dead ends: 175 [2021-11-02 22:54:13,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:54:13,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-11-02 22:54:13,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 130. [2021-11-02 22:54:13,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 79 states have (on average 1.759493670886076) internal successors, (139), 126 states have internal predecessors, (139), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:13,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2021-11-02 22:54:13,159 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 15 [2021-11-02 22:54:13,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:13,160 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2021-11-02 22:54:13,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:13,160 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2021-11-02 22:54:13,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 22:54:13,161 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:13,161 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:13,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 22:54:13,161 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr9REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:13,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:13,162 INFO L85 PathProgramCache]: Analyzing trace with hash -272563939, now seen corresponding path program 1 times [2021-11-02 22:54:13,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:13,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305799523] [2021-11-02 22:54:13,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:13,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:13,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:13,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:13,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:13,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305799523] [2021-11-02 22:54:13,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305799523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:13,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:13,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:54:13,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22505723] [2021-11-02 22:54:13,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:54:13,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:13,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:54:13,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:13,366 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:13,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:13,787 INFO L93 Difference]: Finished difference Result 129 states and 141 transitions. [2021-11-02 22:54:13,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:54:13,789 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-11-02 22:54:13,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:13,790 INFO L225 Difference]: With dead ends: 129 [2021-11-02 22:54:13,791 INFO L226 Difference]: Without dead ends: 129 [2021-11-02 22:54:13,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:54:13,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-11-02 22:54:13,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2021-11-02 22:54:13,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 125 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 141 transitions. [2021-11-02 22:54:13,801 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 141 transitions. Word has length 15 [2021-11-02 22:54:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:13,802 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 141 transitions. [2021-11-02 22:54:13,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 141 transitions. [2021-11-02 22:54:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:54:13,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:13,816 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:13,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 22:54:13,816 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:13,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:13,817 INFO L85 PathProgramCache]: Analyzing trace with hash -108733717, now seen corresponding path program 1 times [2021-11-02 22:54:13,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:13,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498550831] [2021-11-02 22:54:13,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:13,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:13,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:13,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:13,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:13,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:13,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498550831] [2021-11-02 22:54:13,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498550831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:13,936 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:13,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:54:13,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347575265] [2021-11-02 22:54:13,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:54:13,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:13,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:54:13,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:13,939 INFO L87 Difference]: Start difference. First operand 129 states and 141 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:14,277 INFO L93 Difference]: Finished difference Result 131 states and 142 transitions. [2021-11-02 22:54:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:54:14,279 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 22:54:14,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:14,281 INFO L225 Difference]: With dead ends: 131 [2021-11-02 22:54:14,281 INFO L226 Difference]: Without dead ends: 131 [2021-11-02 22:54:14,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:14,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-11-02 22:54:14,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 122. [2021-11-02 22:54:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 85 states have (on average 1.6) internal successors, (136), 118 states have internal predecessors, (136), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:14,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 139 transitions. [2021-11-02 22:54:14,289 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 139 transitions. Word has length 16 [2021-11-02 22:54:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:14,290 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 139 transitions. [2021-11-02 22:54:14,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 139 transitions. [2021-11-02 22:54:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 22:54:14,291 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:14,291 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:14,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 22:54:14,298 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:14,298 INFO L85 PathProgramCache]: Analyzing trace with hash -108733716, now seen corresponding path program 1 times [2021-11-02 22:54:14,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:14,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399698137] [2021-11-02 22:54:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:14,299 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:14,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:14,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:14,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:14,535 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:14,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399698137] [2021-11-02 22:54:14,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399698137] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:14,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:14,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:54:14,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791702253] [2021-11-02 22:54:14,537 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:54:14,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:14,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:54:14,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:54:14,539 INFO L87 Difference]: Start difference. First operand 122 states and 139 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:15,004 INFO L93 Difference]: Finished difference Result 154 states and 172 transitions. [2021-11-02 22:54:15,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:54:15,009 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-11-02 22:54:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:15,010 INFO L225 Difference]: With dead ends: 154 [2021-11-02 22:54:15,010 INFO L226 Difference]: Without dead ends: 154 [2021-11-02 22:54:15,011 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:54:15,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-02 22:54:15,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 143. [2021-11-02 22:54:15,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 106 states have (on average 1.528301886792453) internal successors, (162), 139 states have internal predecessors, (162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:15,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 165 transitions. [2021-11-02 22:54:15,021 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 165 transitions. Word has length 16 [2021-11-02 22:54:15,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:15,021 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 165 transitions. [2021-11-02 22:54:15,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 165 transitions. [2021-11-02 22:54:15,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:54:15,023 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:15,023 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:15,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-02 22:54:15,024 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr22REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:15,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:15,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1534567763, now seen corresponding path program 1 times [2021-11-02 22:54:15,024 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:15,025 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612647080] [2021-11-02 22:54:15,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:15,025 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:15,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:15,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:15,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:15,125 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:15,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:15,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612647080] [2021-11-02 22:54:15,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612647080] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:15,127 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:15,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:54:15,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139711288] [2021-11-02 22:54:15,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:54:15,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:15,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:54:15,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:54:15,132 INFO L87 Difference]: Start difference. First operand 143 states and 165 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:15,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:15,523 INFO L93 Difference]: Finished difference Result 143 states and 165 transitions. [2021-11-02 22:54:15,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 22:54:15,523 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-02 22:54:15,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:15,525 INFO L225 Difference]: With dead ends: 143 [2021-11-02 22:54:15,525 INFO L226 Difference]: Without dead ends: 143 [2021-11-02 22:54:15,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:54:15,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2021-11-02 22:54:15,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2021-11-02 22:54:15,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 106 states have (on average 1.5188679245283019) internal successors, (161), 138 states have internal predecessors, (161), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:15,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 164 transitions. [2021-11-02 22:54:15,543 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 164 transitions. Word has length 20 [2021-11-02 22:54:15,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:15,544 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 164 transitions. [2021-11-02 22:54:15,544 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:15,545 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 164 transitions. [2021-11-02 22:54:15,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 22:54:15,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:15,548 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:15,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-02 22:54:15,548 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr23REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:15,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:15,549 INFO L85 PathProgramCache]: Analyzing trace with hash -1534567762, now seen corresponding path program 1 times [2021-11-02 22:54:15,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:15,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475256804] [2021-11-02 22:54:15,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:15,550 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:15,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:15,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:15,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:15,726 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475256804] [2021-11-02 22:54:15,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475256804] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:15,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:15,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-02 22:54:15,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911316717] [2021-11-02 22:54:15,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 22:54:15,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:15,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 22:54:15,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 22:54:15,729 INFO L87 Difference]: Start difference. First operand 142 states and 164 transitions. Second operand has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:16,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:16,185 INFO L93 Difference]: Finished difference Result 134 states and 156 transitions. [2021-11-02 22:54:16,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 22:54:16,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-02 22:54:16,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:16,187 INFO L225 Difference]: With dead ends: 134 [2021-11-02 22:54:16,188 INFO L226 Difference]: Without dead ends: 134 [2021-11-02 22:54:16,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:54:16,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-02 22:54:16,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 127. [2021-11-02 22:54:16,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 101 states have (on average 1.4356435643564356) internal successors, (145), 123 states have internal predecessors, (145), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:16,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 148 transitions. [2021-11-02 22:54:16,196 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 148 transitions. Word has length 20 [2021-11-02 22:54:16,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:16,197 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 148 transitions. [2021-11-02 22:54:16,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.8333333333333335) internal successors, (17), 6 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:16,197 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 148 transitions. [2021-11-02 22:54:16,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 22:54:16,199 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:16,199 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:16,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-02 22:54:16,200 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr65ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:16,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:16,200 INFO L85 PathProgramCache]: Analyzing trace with hash -528190557, now seen corresponding path program 1 times [2021-11-02 22:54:16,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:16,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315994679] [2021-11-02 22:54:16,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:16,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:16,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:16,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:16,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315994679] [2021-11-02 22:54:16,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1315994679] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:16,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:16,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:54:16,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510621597] [2021-11-02 22:54:16,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:54:16,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:16,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:54:16,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:16,296 INFO L87 Difference]: Start difference. First operand 127 states and 148 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:16,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:16,548 INFO L93 Difference]: Finished difference Result 161 states and 181 transitions. [2021-11-02 22:54:16,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:54:16,549 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2021-11-02 22:54:16,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:16,551 INFO L225 Difference]: With dead ends: 161 [2021-11-02 22:54:16,551 INFO L226 Difference]: Without dead ends: 161 [2021-11-02 22:54:16,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:16,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-02 22:54:16,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 127. [2021-11-02 22:54:16,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 101 states have (on average 1.4158415841584158) internal successors, (143), 123 states have internal predecessors, (143), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:16,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 146 transitions. [2021-11-02 22:54:16,558 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 146 transitions. Word has length 21 [2021-11-02 22:54:16,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:16,559 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 146 transitions. [2021-11-02 22:54:16,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:16,560 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 146 transitions. [2021-11-02 22:54:16,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 22:54:16,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:16,561 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:16,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-02 22:54:16,562 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:16,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:16,563 INFO L85 PathProgramCache]: Analyzing trace with hash 376244757, now seen corresponding path program 1 times [2021-11-02 22:54:16,563 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:16,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055687689] [2021-11-02 22:54:16,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:16,564 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:16,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:16,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:16,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:16,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:16,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055687689] [2021-11-02 22:54:16,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055687689] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:16,630 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:16,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:54:16,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950632975] [2021-11-02 22:54:16,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:54:16,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:54:16,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:16,632 INFO L87 Difference]: Start difference. First operand 127 states and 146 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:16,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:16,829 INFO L93 Difference]: Finished difference Result 153 states and 180 transitions. [2021-11-02 22:54:16,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:54:16,830 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-11-02 22:54:16,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:16,832 INFO L225 Difference]: With dead ends: 153 [2021-11-02 22:54:16,832 INFO L226 Difference]: Without dead ends: 153 [2021-11-02 22:54:16,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:16,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-02 22:54:16,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 131. [2021-11-02 22:54:16,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 105 states have (on average 1.4) internal successors, (147), 127 states have internal predecessors, (147), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:16,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2021-11-02 22:54:16,850 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 24 [2021-11-02 22:54:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:16,850 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2021-11-02 22:54:16,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:16,851 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2021-11-02 22:54:16,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:54:16,853 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:16,853 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:16,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-02 22:54:16,853 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:16,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:16,854 INFO L85 PathProgramCache]: Analyzing trace with hash -443084142, now seen corresponding path program 1 times [2021-11-02 22:54:16,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:16,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180349010] [2021-11-02 22:54:16,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:16,856 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:16,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:17,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:17,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:17,050 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:17,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180349010] [2021-11-02 22:54:17,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180349010] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:17,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:17,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:54:17,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454944040] [2021-11-02 22:54:17,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:54:17,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:17,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:54:17,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:54:17,054 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:17,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:17,689 INFO L93 Difference]: Finished difference Result 242 states and 280 transitions. [2021-11-02 22:54:17,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:54:17,690 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-02 22:54:17,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:17,695 INFO L225 Difference]: With dead ends: 242 [2021-11-02 22:54:17,695 INFO L226 Difference]: Without dead ends: 242 [2021-11-02 22:54:17,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:54:17,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-02 22:54:17,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 188. [2021-11-02 22:54:17,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 162 states have (on average 1.4135802469135803) internal successors, (229), 184 states have internal predecessors, (229), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:17,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 232 transitions. [2021-11-02 22:54:17,707 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 232 transitions. Word has length 26 [2021-11-02 22:54:17,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:17,708 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 232 transitions. [2021-11-02 22:54:17,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:17,708 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 232 transitions. [2021-11-02 22:54:17,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:54:17,710 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:17,710 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:17,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-02 22:54:17,711 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:17,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:17,715 INFO L85 PathProgramCache]: Analyzing trace with hash -443084141, now seen corresponding path program 1 times [2021-11-02 22:54:17,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:17,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947737360] [2021-11-02 22:54:17,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:17,716 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:17,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:17,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:17,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:17,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:17,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947737360] [2021-11-02 22:54:17,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947737360] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:17,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:17,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:54:17,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257746262] [2021-11-02 22:54:17,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:54:17,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:17,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:54:17,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:54:17,883 INFO L87 Difference]: Start difference. First operand 188 states and 232 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:18,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:18,488 INFO L93 Difference]: Finished difference Result 260 states and 303 transitions. [2021-11-02 22:54:18,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:54:18,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-02 22:54:18,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:18,491 INFO L225 Difference]: With dead ends: 260 [2021-11-02 22:54:18,491 INFO L226 Difference]: Without dead ends: 260 [2021-11-02 22:54:18,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:54:18,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-02 22:54:18,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 183. [2021-11-02 22:54:18,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 157 states have (on average 1.414012738853503) internal successors, (222), 179 states have internal predecessors, (222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:18,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 225 transitions. [2021-11-02 22:54:18,501 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 225 transitions. Word has length 26 [2021-11-02 22:54:18,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:18,501 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 225 transitions. [2021-11-02 22:54:18,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:18,502 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 225 transitions. [2021-11-02 22:54:18,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 22:54:18,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:18,503 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:18,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-02 22:54:18,504 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:18,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:18,504 INFO L85 PathProgramCache]: Analyzing trace with hash 802582302, now seen corresponding path program 1 times [2021-11-02 22:54:18,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:18,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896935925] [2021-11-02 22:54:18,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:18,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:18,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:18,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:18,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:18,557 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:18,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896935925] [2021-11-02 22:54:18,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896935925] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:18,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:18,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:54:18,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636785872] [2021-11-02 22:54:18,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 22:54:18,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:18,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 22:54:18,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:18,560 INFO L87 Difference]: Start difference. First operand 183 states and 225 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:18,724 INFO L93 Difference]: Finished difference Result 187 states and 229 transitions. [2021-11-02 22:54:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 22:54:18,725 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-11-02 22:54:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:18,727 INFO L225 Difference]: With dead ends: 187 [2021-11-02 22:54:18,727 INFO L226 Difference]: Without dead ends: 187 [2021-11-02 22:54:18,727 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 22:54:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-11-02 22:54:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2021-11-02 22:54:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 161 states have (on average 1.4037267080745341) internal successors, (226), 183 states have internal predecessors, (226), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:18,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 229 transitions. [2021-11-02 22:54:18,734 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 229 transitions. Word has length 26 [2021-11-02 22:54:18,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:18,735 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 229 transitions. [2021-11-02 22:54:18,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:18,735 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 229 transitions. [2021-11-02 22:54:18,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:54:18,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:18,737 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:18,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-02 22:54:18,737 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1810881917, now seen corresponding path program 1 times [2021-11-02 22:54:18,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:18,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752175206] [2021-11-02 22:54:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:18,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:18,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:18,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:18,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:18,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752175206] [2021-11-02 22:54:18,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752175206] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:18,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:18,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-02 22:54:18,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382322945] [2021-11-02 22:54:18,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-02 22:54:18,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:18,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-02 22:54:18,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:54:18,886 INFO L87 Difference]: Start difference. First operand 187 states and 229 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:19,422 INFO L93 Difference]: Finished difference Result 218 states and 246 transitions. [2021-11-02 22:54:19,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:54:19,423 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-02 22:54:19,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:19,425 INFO L225 Difference]: With dead ends: 218 [2021-11-02 22:54:19,425 INFO L226 Difference]: Without dead ends: 218 [2021-11-02 22:54:19,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-11-02 22:54:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-02 22:54:19,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 186. [2021-11-02 22:54:19,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 160 states have (on average 1.4) internal successors, (224), 182 states have internal predecessors, (224), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:19,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 227 transitions. [2021-11-02 22:54:19,439 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 227 transitions. Word has length 28 [2021-11-02 22:54:19,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:19,439 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 227 transitions. [2021-11-02 22:54:19,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:19,440 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 227 transitions. [2021-11-02 22:54:19,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:54:19,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:19,441 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:19,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-02 22:54:19,442 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr30REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:19,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1013597639, now seen corresponding path program 1 times [2021-11-02 22:54:19,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:19,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695044222] [2021-11-02 22:54:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:19,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:19,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:19,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:19,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:19,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:19,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695044222] [2021-11-02 22:54:19,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695044222] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:19,551 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:19,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:54:19,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172596258] [2021-11-02 22:54:19,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:54:19,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:19,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:54:19,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:19,554 INFO L87 Difference]: Start difference. First operand 186 states and 227 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:19,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:19,841 INFO L93 Difference]: Finished difference Result 192 states and 234 transitions. [2021-11-02 22:54:19,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:54:19,841 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-02 22:54:19,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:19,842 INFO L225 Difference]: With dead ends: 192 [2021-11-02 22:54:19,842 INFO L226 Difference]: Without dead ends: 192 [2021-11-02 22:54:19,843 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:54:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-02 22:54:19,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 185. [2021-11-02 22:54:19,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 160 states have (on average 1.39375) internal successors, (223), 181 states have internal predecessors, (223), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:19,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 226 transitions. [2021-11-02 22:54:19,849 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 226 transitions. Word has length 28 [2021-11-02 22:54:19,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:19,850 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 226 transitions. [2021-11-02 22:54:19,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:19,850 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 226 transitions. [2021-11-02 22:54:19,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 22:54:19,851 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:19,851 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:19,852 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-02 22:54:19,852 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr31REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:19,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:19,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1013597638, now seen corresponding path program 1 times [2021-11-02 22:54:19,853 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:19,853 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104959928] [2021-11-02 22:54:19,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:19,853 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:19,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:19,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:19,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:19,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:19,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104959928] [2021-11-02 22:54:19,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104959928] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:19,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:19,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:54:19,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490950351] [2021-11-02 22:54:19,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 22:54:19,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:19,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 22:54:19,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:19,954 INFO L87 Difference]: Start difference. First operand 185 states and 226 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:20,238 INFO L93 Difference]: Finished difference Result 184 states and 225 transitions. [2021-11-02 22:54:20,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-02 22:54:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-02 22:54:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:20,239 INFO L225 Difference]: With dead ends: 184 [2021-11-02 22:54:20,240 INFO L226 Difference]: Without dead ends: 184 [2021-11-02 22:54:20,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-02 22:54:20,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-02 22:54:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2021-11-02 22:54:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 160 states have (on average 1.3875) internal successors, (222), 180 states have internal predecessors, (222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:20,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 225 transitions. [2021-11-02 22:54:20,247 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 225 transitions. Word has length 28 [2021-11-02 22:54:20,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:20,248 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 225 transitions. [2021-11-02 22:54:20,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:20,248 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 225 transitions. [2021-11-02 22:54:20,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:54:20,249 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:20,249 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:20,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-02 22:54:20,250 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:20,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:20,250 INFO L85 PathProgramCache]: Analyzing trace with hash 1497884946, now seen corresponding path program 1 times [2021-11-02 22:54:20,251 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:20,251 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268229758] [2021-11-02 22:54:20,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:20,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:20,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:20,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:20,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:20,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268229758] [2021-11-02 22:54:20,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268229758] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:20,466 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:20,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:54:20,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232954241] [2021-11-02 22:54:20,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 22:54:20,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:20,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 22:54:20,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 22:54:20,468 INFO L87 Difference]: Start difference. First operand 184 states and 225 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:21,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:21,284 INFO L93 Difference]: Finished difference Result 319 states and 369 transitions. [2021-11-02 22:54:21,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:54:21,284 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-02 22:54:21,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:21,287 INFO L225 Difference]: With dead ends: 319 [2021-11-02 22:54:21,287 INFO L226 Difference]: Without dead ends: 319 [2021-11-02 22:54:21,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:54:21,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-11-02 22:54:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 197. [2021-11-02 22:54:21,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 173 states have (on average 1.3815028901734103) internal successors, (239), 193 states have internal predecessors, (239), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:21,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 242 transitions. [2021-11-02 22:54:21,300 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 242 transitions. Word has length 30 [2021-11-02 22:54:21,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:21,301 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 242 transitions. [2021-11-02 22:54:21,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:21,301 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 242 transitions. [2021-11-02 22:54:21,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:54:21,303 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:21,303 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:21,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-02 22:54:21,303 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:21,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1497884947, now seen corresponding path program 1 times [2021-11-02 22:54:21,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:21,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030039664] [2021-11-02 22:54:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:21,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:21,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:21,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:21,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:21,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:21,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030039664] [2021-11-02 22:54:21,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030039664] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:21,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:21,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 22:54:21,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984776652] [2021-11-02 22:54:21,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:54:21,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:21,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:54:21,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:54:21,752 INFO L87 Difference]: Start difference. First operand 197 states and 242 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:22,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:22,901 INFO L93 Difference]: Finished difference Result 302 states and 349 transitions. [2021-11-02 22:54:22,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 22:54:22,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-02 22:54:22,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:22,904 INFO L225 Difference]: With dead ends: 302 [2021-11-02 22:54:22,904 INFO L226 Difference]: Without dead ends: 302 [2021-11-02 22:54:22,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=418, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:54:22,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-11-02 22:54:22,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 205. [2021-11-02 22:54:22,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 181 states have (on average 1.3701657458563536) internal successors, (248), 201 states have internal predecessors, (248), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:22,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 251 transitions. [2021-11-02 22:54:22,914 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 251 transitions. Word has length 30 [2021-11-02 22:54:22,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:22,914 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 251 transitions. [2021-11-02 22:54:22,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 12 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:22,915 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 251 transitions. [2021-11-02 22:54:22,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 22:54:22,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:22,916 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:22,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-02 22:54:22,916 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr40REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:22,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:22,917 INFO L85 PathProgramCache]: Analyzing trace with hash 2050601193, now seen corresponding path program 1 times [2021-11-02 22:54:22,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:22,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37283280] [2021-11-02 22:54:22,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:22,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:22,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:22,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:22,979 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:22,979 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37283280] [2021-11-02 22:54:22,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37283280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:22,980 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:22,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-02 22:54:22,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824540420] [2021-11-02 22:54:22,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:54:22,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:22,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:54:22,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:22,984 INFO L87 Difference]: Start difference. First operand 205 states and 251 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:23,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:23,189 INFO L93 Difference]: Finished difference Result 227 states and 277 transitions. [2021-11-02 22:54:23,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:54:23,190 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-11-02 22:54:23,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:23,192 INFO L225 Difference]: With dead ends: 227 [2021-11-02 22:54:23,192 INFO L226 Difference]: Without dead ends: 227 [2021-11-02 22:54:23,192 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:23,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2021-11-02 22:54:23,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 213. [2021-11-02 22:54:23,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 189 states have (on average 1.3492063492063493) internal successors, (255), 209 states have internal predecessors, (255), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:23,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 258 transitions. [2021-11-02 22:54:23,201 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 258 transitions. Word has length 30 [2021-11-02 22:54:23,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:23,201 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 258 transitions. [2021-11-02 22:54:23,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:23,201 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 258 transitions. [2021-11-02 22:54:23,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:54:23,202 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:23,202 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:23,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-02 22:54:23,203 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:23,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:23,204 INFO L85 PathProgramCache]: Analyzing trace with hash -555394813, now seen corresponding path program 1 times [2021-11-02 22:54:23,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:23,204 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652341074] [2021-11-02 22:54:23,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:23,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:23,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:23,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:23,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:23,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:23,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652341074] [2021-11-02 22:54:23,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652341074] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:23,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:23,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-02 22:54:23,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989708626] [2021-11-02 22:54:23,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:54:23,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:23,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:54:23,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-11-02 22:54:23,442 INFO L87 Difference]: Start difference. First operand 213 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:24,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:24,240 INFO L93 Difference]: Finished difference Result 285 states and 331 transitions. [2021-11-02 22:54:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:54:24,241 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-02 22:54:24,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:24,242 INFO L225 Difference]: With dead ends: 285 [2021-11-02 22:54:24,242 INFO L226 Difference]: Without dead ends: 285 [2021-11-02 22:54:24,243 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:54:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2021-11-02 22:54:24,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 211. [2021-11-02 22:54:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 187 states have (on average 1.3475935828877006) internal successors, (252), 207 states have internal predecessors, (252), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:24,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 255 transitions. [2021-11-02 22:54:24,250 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 255 transitions. Word has length 32 [2021-11-02 22:54:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:24,251 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 255 transitions. [2021-11-02 22:54:24,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.4166666666666665) internal successors, (29), 11 states have internal predecessors, (29), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 255 transitions. [2021-11-02 22:54:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 22:54:24,252 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:24,252 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:24,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-02 22:54:24,252 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr40REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:24,253 INFO L85 PathProgramCache]: Analyzing trace with hash -101635634, now seen corresponding path program 1 times [2021-11-02 22:54:24,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:24,253 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980313995] [2021-11-02 22:54:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:24,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:24,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:24,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:24,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:24,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980313995] [2021-11-02 22:54:24,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980313995] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:24,369 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022864022] [2021-11-02 22:54:24,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:24,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:24,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:24,375 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:24,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 22:54:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:24,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:54:24,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:24,696 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 [2021-11-02 22:54:24,705 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 [2021-11-02 22:54:24,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:24,840 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 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-02 22:54:24,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:24,856 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 27 treesize of output 11 [2021-11-02 22:54:24,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:24,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:54:24,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:24,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:54:25,333 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-02 22:54:25,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 49 treesize of output 40 [2021-11-02 22:54:25,357 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-11-02 22:54:25,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 31 treesize of output 22 [2021-11-02 22:54:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:25,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022864022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:25,382 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:54:25,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-11-02 22:54:25,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450845879] [2021-11-02 22:54:25,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:54:25,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:25,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:54:25,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:54:25,385 INFO L87 Difference]: Start difference. First operand 211 states and 255 transitions. Second operand has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:26,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:26,110 INFO L93 Difference]: Finished difference Result 217 states and 243 transitions. [2021-11-02 22:54:26,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:54:26,111 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-11-02 22:54:26,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:26,113 INFO L225 Difference]: With dead ends: 217 [2021-11-02 22:54:26,113 INFO L226 Difference]: Without dead ends: 217 [2021-11-02 22:54:26,114 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2021-11-02 22:54:26,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-11-02 22:54:26,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 189. [2021-11-02 22:54:26,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 165 states have (on average 1.3151515151515152) internal successors, (217), 185 states have internal predecessors, (217), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:26,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 220 transitions. [2021-11-02 22:54:26,122 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 220 transitions. Word has length 32 [2021-11-02 22:54:26,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:26,123 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 220 transitions. [2021-11-02 22:54:26,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:26,124 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 220 transitions. [2021-11-02 22:54:26,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-02 22:54:26,125 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:26,125 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:26,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:26,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-02 22:54:26,349 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:26,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash 540621568, now seen corresponding path program 1 times [2021-11-02 22:54:26,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:26,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725108698] [2021-11-02 22:54:26,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:26,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:26,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:26,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:26,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:26,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725108698] [2021-11-02 22:54:26,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725108698] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:26,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:26,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-02 22:54:26,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68443158] [2021-11-02 22:54:26,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:54:26,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:26,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:54:26,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:54:26,540 INFO L87 Difference]: Start difference. First operand 189 states and 220 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:27,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:27,059 INFO L93 Difference]: Finished difference Result 234 states and 268 transitions. [2021-11-02 22:54:27,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:54:27,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-11-02 22:54:27,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:27,063 INFO L225 Difference]: With dead ends: 234 [2021-11-02 22:54:27,064 INFO L226 Difference]: Without dead ends: 234 [2021-11-02 22:54:27,064 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-11-02 22:54:27,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-02 22:54:27,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 195. [2021-11-02 22:54:27,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 171 states have (on average 1.3099415204678362) internal successors, (224), 191 states have internal predecessors, (224), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 227 transitions. [2021-11-02 22:54:27,073 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 227 transitions. Word has length 34 [2021-11-02 22:54:27,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:27,073 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 227 transitions. [2021-11-02 22:54:27,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:27,074 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 227 transitions. [2021-11-02 22:54:27,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 22:54:27,075 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:27,075 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:27,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-11-02 22:54:27,076 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr56REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:27,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:27,076 INFO L85 PathProgramCache]: Analyzing trace with hash -422780464, now seen corresponding path program 1 times [2021-11-02 22:54:27,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:27,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926935619] [2021-11-02 22:54:27,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:27,077 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:27,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:27,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:27,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:27,161 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:54:27,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:27,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926935619] [2021-11-02 22:54:27,162 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926935619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:27,162 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:27,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:54:27,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105985536] [2021-11-02 22:54:27,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:54:27,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:27,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:54:27,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:27,164 INFO L87 Difference]: Start difference. First operand 195 states and 227 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:27,452 INFO L93 Difference]: Finished difference Result 224 states and 252 transitions. [2021-11-02 22:54:27,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:54:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-11-02 22:54:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:27,454 INFO L225 Difference]: With dead ends: 224 [2021-11-02 22:54:27,454 INFO L226 Difference]: Without dead ends: 224 [2021-11-02 22:54:27,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:27,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-02 22:54:27,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 190. [2021-11-02 22:54:27,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 166 states have (on average 1.3012048192771084) internal successors, (216), 186 states have internal predecessors, (216), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:27,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 219 transitions. [2021-11-02 22:54:27,462 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 219 transitions. Word has length 36 [2021-11-02 22:54:27,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:27,463 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 219 transitions. [2021-11-02 22:54:27,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:27,463 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 219 transitions. [2021-11-02 22:54:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 22:54:27,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:27,464 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:27,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-11-02 22:54:27,464 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash -2091011663, now seen corresponding path program 1 times [2021-11-02 22:54:27,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:27,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805477335] [2021-11-02 22:54:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:27,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:27,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:27,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:27,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:27,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:27,716 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805477335] [2021-11-02 22:54:27,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805477335] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:27,716 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:27,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-02 22:54:27,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647920725] [2021-11-02 22:54:27,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 22:54:27,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:27,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 22:54:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-02 22:54:27,718 INFO L87 Difference]: Start difference. First operand 190 states and 219 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:28,550 INFO L93 Difference]: Finished difference Result 228 states and 254 transitions. [2021-11-02 22:54:28,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:54:28,550 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-11-02 22:54:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:28,552 INFO L225 Difference]: With dead ends: 228 [2021-11-02 22:54:28,552 INFO L226 Difference]: Without dead ends: 228 [2021-11-02 22:54:28,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:54:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-02 22:54:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 187. [2021-11-02 22:54:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 163 states have (on average 1.294478527607362) internal successors, (211), 183 states have internal predecessors, (211), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 214 transitions. [2021-11-02 22:54:28,559 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 214 transitions. Word has length 37 [2021-11-02 22:54:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:28,560 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 214 transitions. [2021-11-02 22:54:28,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 214 transitions. [2021-11-02 22:54:28,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:54:28,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:28,561 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:28,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-11-02 22:54:28,562 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:28,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:28,562 INFO L85 PathProgramCache]: Analyzing trace with hash -688356226, now seen corresponding path program 1 times [2021-11-02 22:54:28,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:28,563 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10210960] [2021-11-02 22:54:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:28,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:28,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:28,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:28,947 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:28,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10210960] [2021-11-02 22:54:28,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10210960] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:28,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377519833] [2021-11-02 22:54:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:28,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:28,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:28,960 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:28,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 22:54:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:29,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:54:29,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:29,160 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 [2021-11-02 22:54:29,206 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:54:29,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:29,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 22:54:29,380 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:54:29,380 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 11 treesize of output 11 [2021-11-02 22:54:29,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:29,454 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 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 22:54:29,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-02 22:54:29,559 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 11 [2021-11-02 22:54:29,658 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 25 treesize of output 13 [2021-11-02 22:54:29,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:54:29,796 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-02 22:54:29,797 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 42 treesize of output 29 [2021-11-02 22:54:29,921 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.base, main_~x~0.offset] [2021-11-02 22:54:29,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:54:29,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:54:29,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695618688] [2021-11-02 22:54:29,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:54:29,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:29,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:54:29,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=523, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:54:29,924 INFO L87 Difference]: Start difference. First operand 187 states and 214 transitions. Second operand has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:31,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:31,072 INFO L93 Difference]: Finished difference Result 347 states and 388 transitions. [2021-11-02 22:54:31,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:54:31,073 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-02 22:54:31,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:31,076 INFO L225 Difference]: With dead ends: 347 [2021-11-02 22:54:31,076 INFO L226 Difference]: Without dead ends: 347 [2021-11-02 22:54:31,077 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=1305, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 22:54:31,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-02 22:54:31,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 212. [2021-11-02 22:54:31,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 188 states have (on average 1.2872340425531914) internal successors, (242), 208 states have internal predecessors, (242), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:31,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 245 transitions. [2021-11-02 22:54:31,085 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 245 transitions. Word has length 38 [2021-11-02 22:54:31,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:31,085 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 245 transitions. [2021-11-02 22:54:31,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:31,086 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 245 transitions. [2021-11-02 22:54:31,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 22:54:31,086 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:31,087 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:31,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:31,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 22:54:31,316 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:31,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:31,316 INFO L85 PathProgramCache]: Analyzing trace with hash -688356225, now seen corresponding path program 1 times [2021-11-02 22:54:31,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:31,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092961657] [2021-11-02 22:54:31,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:31,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:31,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:31,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:31,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:31,805 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:31,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092961657] [2021-11-02 22:54:31,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092961657] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:31,806 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464449430] [2021-11-02 22:54:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:31,806 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:31,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:31,820 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:31,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 22:54:32,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:32,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 22:54:32,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:32,047 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 [2021-11-02 22:54:32,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:54:32,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:54:32,242 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:54:32,243 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 11 treesize of output 11 [2021-11-02 22:54:32,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:32,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:54:32,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:32,346 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 25 treesize of output 24 [2021-11-02 22:54:32,717 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:54:32,718 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 66 treesize of output 64 [2021-11-02 22:54:32,741 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:54:32,742 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 58 treesize of output 60 [2021-11-02 22:54:33,012 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:54:33,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 78 [2021-11-02 22:54:33,029 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:54:33,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 59 [2021-11-02 22:54:33,132 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-02 22:54:33,132 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 105 treesize of output 85 [2021-11-02 22:54:33,175 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-11-02 22:54:33,176 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 97 treesize of output 98 [2021-11-02 22:54:38,206 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:54:38,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:54:38,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:54:38,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666446040] [2021-11-02 22:54:38,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:54:38,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:38,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:54:38,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=457, Unknown=4, NotChecked=0, Total=552 [2021-11-02 22:54:38,209 INFO L87 Difference]: Start difference. First operand 212 states and 245 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:39,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:39,925 INFO L93 Difference]: Finished difference Result 347 states and 384 transitions. [2021-11-02 22:54:39,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 22:54:39,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-02 22:54:39,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:39,927 INFO L225 Difference]: With dead ends: 347 [2021-11-02 22:54:39,928 INFO L226 Difference]: Without dead ends: 347 [2021-11-02 22:54:39,929 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=433, Invalid=1915, Unknown=4, NotChecked=0, Total=2352 [2021-11-02 22:54:39,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-02 22:54:39,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 210. [2021-11-02 22:54:39,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 186 states have (on average 1.2795698924731183) internal successors, (238), 206 states have internal predecessors, (238), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:39,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 241 transitions. [2021-11-02 22:54:39,939 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 241 transitions. Word has length 38 [2021-11-02 22:54:39,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:39,940 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 241 transitions. [2021-11-02 22:54:39,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 16 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:39,940 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 241 transitions. [2021-11-02 22:54:39,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:54:39,941 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:39,941 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:39,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:40,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 22:54:40,156 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr59ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:40,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:40,157 INFO L85 PathProgramCache]: Analyzing trace with hash 2086424134, now seen corresponding path program 1 times [2021-11-02 22:54:40,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:40,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450078535] [2021-11-02 22:54:40,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:40,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:40,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:40,473 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:40,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:40,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450078535] [2021-11-02 22:54:40,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450078535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:40,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871472416] [2021-11-02 22:54:40,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:40,474 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:40,475 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:40,492 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:40,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 22:54:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:40,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 22:54:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:41,262 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:54:41,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:54:41,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2021-11-02 22:54:41,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784852512] [2021-11-02 22:54:41,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 22:54:41,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:41,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 22:54:41,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-11-02 22:54:41,264 INFO L87 Difference]: Start difference. First operand 210 states and 241 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:41,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:41,766 INFO L93 Difference]: Finished difference Result 291 states and 321 transitions. [2021-11-02 22:54:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 22:54:41,767 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-11-02 22:54:41,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:41,769 INFO L225 Difference]: With dead ends: 291 [2021-11-02 22:54:41,770 INFO L226 Difference]: Without dead ends: 291 [2021-11-02 22:54:41,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:54:41,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-11-02 22:54:41,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 258. [2021-11-02 22:54:41,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 234 states have (on average 1.2863247863247864) internal successors, (301), 254 states have internal predecessors, (301), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:41,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 304 transitions. [2021-11-02 22:54:41,780 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 304 transitions. Word has length 39 [2021-11-02 22:54:41,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:41,781 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 304 transitions. [2021-11-02 22:54:41,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:41,781 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 304 transitions. [2021-11-02 22:54:41,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 22:54:41,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:41,782 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:41,836 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:42,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 22:54:42,008 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr63ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:42,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2086435119, now seen corresponding path program 1 times [2021-11-02 22:54:42,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:42,008 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367117919] [2021-11-02 22:54:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:42,009 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:42,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:54:42,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:42,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367117919] [2021-11-02 22:54:42,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367117919] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:54:42,072 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:54:42,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 22:54:42,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876704574] [2021-11-02 22:54:42,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 22:54:42,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:42,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 22:54:42,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 22:54:42,074 INFO L87 Difference]: Start difference. First operand 258 states and 304 transitions. Second operand has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:42,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:42,275 INFO L93 Difference]: Finished difference Result 273 states and 313 transitions. [2021-11-02 22:54:42,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 22:54:42,276 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2021-11-02 22:54:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:42,277 INFO L225 Difference]: With dead ends: 273 [2021-11-02 22:54:42,277 INFO L226 Difference]: Without dead ends: 273 [2021-11-02 22:54:42,278 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 22:54:42,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-11-02 22:54:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 260. [2021-11-02 22:54:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 236 states have (on average 1.2838983050847457) internal successors, (303), 256 states have internal predecessors, (303), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:42,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 306 transitions. [2021-11-02 22:54:42,285 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 306 transitions. Word has length 39 [2021-11-02 22:54:42,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:42,286 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 306 transitions. [2021-11-02 22:54:42,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:42,286 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 306 transitions. [2021-11-02 22:54:42,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 22:54:42,287 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:42,287 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:42,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-02 22:54:42,288 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:42,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1294153361, now seen corresponding path program 1 times [2021-11-02 22:54:42,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:42,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217817551] [2021-11-02 22:54:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:42,289 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:42,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:42,778 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:42,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:42,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217817551] [2021-11-02 22:54:42,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217817551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:42,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642064666] [2021-11-02 22:54:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:42,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:42,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:42,782 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:42,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 22:54:43,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:43,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 22:54:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:43,106 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 [2021-11-02 22:54:43,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:54:43,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:54:43,276 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:54:43,277 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 11 treesize of output 11 [2021-11-02 22:54:43,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:43,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:54:43,396 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:54:43,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-02 22:54:43,700 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:54:43,701 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 68 treesize of output 70 [2021-11-02 22:54:43,726 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:54:43,727 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 64 treesize of output 62 [2021-11-02 22:54:44,036 INFO L354 Elim1Store]: treesize reduction 136, result has 15.0 percent of original size [2021-11-02 22:54:44,037 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 98 treesize of output 88 [2021-11-02 22:54:44,070 INFO L354 Elim1Store]: treesize reduction 136, result has 15.0 percent of original size [2021-11-02 22:54:44,071 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 79 treesize of output 65 [2021-11-02 22:54:44,181 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-02 22:54:44,182 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 87 [2021-11-02 22:54:44,217 INFO L354 Elim1Store]: treesize reduction 146, result has 16.1 percent of original size [2021-11-02 22:54:44,218 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 99 treesize of output 100 [2021-11-02 22:54:46,835 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:54:46,835 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:54:46,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:54:46,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875749172] [2021-11-02 22:54:46,836 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:54:46,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:46,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:54:46,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=367, Unknown=5, NotChecked=0, Total=462 [2021-11-02 22:54:46,838 INFO L87 Difference]: Start difference. First operand 260 states and 306 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:47,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:47,982 INFO L93 Difference]: Finished difference Result 398 states and 461 transitions. [2021-11-02 22:54:47,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:54:47,983 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-11-02 22:54:47,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:47,985 INFO L225 Difference]: With dead ends: 398 [2021-11-02 22:54:47,986 INFO L226 Difference]: Without dead ends: 398 [2021-11-02 22:54:47,986 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=222, Invalid=895, Unknown=5, NotChecked=0, Total=1122 [2021-11-02 22:54:47,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2021-11-02 22:54:47,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 267. [2021-11-02 22:54:47,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 243 states have (on average 1.2757201646090535) internal successors, (310), 263 states have internal predecessors, (310), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:47,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 313 transitions. [2021-11-02 22:54:47,996 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 313 transitions. Word has length 40 [2021-11-02 22:54:47,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:47,997 INFO L470 AbstractCegarLoop]: Abstraction has 267 states and 313 transitions. [2021-11-02 22:54:47,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:47,997 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 313 transitions. [2021-11-02 22:54:47,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:54:47,998 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:47,999 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:48,040 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:48,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 22:54:48,224 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:48,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:48,224 INFO L85 PathProgramCache]: Analyzing trace with hash 194747134, now seen corresponding path program 1 times [2021-11-02 22:54:48,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:48,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126120329] [2021-11-02 22:54:48,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:48,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:48,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:48,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:48,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:48,696 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:48,696 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:48,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126120329] [2021-11-02 22:54:48,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126120329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:48,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54364864] [2021-11-02 22:54:48,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:48,697 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:48,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:48,698 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:48,698 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 22:54:48,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:48,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 22:54:48,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:49,013 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 [2021-11-02 22:54:49,072 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:54:49,073 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 17 treesize of output 21 [2021-11-02 22:54:49,126 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 23 treesize of output 19 [2021-11-02 22:54:49,221 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:54:49,221 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-02 22:54:49,425 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:54:49,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:54:49,549 INFO L354 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2021-11-02 22:54:49,549 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 65 treesize of output 58 [2021-11-02 22:54:50,474 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-02 22:54:50,475 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 75 treesize of output 68 [2021-11-02 22:54:51,342 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-11-02 22:54:51,343 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 62 [2021-11-02 22:54:51,613 INFO L354 Elim1Store]: treesize reduction 184, result has 14.4 percent of original size [2021-11-02 22:54:51,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 93 treesize of output 80 [2021-11-02 22:54:52,477 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:54:52,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:54:52,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:54:52,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238392310] [2021-11-02 22:54:52,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:54:52,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:54:52,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:54:52,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:54:52,480 INFO L87 Difference]: Start difference. First operand 267 states and 313 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:54,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:54:54,329 INFO L93 Difference]: Finished difference Result 553 states and 652 transitions. [2021-11-02 22:54:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 22:54:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-02 22:54:54,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:54:54,333 INFO L225 Difference]: With dead ends: 553 [2021-11-02 22:54:54,333 INFO L226 Difference]: Without dead ends: 553 [2021-11-02 22:54:54,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=545, Invalid=2425, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 22:54:54,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-11-02 22:54:54,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 292. [2021-11-02 22:54:54,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 268 states have (on average 1.2723880597014925) internal successors, (341), 288 states have internal predecessors, (341), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:54,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 344 transitions. [2021-11-02 22:54:54,345 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 344 transitions. Word has length 42 [2021-11-02 22:54:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:54:54,345 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 344 transitions. [2021-11-02 22:54:54,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:54:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 344 transitions. [2021-11-02 22:54:54,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:54:54,347 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:54:54,347 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:54:54,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-02 22:54:54,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:54,564 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:54:54,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:54:54,564 INFO L85 PathProgramCache]: Analyzing trace with hash 194747135, now seen corresponding path program 1 times [2021-11-02 22:54:54,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:54:54,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739605137] [2021-11-02 22:54:54,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:54,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:54:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:55,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:54:55,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:54:55,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:54:55,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739605137] [2021-11-02 22:54:55,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739605137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:54:55,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121364775] [2021-11-02 22:54:55,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:54:55,072 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:54:55,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:54:55,075 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:54:55,076 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 22:54:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:54:55,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 22:54:55,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:54:55,480 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 [2021-11-02 22:54:55,545 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:54:55,545 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 17 treesize of output 21 [2021-11-02 22:54:55,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-02 22:54:55,665 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 28 treesize of output 24 [2021-11-02 22:54:55,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:54:55,854 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:54:55,855 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 54 [2021-11-02 22:54:55,876 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 22:54:55,877 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 78 treesize of output 71 [2021-11-02 22:54:56,220 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-02 22:54:56,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 22:54:56,244 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 20 [2021-11-02 22:54:56,406 INFO L354 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2021-11-02 22:54:56,406 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 98 treesize of output 85 [2021-11-02 22:54:56,438 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-02 22:54:56,438 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 84 treesize of output 86 [2021-11-02 22:54:57,583 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-02 22:54:57,584 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 109 treesize of output 102 [2021-11-02 22:54:57,631 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-02 22:54:57,632 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 93 treesize of output 98 [2021-11-02 22:54:58,874 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-11-02 22:54:58,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 111 [2021-11-02 22:54:58,912 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-11-02 22:54:58,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 99 treesize of output 92 [2021-11-02 22:54:59,265 INFO L354 Elim1Store]: treesize reduction 184, result has 14.4 percent of original size [2021-11-02 22:54:59,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 148 treesize of output 123 [2021-11-02 22:54:59,322 INFO L354 Elim1Store]: treesize reduction 224, result has 13.5 percent of original size [2021-11-02 22:54:59,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 140 treesize of output 144 [2021-11-02 22:55:00,726 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:55:00,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:00,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-11-02 22:55:00,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065458986] [2021-11-02 22:55:00,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:55:00,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:00,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:55:00,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=646, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:55:00,730 INFO L87 Difference]: Start difference. First operand 292 states and 344 transitions. Second operand has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:02,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:02,822 INFO L93 Difference]: Finished difference Result 427 states and 500 transitions. [2021-11-02 22:55:02,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-02 22:55:02,823 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-02 22:55:02,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:02,827 INFO L225 Difference]: With dead ends: 427 [2021-11-02 22:55:02,827 INFO L226 Difference]: Without dead ends: 427 [2021-11-02 22:55:02,828 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=241, Invalid=1241, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 22:55:02,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-11-02 22:55:02,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 292. [2021-11-02 22:55:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 268 states have (on average 1.2686567164179106) internal successors, (340), 288 states have internal predecessors, (340), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 343 transitions. [2021-11-02 22:55:02,838 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 343 transitions. Word has length 42 [2021-11-02 22:55:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:02,839 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 343 transitions. [2021-11-02 22:55:02,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:02,840 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 343 transitions. [2021-11-02 22:55:02,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:55:02,841 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:02,841 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:02,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:03,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:03,056 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr53REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:55:03,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:03,057 INFO L85 PathProgramCache]: Analyzing trace with hash 222176725, now seen corresponding path program 1 times [2021-11-02 22:55:03,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:03,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531018434] [2021-11-02 22:55:03,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:03,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:03,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:03,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:03,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:03,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:03,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:03,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531018434] [2021-11-02 22:55:03,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531018434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:03,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807025343] [2021-11-02 22:55:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:03,219 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:03,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:03,220 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:03,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 22:55:03,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:03,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 22:55:03,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:04,203 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-02 22:55:04,203 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 41 treesize of output 36 [2021-11-02 22:55:04,210 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-11-02 22:55:04,210 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 25 [2021-11-02 22:55:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:04,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807025343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:04,254 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:55:04,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-11-02 22:55:04,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681587343] [2021-11-02 22:55:04,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:55:04,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:04,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:55:04,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=204, Unknown=0, NotChecked=0, Total=240 [2021-11-02 22:55:04,256 INFO L87 Difference]: Start difference. First operand 292 states and 343 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:05,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:05,248 INFO L93 Difference]: Finished difference Result 397 states and 461 transitions. [2021-11-02 22:55:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:55:05,249 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-02 22:55:05,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:05,252 INFO L225 Difference]: With dead ends: 397 [2021-11-02 22:55:05,252 INFO L226 Difference]: Without dead ends: 397 [2021-11-02 22:55:05,252 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-11-02 22:55:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-11-02 22:55:05,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 319. [2021-11-02 22:55:05,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 295 states have (on average 1.2677966101694915) internal successors, (374), 315 states have internal predecessors, (374), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:05,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 377 transitions. [2021-11-02 22:55:05,265 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 377 transitions. Word has length 42 [2021-11-02 22:55:05,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:05,266 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 377 transitions. [2021-11-02 22:55:05,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:05,267 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 377 transitions. [2021-11-02 22:55:05,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:55:05,268 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:05,268 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:05,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:05,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 22:55:05,484 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:55:05,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:05,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1577434814, now seen corresponding path program 1 times [2021-11-02 22:55:05,484 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:05,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007092473] [2021-11-02 22:55:05,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:05,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:06,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:06,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:06,011 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:06,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007092473] [2021-11-02 22:55:06,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007092473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:06,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408708594] [2021-11-02 22:55:06,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:06,025 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:06,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:06,026 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:06,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 22:55:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:06,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 22:55:06,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:06,712 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 [2021-11-02 22:55:06,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:55:06,767 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:55:06,874 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:55:06,874 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 11 treesize of output 11 [2021-11-02 22:55:06,949 INFO L354 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2021-11-02 22:55:06,949 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 25 treesize of output 30 [2021-11-02 22:55:06,979 INFO L354 Elim1Store]: treesize reduction 23, result has 28.1 percent of original size [2021-11-02 22:55:06,980 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 21 treesize of output 20 [2021-11-02 22:55:07,394 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:55:07,394 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 69 treesize of output 67 [2021-11-02 22:55:07,422 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:55:07,423 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 65 treesize of output 67 [2021-11-02 22:55:07,766 INFO L354 Elim1Store]: treesize reduction 136, result has 15.0 percent of original size [2021-11-02 22:55:07,767 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 99 treesize of output 85 [2021-11-02 22:55:07,802 INFO L354 Elim1Store]: treesize reduction 136, result has 15.0 percent of original size [2021-11-02 22:55:07,803 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 80 treesize of output 70 [2021-11-02 22:55:07,947 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:55:07,948 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 11 treesize of output 11 [2021-11-02 22:55:08,100 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-02 22:55:08,100 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 91 treesize of output 96 [2021-11-02 22:55:08,130 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-02 22:55:08,131 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 78 treesize of output 79 [2021-11-02 22:55:08,548 INFO L354 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2021-11-02 22:55:08,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 147 treesize of output 115 [2021-11-02 22:55:08,589 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-11-02 22:55:08,590 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 120 treesize of output 125 [2021-11-02 22:55:15,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:55:15,251 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:15,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:55:15,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174939463] [2021-11-02 22:55:15,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:55:15,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:15,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:55:15,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=754, Unknown=3, NotChecked=0, Total=870 [2021-11-02 22:55:15,254 INFO L87 Difference]: Start difference. First operand 319 states and 377 transitions. Second operand has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:16,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:16,578 INFO L93 Difference]: Finished difference Result 524 states and 620 transitions. [2021-11-02 22:55:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:55:16,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-02 22:55:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:16,581 INFO L225 Difference]: With dead ends: 524 [2021-11-02 22:55:16,582 INFO L226 Difference]: Without dead ends: 524 [2021-11-02 22:55:16,583 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=256, Invalid=1633, Unknown=3, NotChecked=0, Total=1892 [2021-11-02 22:55:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-11-02 22:55:16,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 339. [2021-11-02 22:55:16,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 315 states have (on average 1.2634920634920634) internal successors, (398), 335 states have internal predecessors, (398), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 401 transitions. [2021-11-02 22:55:16,597 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 401 transitions. Word has length 42 [2021-11-02 22:55:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:16,597 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 401 transitions. [2021-11-02 22:55:16,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 401 transitions. [2021-11-02 22:55:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 22:55:16,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:16,599 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:16,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:16,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:16,824 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:55:16,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:16,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1577434815, now seen corresponding path program 1 times [2021-11-02 22:55:16,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:16,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120429587] [2021-11-02 22:55:16,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:16,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:16,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:17,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:17,344 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:17,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120429587] [2021-11-02 22:55:17,344 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120429587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:17,344 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180187184] [2021-11-02 22:55:17,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:17,344 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:17,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:17,345 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:17,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 22:55:17,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:17,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 22:55:17,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:17,911 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 [2021-11-02 22:55:17,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:55:17,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:55:18,051 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:55:18,051 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 11 treesize of output 11 [2021-11-02 22:55:18,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:55:18,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:55:18,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:55:18,133 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 25 treesize of output 24 [2021-11-02 22:55:18,423 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:55:18,424 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 68 treesize of output 66 [2021-11-02 22:55:18,444 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:55:18,444 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 60 treesize of output 62 [2021-11-02 22:55:18,671 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:55:18,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 80 [2021-11-02 22:55:18,688 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:55:18,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2021-11-02 22:55:18,769 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:55:18,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-11-02 22:55:18,904 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-02 22:55:18,904 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 2 case distinctions, treesize of input 82 treesize of output 87 [2021-11-02 22:55:18,921 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-02 22:55:18,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 80 [2021-11-02 22:55:24,874 INFO L354 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2021-11-02 22:55:24,874 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 137 treesize of output 109 [2021-11-02 22:55:24,910 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-11-02 22:55:24,911 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 110 treesize of output 115 [2021-11-02 22:55:33,361 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:55:33,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:33,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:55:33,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671335095] [2021-11-02 22:55:33,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:55:33,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:33,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:55:33,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=623, Unknown=15, NotChecked=0, Total=756 [2021-11-02 22:55:33,363 INFO L87 Difference]: Start difference. First operand 339 states and 401 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:35,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:35,064 INFO L93 Difference]: Finished difference Result 494 states and 581 transitions. [2021-11-02 22:55:35,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:55:35,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-11-02 22:55:35,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:35,067 INFO L225 Difference]: With dead ends: 494 [2021-11-02 22:55:35,067 INFO L226 Difference]: Without dead ends: 494 [2021-11-02 22:55:35,069 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=278, Invalid=1513, Unknown=15, NotChecked=0, Total=1806 [2021-11-02 22:55:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-11-02 22:55:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 333. [2021-11-02 22:55:35,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 309 states have (on average 1.2621359223300972) internal successors, (390), 329 states have internal predecessors, (390), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:35,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 393 transitions. [2021-11-02 22:55:35,080 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 393 transitions. Word has length 42 [2021-11-02 22:55:35,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:35,080 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 393 transitions. [2021-11-02 22:55:35,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:35,081 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 393 transitions. [2021-11-02 22:55:35,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 22:55:35,082 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:35,082 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:35,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:35,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 22:55:35,295 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr65ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:55:35,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:35,296 INFO L85 PathProgramCache]: Analyzing trace with hash -1702456876, now seen corresponding path program 1 times [2021-11-02 22:55:35,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:35,296 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877891445] [2021-11-02 22:55:35,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:35,296 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:35,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:35,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:55:35,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:35,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877891445] [2021-11-02 22:55:35,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877891445] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:35,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666858660] [2021-11-02 22:55:35,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:35,405 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:35,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:35,412 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:35,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 22:55:36,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:36,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 22:55:36,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:55:36,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666858660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:36,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:55:36,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-02 22:55:36,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107111487] [2021-11-02 22:55:36,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 22:55:36,817 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:36,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 22:55:36,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-11-02 22:55:36,818 INFO L87 Difference]: Start difference. First operand 333 states and 393 transitions. Second operand has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:37,147 INFO L93 Difference]: Finished difference Result 345 states and 404 transitions. [2021-11-02 22:55:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 22:55:37,148 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2021-11-02 22:55:37,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:37,154 INFO L225 Difference]: With dead ends: 345 [2021-11-02 22:55:37,154 INFO L226 Difference]: Without dead ends: 315 [2021-11-02 22:55:37,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:55:37,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2021-11-02 22:55:37,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2021-11-02 22:55:37,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 291 states have (on average 1.2714776632302405) internal successors, (370), 311 states have internal predecessors, (370), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 373 transitions. [2021-11-02 22:55:37,163 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 373 transitions. Word has length 43 [2021-11-02 22:55:37,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:37,164 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 373 transitions. [2021-11-02 22:55:37,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:37,164 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 373 transitions. [2021-11-02 22:55:37,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:55:37,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:37,166 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:37,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:37,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:37,392 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:55:37,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:37,392 INFO L85 PathProgramCache]: Analyzing trace with hash 1259618287, now seen corresponding path program 1 times [2021-11-02 22:55:37,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:37,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209696118] [2021-11-02 22:55:37,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:37,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:37,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:37,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:37,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:37,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:37,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:37,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209696118] [2021-11-02 22:55:37,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209696118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:37,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685993605] [2021-11-02 22:55:37,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:37,860 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:37,860 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:37,861 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:37,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 22:55:38,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:38,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 22:55:38,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:38,900 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 [2021-11-02 22:55:38,930 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:55:38,955 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:55:38,955 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 11 treesize of output 11 [2021-11-02 22:55:38,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-02 22:55:38,986 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:55:38,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 22:55:39,019 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 20 treesize of output 8 [2021-11-02 22:55:39,053 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 22:55:39,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-11-02 22:55:39,148 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:55:39,149 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 11 treesize of output 11 [2021-11-02 22:55:39,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-02 22:55:39,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:55:39,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 22:55:39,278 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 11 [2021-11-02 22:55:39,359 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 25 treesize of output 13 [2021-11-02 22:55:39,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:55:39,475 INFO L354 Elim1Store]: treesize reduction 88, result has 17.8 percent of original size [2021-11-02 22:55:39,476 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 42 treesize of output 29 [2021-11-02 22:55:39,563 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.base, main_~x~0.offset] [2021-11-02 22:55:39,564 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:39,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:55:39,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544387590] [2021-11-02 22:55:39,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:55:39,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:39,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:55:39,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2021-11-02 22:55:39,566 INFO L87 Difference]: Start difference. First operand 315 states and 373 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:40,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:55:40,758 INFO L93 Difference]: Finished difference Result 422 states and 492 transitions. [2021-11-02 22:55:40,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:55:40,759 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-02 22:55:40,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:55:40,761 INFO L225 Difference]: With dead ends: 422 [2021-11-02 22:55:40,761 INFO L226 Difference]: Without dead ends: 422 [2021-11-02 22:55:40,762 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=298, Invalid=1424, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 22:55:40,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2021-11-02 22:55:40,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 315. [2021-11-02 22:55:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 291 states have (on average 1.268041237113402) internal successors, (369), 311 states have internal predecessors, (369), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:40,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 372 transitions. [2021-11-02 22:55:40,773 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 372 transitions. Word has length 44 [2021-11-02 22:55:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:55:40,773 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 372 transitions. [2021-11-02 22:55:40,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:55:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 372 transitions. [2021-11-02 22:55:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:55:40,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:55:40,775 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:55:40,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-02 22:55:40,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-02 22:55:40,992 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:55:40,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:55:40,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1417382993, now seen corresponding path program 1 times [2021-11-02 22:55:40,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:55:40,992 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412469846] [2021-11-02 22:55:40,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:40,993 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:55:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:41,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:55:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:41,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:55:41,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:55:41,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412469846] [2021-11-02 22:55:41,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412469846] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:55:41,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479477821] [2021-11-02 22:55:41,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:55:41,595 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:55:41,595 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:55:41,612 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:55:41,614 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 22:55:42,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:55:42,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 22:55:42,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:55:42,505 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 [2021-11-02 22:55:42,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:55:42,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:55:42,669 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:55:42,670 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 11 treesize of output 11 [2021-11-02 22:55:42,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:55:42,757 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 0 case distinctions, treesize of input 25 treesize of output 24 [2021-11-02 22:55:42,767 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:55:42,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:55:43,078 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:55:43,078 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 68 treesize of output 70 [2021-11-02 22:55:43,098 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:55:43,098 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 64 treesize of output 62 [2021-11-02 22:55:43,316 INFO L354 Elim1Store]: treesize reduction 136, result has 15.0 percent of original size [2021-11-02 22:55:43,316 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 98 treesize of output 84 [2021-11-02 22:55:43,352 INFO L354 Elim1Store]: treesize reduction 136, result has 15.0 percent of original size [2021-11-02 22:55:43,352 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 79 treesize of output 69 [2021-11-02 22:55:43,407 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:55:43,407 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 11 treesize of output 11 [2021-11-02 22:55:43,535 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-02 22:55:43,535 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 90 treesize of output 91 [2021-11-02 22:55:43,569 INFO L354 Elim1Store]: treesize reduction 118, result has 16.9 percent of original size [2021-11-02 22:55:43,570 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 83 treesize of output 88 [2021-11-02 22:55:50,252 INFO L354 Elim1Store]: treesize reduction 174, result has 19.8 percent of original size [2021-11-02 22:55:50,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 137 treesize of output 109 [2021-11-02 22:55:50,285 INFO L354 Elim1Store]: treesize reduction 134, result has 17.3 percent of original size [2021-11-02 22:55:50,286 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 110 treesize of output 115 [2021-11-02 22:55:59,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:55:59,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:55:59,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:55:59,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241173556] [2021-11-02 22:55:59,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:55:59,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:55:59,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:55:59,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=571, Unknown=15, NotChecked=0, Total=702 [2021-11-02 22:55:59,268 INFO L87 Difference]: Start difference. First operand 315 states and 372 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:00,921 INFO L93 Difference]: Finished difference Result 469 states and 553 transitions. [2021-11-02 22:56:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 22:56:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-02 22:56:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:00,924 INFO L225 Difference]: With dead ends: 469 [2021-11-02 22:56:00,925 INFO L226 Difference]: Without dead ends: 469 [2021-11-02 22:56:00,926 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=252, Invalid=1373, Unknown=15, NotChecked=0, Total=1640 [2021-11-02 22:56:00,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-11-02 22:56:00,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 308. [2021-11-02 22:56:00,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 284 states have (on average 1.267605633802817) internal successors, (360), 304 states have internal predecessors, (360), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:00,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 363 transitions. [2021-11-02 22:56:00,936 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 363 transitions. Word has length 44 [2021-11-02 22:56:00,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:00,936 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 363 transitions. [2021-11-02 22:56:00,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:00,937 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 363 transitions. [2021-11-02 22:56:00,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:56:00,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:00,938 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:00,987 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:01,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-02 22:56:01,152 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr40REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:56:01,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:01,152 INFO L85 PathProgramCache]: Analyzing trace with hash 49838778, now seen corresponding path program 1 times [2021-11-02 22:56:01,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:01,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554903801] [2021-11-02 22:56:01,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:01,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:01,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:56:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:01,381 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:01,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:01,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554903801] [2021-11-02 22:56:01,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554903801] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:01,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37037321] [2021-11-02 22:56:01,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:01,383 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:01,383 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:01,399 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:01,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 22:56:02,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:02,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 22:56:02,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:02,280 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 [2021-11-02 22:56:02,409 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:56:02,409 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 17 treesize of output 21 [2021-11-02 22:56:02,460 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 21 treesize of output 17 [2021-11-02 22:56:02,637 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:56:02,638 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 36 treesize of output 27 [2021-11-02 22:56:02,777 INFO L354 Elim1Store]: treesize reduction 72, result has 17.2 percent of original size [2021-11-02 22:56:02,777 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 51 treesize of output 30 [2021-11-02 22:56:02,862 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:56:02,863 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 54 treesize of output 39 [2021-11-02 22:56:02,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:56:02,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:56:02,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2021-11-02 22:56:02,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316362296] [2021-11-02 22:56:02,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 22:56:02,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:02,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 22:56:02,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=415, Unknown=0, NotChecked=0, Total=506 [2021-11-02 22:56:02,970 INFO L87 Difference]: Start difference. First operand 308 states and 363 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:03,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:03,879 INFO L93 Difference]: Finished difference Result 474 states and 554 transitions. [2021-11-02 22:56:03,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 22:56:03,880 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-02 22:56:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:03,882 INFO L225 Difference]: With dead ends: 474 [2021-11-02 22:56:03,882 INFO L226 Difference]: Without dead ends: 474 [2021-11-02 22:56:03,883 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:56:03,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-11-02 22:56:03,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 347. [2021-11-02 22:56:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 323 states have (on average 1.2600619195046439) internal successors, (407), 343 states have internal predecessors, (407), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:03,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 410 transitions. [2021-11-02 22:56:03,892 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 410 transitions. Word has length 44 [2021-11-02 22:56:03,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:03,893 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 410 transitions. [2021-11-02 22:56:03,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:03,894 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 410 transitions. [2021-11-02 22:56:03,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 22:56:03,895 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:03,895 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:03,952 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-11-02 22:56:04,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 22:56:04,120 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr41REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:56:04,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:04,120 INFO L85 PathProgramCache]: Analyzing trace with hash 49838779, now seen corresponding path program 1 times [2021-11-02 22:56:04,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:04,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549018688] [2021-11-02 22:56:04,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:04,121 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:04,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:04,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:56:04,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:04,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:04,417 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:04,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549018688] [2021-11-02 22:56:04,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549018688] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:04,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136184659] [2021-11-02 22:56:04,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:04,418 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:04,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:04,420 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:04,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 22:56:05,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:05,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 22:56:05,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:05,323 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 [2021-11-02 22:56:05,467 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 [2021-11-02 22:56:05,479 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:56:05,479 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 11 treesize of output 11 [2021-11-02 22:56:05,521 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 21 treesize of output 17 [2021-11-02 22:56:05,527 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 [2021-11-02 22:56:05,688 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:56:05,688 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 36 treesize of output 27 [2021-11-02 22:56:05,698 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 19 treesize of output 18 [2021-11-02 22:56:05,817 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-02 22:56:05,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:56:05,827 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:56:05,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:56:05,882 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:56:05,883 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 93 treesize of output 66 [2021-11-02 22:56:05,900 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-02 22:56:05,900 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 85 treesize of output 83 [2021-11-02 22:56:06,009 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:56:06,009 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:56:06,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2021-11-02 22:56:06,009 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567126623] [2021-11-02 22:56:06,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 22:56:06,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:06,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 22:56:06,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2021-11-02 22:56:06,011 INFO L87 Difference]: Start difference. First operand 347 states and 410 transitions. Second operand has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:07,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:07,032 INFO L93 Difference]: Finished difference Result 541 states and 630 transitions. [2021-11-02 22:56:07,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:56:07,033 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-11-02 22:56:07,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:07,036 INFO L225 Difference]: With dead ends: 541 [2021-11-02 22:56:07,036 INFO L226 Difference]: Without dead ends: 541 [2021-11-02 22:56:07,036 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:56:07,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2021-11-02 22:56:07,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 397. [2021-11-02 22:56:07,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 373 states have (on average 1.2520107238605898) internal successors, (467), 393 states have internal predecessors, (467), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:07,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 470 transitions. [2021-11-02 22:56:07,048 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 470 transitions. Word has length 44 [2021-11-02 22:56:07,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:07,049 INFO L470 AbstractCegarLoop]: Abstraction has 397 states and 470 transitions. [2021-11-02 22:56:07,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:07,049 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 470 transitions. [2021-11-02 22:56:07,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 22:56:07,050 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:07,051 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:07,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:07,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 22:56:07,272 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr59ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:56:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:07,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1439823273, now seen corresponding path program 1 times [2021-11-02 22:56:07,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:07,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749124753] [2021-11-02 22:56:07,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:07,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:07,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:07,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:56:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:07,452 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:07,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:07,452 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749124753] [2021-11-02 22:56:07,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749124753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:56:07,453 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 22:56:07,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-02 22:56:07,453 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794329636] [2021-11-02 22:56:07,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:56:07,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:07,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:56:07,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-11-02 22:56:07,455 INFO L87 Difference]: Start difference. First operand 397 states and 470 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:07,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:07,985 INFO L93 Difference]: Finished difference Result 422 states and 494 transitions. [2021-11-02 22:56:07,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 22:56:07,985 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-11-02 22:56:07,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:07,987 INFO L225 Difference]: With dead ends: 422 [2021-11-02 22:56:07,987 INFO L226 Difference]: Without dead ends: 417 [2021-11-02 22:56:07,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:56:07,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-02 22:56:07,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 393. [2021-11-02 22:56:07,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 369 states have (on average 1.2520325203252032) internal successors, (462), 389 states have internal predecessors, (462), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:07,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 465 transitions. [2021-11-02 22:56:07,998 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 465 transitions. Word has length 45 [2021-11-02 22:56:07,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:07,998 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 465 transitions. [2021-11-02 22:56:07,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:07,999 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 465 transitions. [2021-11-02 22:56:08,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:56:08,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:08,001 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:08,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-11-02 22:56:08,001 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr59ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:56:08,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:08,002 INFO L85 PathProgramCache]: Analyzing trace with hash 825444189, now seen corresponding path program 1 times [2021-11-02 22:56:08,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:08,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729559209] [2021-11-02 22:56:08,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:08,003 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:08,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:56:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:08,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:08,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:08,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729559209] [2021-11-02 22:56:08,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729559209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:08,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42605851] [2021-11-02 22:56:08,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:08,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:08,228 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:08,232 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:08,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 22:56:09,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:09,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 22:56:09,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:09,216 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 [2021-11-02 22:56:09,264 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:56:09,265 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 11 treesize of output 11 [2021-11-02 22:56:09,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:56:09,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-02 22:56:09,343 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 20 treesize of output 8 [2021-11-02 22:56:09,380 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:56:09,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 47 treesize of output 46 [2021-11-02 22:56:10,327 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:56:10,327 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 [2021-11-02 22:56:10,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:10,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42605851] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:10,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:10,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 17 [2021-11-02 22:56:10,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157257630] [2021-11-02 22:56:10,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:56:10,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:10,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:56:10,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:56:10,333 INFO L87 Difference]: Start difference. First operand 393 states and 465 transitions. Second operand has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:11,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:11,303 INFO L93 Difference]: Finished difference Result 417 states and 489 transitions. [2021-11-02 22:56:11,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 22:56:11,304 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-02 22:56:11,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:11,306 INFO L225 Difference]: With dead ends: 417 [2021-11-02 22:56:11,306 INFO L226 Difference]: Without dead ends: 417 [2021-11-02 22:56:11,307 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=213, Invalid=779, Unknown=0, NotChecked=0, Total=992 [2021-11-02 22:56:11,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-11-02 22:56:11,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 401. [2021-11-02 22:56:11,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 401 states, 377 states have (on average 1.2493368700265253) internal successors, (471), 397 states have internal predecessors, (471), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:11,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 401 states to 401 states and 474 transitions. [2021-11-02 22:56:11,316 INFO L78 Accepts]: Start accepts. Automaton has 401 states and 474 transitions. Word has length 46 [2021-11-02 22:56:11,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:11,317 INFO L470 AbstractCegarLoop]: Abstraction has 401 states and 474 transitions. [2021-11-02 22:56:11,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 states have internal predecessors, (77), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:11,317 INFO L276 IsEmpty]: Start isEmpty. Operand 401 states and 474 transitions. [2021-11-02 22:56:11,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:56:11,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:11,319 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:11,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:11,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:11,532 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:56:11,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:11,532 INFO L85 PathProgramCache]: Analyzing trace with hash -969304770, now seen corresponding path program 1 times [2021-11-02 22:56:11,532 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:11,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927203571] [2021-11-02 22:56:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:11,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:11,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:12,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:56:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:12,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:12,205 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927203571] [2021-11-02 22:56:12,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927203571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:12,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905079785] [2021-11-02 22:56:12,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:12,206 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:12,206 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:12,212 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:12,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 22:56:13,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:13,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 22:56:13,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:13,272 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 [2021-11-02 22:56:13,322 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:56:13,323 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 17 treesize of output 21 [2021-11-02 22:56:13,383 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 23 treesize of output 19 [2021-11-02 22:56:13,476 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:56:13,476 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-02 22:56:13,681 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 22:56:13,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 22:56:13,827 INFO L354 Elim1Store]: treesize reduction 54, result has 29.9 percent of original size [2021-11-02 22:56:13,827 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 65 treesize of output 58 [2021-11-02 22:56:14,547 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-02 22:56:14,548 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 75 treesize of output 68 [2021-11-02 22:56:15,257 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-11-02 22:56:15,257 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 69 treesize of output 62 [2021-11-02 22:56:15,457 INFO L354 Elim1Store]: treesize reduction 70, result has 28.6 percent of original size [2021-11-02 22:56:15,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 64 treesize of output 82 [2021-11-02 22:56:15,789 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-11-02 22:56:15,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 88 [2021-11-02 22:56:16,833 INFO L354 Elim1Store]: treesize reduction 260, result has 13.3 percent of original size [2021-11-02 22:56:16,833 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 160 treesize of output 107 [2021-11-02 22:56:18,905 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:56:18,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:56:18,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:56:18,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163379653] [2021-11-02 22:56:18,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 22:56:18,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:18,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 22:56:18,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=879, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 22:56:18,907 INFO L87 Difference]: Start difference. First operand 401 states and 474 transitions. Second operand has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:21,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:21,157 INFO L93 Difference]: Finished difference Result 720 states and 850 transitions. [2021-11-02 22:56:21,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-02 22:56:21,157 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-02 22:56:21,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:21,161 INFO L225 Difference]: With dead ends: 720 [2021-11-02 22:56:21,161 INFO L226 Difference]: Without dead ends: 720 [2021-11-02 22:56:21,162 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=511, Invalid=3149, Unknown=0, NotChecked=0, Total=3660 [2021-11-02 22:56:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-11-02 22:56:21,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 421. [2021-11-02 22:56:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 397 states have (on average 1.2468513853904282) internal successors, (495), 417 states have internal predecessors, (495), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:21,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 498 transitions. [2021-11-02 22:56:21,184 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 498 transitions. Word has length 46 [2021-11-02 22:56:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:21,184 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 498 transitions. [2021-11-02 22:56:21,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.263157894736842) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:21,184 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 498 transitions. [2021-11-02 22:56:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 22:56:21,185 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:21,186 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:21,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:21,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-02 22:56:21,400 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:56:21,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:21,400 INFO L85 PathProgramCache]: Analyzing trace with hash -969304769, now seen corresponding path program 1 times [2021-11-02 22:56:21,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:21,401 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94347496] [2021-11-02 22:56:21,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:21,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:22,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:56:22,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:22,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:22,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:22,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94347496] [2021-11-02 22:56:22,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94347496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:22,083 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173352528] [2021-11-02 22:56:22,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:22,084 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:22,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:22,091 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:22,111 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 22:56:23,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:23,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 22:56:23,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:23,255 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 [2021-11-02 22:56:23,299 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 [2021-11-02 22:56:23,352 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:56:23,353 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 17 treesize of output 21 [2021-11-02 22:56:23,416 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 28 treesize of output 24 [2021-11-02 22:56:23,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:56:23,608 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:56:23,609 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 88 treesize of output 54 [2021-11-02 22:56:23,621 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 22:56:23,622 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 78 treesize of output 71 [2021-11-02 22:56:23,953 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-02 22:56:23,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 18 treesize of output 20 [2021-11-02 22:56:23,986 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-02 22:56:23,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 22:56:24,106 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:56:24,118 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-02 22:56:24,118 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 2 case distinctions, treesize of input 98 treesize of output 79 [2021-11-02 22:56:24,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:56:24,137 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-02 22:56:24,137 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 2 case distinctions, treesize of input 99 treesize of output 101 [2021-11-02 22:56:24,696 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-02 22:56:24,696 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 127 treesize of output 99 [2021-11-02 22:56:24,736 INFO L354 Elim1Store]: treesize reduction 144, result has 17.2 percent of original size [2021-11-02 22:56:24,736 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 123 treesize of output 128 [2021-11-02 22:56:25,098 INFO L354 Elim1Store]: treesize reduction 208, result has 13.0 percent of original size [2021-11-02 22:56:25,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 157 treesize of output 117 [2021-11-02 22:56:25,155 INFO L354 Elim1Store]: treesize reduction 244, result has 13.2 percent of original size [2021-11-02 22:56:25,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 126 treesize of output 119 [2021-11-02 22:56:25,328 INFO L354 Elim1Store]: treesize reduction 76, result has 21.6 percent of original size [2021-11-02 22:56:25,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 66 treesize of output 71 [2021-11-02 22:56:25,367 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:56:25,367 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 11 treesize of output 11 [2021-11-02 22:56:25,578 INFO L354 Elim1Store]: treesize reduction 184, result has 14.4 percent of original size [2021-11-02 22:56:25,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 154 treesize of output 129 [2021-11-02 22:56:25,653 INFO L354 Elim1Store]: treesize reduction 220, result has 14.4 percent of original size [2021-11-02 22:56:25,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 153 treesize of output 161 [2021-11-02 22:56:35,700 INFO L354 Elim1Store]: treesize reduction 250, result has 16.7 percent of original size [2021-11-02 22:56:35,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 211 treesize of output 147 [2021-11-02 22:56:35,793 INFO L354 Elim1Store]: treesize reduction 236, result has 14.8 percent of original size [2021-11-02 22:56:35,793 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 174 treesize of output 182 [2021-11-02 22:56:51,292 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:56:51,293 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:56:51,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 22:56:51,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520912045] [2021-11-02 22:56:51,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:56:51,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:51,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:56:51,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1019, Unknown=13, NotChecked=0, Total=1190 [2021-11-02 22:56:51,294 INFO L87 Difference]: Start difference. First operand 421 states and 498 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:53,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:53,745 INFO L93 Difference]: Finished difference Result 663 states and 779 transitions. [2021-11-02 22:56:53,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 22:56:53,745 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-02 22:56:53,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:53,749 INFO L225 Difference]: With dead ends: 663 [2021-11-02 22:56:53,749 INFO L226 Difference]: Without dead ends: 663 [2021-11-02 22:56:53,750 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 26.1s TimeCoverageRelationStatistics Valid=461, Invalid=2831, Unknown=14, NotChecked=0, Total=3306 [2021-11-02 22:56:53,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2021-11-02 22:56:53,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 421. [2021-11-02 22:56:53,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 397 states have (on average 1.2443324937027709) internal successors, (494), 417 states have internal predecessors, (494), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:53,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 497 transitions. [2021-11-02 22:56:53,761 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 497 transitions. Word has length 46 [2021-11-02 22:56:53,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:53,762 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 497 transitions. [2021-11-02 22:56:53,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:53,762 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 497 transitions. [2021-11-02 22:56:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 22:56:53,764 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:53,764 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:53,802 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 22:56:53,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:53,980 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr60ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:56:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:53,980 INFO L85 PathProgramCache]: Analyzing trace with hash -181033671, now seen corresponding path program 1 times [2021-11-02 22:56:53,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:53,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048490408] [2021-11-02 22:56:53,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:53,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:54,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:56:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:54,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:54,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048490408] [2021-11-02 22:56:54,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048490408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:54,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969814526] [2021-11-02 22:56:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:54,248 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:54,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:54,250 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:54,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 22:56:55,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:55,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 22:56:55,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:55,675 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 [2021-11-02 22:56:55,717 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:56:55,718 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 11 treesize of output 11 [2021-11-02 22:56:55,737 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 23 treesize of output 19 [2021-11-02 22:56:55,806 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:56:55,806 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-02 22:56:56,581 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:56:56,581 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 3 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 19 [2021-11-02 22:56:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:56,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1969814526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:56,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:56,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-11-02 22:56:56,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044321468] [2021-11-02 22:56:56,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:56:56,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:56,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:56:56,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-11-02 22:56:56,594 INFO L87 Difference]: Start difference. First operand 421 states and 497 transitions. Second operand has 19 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:57,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:56:57,551 INFO L93 Difference]: Finished difference Result 435 states and 510 transitions. [2021-11-02 22:56:57,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-02 22:56:57,552 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2021-11-02 22:56:57,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:56:57,554 INFO L225 Difference]: With dead ends: 435 [2021-11-02 22:56:57,554 INFO L226 Difference]: Without dead ends: 435 [2021-11-02 22:56:57,555 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=637, Unknown=0, NotChecked=0, Total=812 [2021-11-02 22:56:57,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-02 22:56:57,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 422. [2021-11-02 22:56:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 398 states have (on average 1.243718592964824) internal successors, (495), 418 states have internal predecessors, (495), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:57,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 498 transitions. [2021-11-02 22:56:57,562 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 498 transitions. Word has length 47 [2021-11-02 22:56:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:56:57,562 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 498 transitions. [2021-11-02 22:56:57,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.388888888888889) internal successors, (79), 18 states have internal predecessors, (79), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:56:57,563 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 498 transitions. [2021-11-02 22:56:57,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:56:57,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:56:57,564 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:56:57,611 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-11-02 22:56:57,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:57,779 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr61ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:56:57,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:56:57,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1317076257, now seen corresponding path program 1 times [2021-11-02 22:56:57,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:56:57,780 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843717900] [2021-11-02 22:56:57,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:57,780 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:56:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:57,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:56:57,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:58,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:58,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:56:58,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843717900] [2021-11-02 22:56:58,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843717900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:58,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144457126] [2021-11-02 22:56:58,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:56:58,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:56:58,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:56:58,006 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:56:58,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 22:56:59,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:56:59,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 22:56:59,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:56:59,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-11-02 22:56:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:56:59,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144457126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:56:59,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:56:59,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 17 [2021-11-02 22:56:59,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866375447] [2021-11-02 22:56:59,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 22:56:59,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:56:59,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 22:56:59,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-11-02 22:56:59,839 INFO L87 Difference]: Start difference. First operand 422 states and 498 transitions. Second operand has 18 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:00,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:00,895 INFO L93 Difference]: Finished difference Result 540 states and 628 transitions. [2021-11-02 22:57:00,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 22:57:00,896 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-02 22:57:00,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:00,899 INFO L225 Difference]: With dead ends: 540 [2021-11-02 22:57:00,899 INFO L226 Difference]: Without dead ends: 540 [2021-11-02 22:57:00,899 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=230, Invalid=960, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 22:57:00,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 540 states. [2021-11-02 22:57:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 540 to 506. [2021-11-02 22:57:00,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 482 states have (on average 1.2593360995850622) internal successors, (607), 502 states have internal predecessors, (607), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 610 transitions. [2021-11-02 22:57:00,911 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 610 transitions. Word has length 48 [2021-11-02 22:57:00,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:00,912 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 610 transitions. [2021-11-02 22:57:00,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:00,913 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 610 transitions. [2021-11-02 22:57:00,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:57:00,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:00,914 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:00,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 22:57:01,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-02 22:57:01,128 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:57:01,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:01,128 INFO L85 PathProgramCache]: Analyzing trace with hash -702764497, now seen corresponding path program 1 times [2021-11-02 22:57:01,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:01,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283740653] [2021-11-02 22:57:01,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:01,129 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:01,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:57:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:01,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:01,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:01,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283740653] [2021-11-02 22:57:01,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283740653] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:01,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454519631] [2021-11-02 22:57:01,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:01,691 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:01,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:01,692 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:01,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 22:57:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:03,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 22:57:03,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:03,096 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 [2021-11-02 22:57:03,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:57:03,157 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:57:03,157 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 17 treesize of output 21 [2021-11-02 22:57:03,214 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 23 treesize of output 19 [2021-11-02 22:57:03,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:03,222 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 22:57:03,293 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 31 treesize of output 13 [2021-11-02 22:57:03,357 INFO L354 Elim1Store]: treesize reduction 35, result has 20.5 percent of original size [2021-11-02 22:57:03,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 22 [2021-11-02 22:57:03,602 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-02 22:57:03,603 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 20 treesize of output 22 [2021-11-02 22:57:03,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-02 22:57:03,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:03,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-11-02 22:57:03,756 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 11 [2021-11-02 22:57:03,874 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 25 treesize of output 13 [2021-11-02 22:57:03,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 22 [2021-11-02 22:57:03,993 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:57:03,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-11-02 22:57:04,059 INFO L354 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2021-11-02 22:57:04,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 25 [2021-11-02 22:57:04,068 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 18 treesize of output 14 [2021-11-02 22:57:04,175 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 21 [2021-11-02 22:57:04,306 INFO L354 Elim1Store]: treesize reduction 74, result has 28.2 percent of original size [2021-11-02 22:57:04,307 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 42 treesize of output 43 [2021-11-02 22:57:04,453 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 [2021-11-02 22:57:04,483 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:04,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454519631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:04,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:57:04,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 36 [2021-11-02 22:57:04,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450120709] [2021-11-02 22:57:04,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 22:57:04,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:04,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 22:57:04,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=1083, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 22:57:04,486 INFO L87 Difference]: Start difference. First operand 506 states and 610 transitions. Second operand has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:06,625 INFO L93 Difference]: Finished difference Result 699 states and 843 transitions. [2021-11-02 22:57:06,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:57:06,632 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-02 22:57:06,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:06,635 INFO L225 Difference]: With dead ends: 699 [2021-11-02 22:57:06,635 INFO L226 Difference]: Without dead ends: 699 [2021-11-02 22:57:06,637 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=506, Invalid=2574, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 22:57:06,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-02 22:57:06,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 506. [2021-11-02 22:57:06,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 482 states have (on average 1.2572614107883817) internal successors, (606), 502 states have internal predecessors, (606), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:06,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 609 transitions. [2021-11-02 22:57:06,650 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 609 transitions. Word has length 48 [2021-11-02 22:57:06,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:06,651 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 609 transitions. [2021-11-02 22:57:06,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:06,652 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 609 transitions. [2021-11-02 22:57:06,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:57:06,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:06,653 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:06,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 22:57:06,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:06,880 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr40REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:57:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:06,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1354693382, now seen corresponding path program 1 times [2021-11-02 22:57:06,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:06,881 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576805664] [2021-11-02 22:57:06,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:06,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:06,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:07,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:57:07,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:07,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:07,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576805664] [2021-11-02 22:57:07,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576805664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:07,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266742288] [2021-11-02 22:57:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:07,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:07,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:07,302 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:07,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 22:57:09,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:09,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 22:57:09,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:09,073 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 [2021-11-02 22:57:09,194 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:57:09,194 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 11 treesize of output 11 [2021-11-02 22:57:09,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-11-02 22:57:09,389 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:57:09,389 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 27 treesize of output 22 [2021-11-02 22:57:09,500 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-02 22:57:09,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:57:09,536 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:57:09,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-11-02 22:57:09,611 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-02 22:57:09,612 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 32 treesize of output 34 [2021-11-02 22:57:09,817 INFO L354 Elim1Store]: treesize reduction 104, result has 24.6 percent of original size [2021-11-02 22:57:09,818 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 74 treesize of output 63 [2021-11-02 22:57:14,128 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:57:14,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:57:14,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2021-11-02 22:57:14,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602796250] [2021-11-02 22:57:14,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 22:57:14,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:14,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 22:57:14,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=611, Unknown=2, NotChecked=0, Total=702 [2021-11-02 22:57:14,130 INFO L87 Difference]: Start difference. First operand 506 states and 609 transitions. Second operand has 16 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:15,403 INFO L93 Difference]: Finished difference Result 708 states and 852 transitions. [2021-11-02 22:57:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 22:57:15,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-02 22:57:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:15,408 INFO L225 Difference]: With dead ends: 708 [2021-11-02 22:57:15,408 INFO L226 Difference]: Without dead ends: 708 [2021-11-02 22:57:15,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=271, Invalid=1707, Unknown=2, NotChecked=0, Total=1980 [2021-11-02 22:57:15,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 708 states. [2021-11-02 22:57:15,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 708 to 533. [2021-11-02 22:57:15,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 509 states have (on average 1.2593320235756384) internal successors, (641), 529 states have internal predecessors, (641), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 644 transitions. [2021-11-02 22:57:15,419 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 644 transitions. Word has length 48 [2021-11-02 22:57:15,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:15,419 INFO L470 AbstractCegarLoop]: Abstraction has 533 states and 644 transitions. [2021-11-02 22:57:15,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 644 transitions. [2021-11-02 22:57:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 22:57:15,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:15,421 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:15,474 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-02 22:57:15,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 22:57:15,644 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr41REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:57:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:15,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1354693381, now seen corresponding path program 1 times [2021-11-02 22:57:15,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:15,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922563976] [2021-11-02 22:57:15,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:15,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:15,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:16,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:57:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:16,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:16,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:16,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922563976] [2021-11-02 22:57:16,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922563976] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:16,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172869053] [2021-11-02 22:57:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:16,158 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:16,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:16,160 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:16,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 22:57:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:17,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 22:57:17,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:18,015 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 [2021-11-02 22:57:18,162 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:57:18,163 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 17 treesize of output 21 [2021-11-02 22:57:18,230 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 [2021-11-02 22:57:18,235 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 21 treesize of output 17 [2021-11-02 22:57:18,504 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:57:18,505 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 19 treesize of output 18 [2021-11-02 22:57:18,537 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:57:18,537 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 36 treesize of output 27 [2021-11-02 22:57:18,734 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:18,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:57:18,746 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:18,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:57:18,845 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-02 22:57:18,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 22:57:18,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-11-02 22:57:18,963 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:18,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 43 [2021-11-02 22:57:18,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:18,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 30 [2021-11-02 22:57:19,278 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-02 22:57:19,278 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 161 treesize of output 92 [2021-11-02 22:57:19,310 INFO L354 Elim1Store]: treesize reduction 116, result has 14.1 percent of original size [2021-11-02 22:57:19,311 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 147 treesize of output 139 [2021-11-02 22:57:21,025 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:57:21,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:57:21,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2021-11-02 22:57:21,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871485822] [2021-11-02 22:57:21,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 22:57:21,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:21,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 22:57:21,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=719, Unknown=1, NotChecked=0, Total=812 [2021-11-02 22:57:21,026 INFO L87 Difference]: Start difference. First operand 533 states and 644 transitions. Second operand has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:22,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:22,640 INFO L93 Difference]: Finished difference Result 805 states and 961 transitions. [2021-11-02 22:57:22,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-02 22:57:22,640 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-11-02 22:57:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:22,645 INFO L225 Difference]: With dead ends: 805 [2021-11-02 22:57:22,645 INFO L226 Difference]: Without dead ends: 805 [2021-11-02 22:57:22,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=231, Invalid=1748, Unknown=1, NotChecked=0, Total=1980 [2021-11-02 22:57:22,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 805 states. [2021-11-02 22:57:22,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 805 to 475. [2021-11-02 22:57:22,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 451 states have (on average 1.2660753880266076) internal successors, (571), 471 states have internal predecessors, (571), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:22,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 574 transitions. [2021-11-02 22:57:22,659 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 574 transitions. Word has length 48 [2021-11-02 22:57:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:22,659 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 574 transitions. [2021-11-02 22:57:22,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:22,660 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 574 transitions. [2021-11-02 22:57:22,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 22:57:22,661 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:22,661 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:22,712 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-02 22:57:22,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 22:57:22,876 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:57:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:22,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1857667515, now seen corresponding path program 1 times [2021-11-02 22:57:22,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:22,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839604563] [2021-11-02 22:57:22,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:22,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:22,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:23,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:57:23,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:23,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:23,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839604563] [2021-11-02 22:57:23,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839604563] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:23,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45635720] [2021-11-02 22:57:23,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:23,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:23,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:23,948 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:23,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 22:57:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:25,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 22:57:25,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:25,868 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 [2021-11-02 22:57:25,920 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:57:25,920 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 17 treesize of output 21 [2021-11-02 22:57:25,981 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 23 treesize of output 19 [2021-11-02 22:57:25,988 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 13 treesize of output 9 [2021-11-02 22:57:26,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:26,072 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 57 [2021-11-02 22:57:26,075 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:26,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:26,078 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 67 treesize of output 60 [2021-11-02 22:57:26,320 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-02 22:57:26,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 22:57:26,454 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:26,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:26,471 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:57:26,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 75 [2021-11-02 22:57:26,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:26,493 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-02 22:57:26,493 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 2 case distinctions, treesize of input 85 treesize of output 84 [2021-11-02 22:57:26,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:26,888 INFO L354 Elim1Store]: treesize reduction 100, result has 19.4 percent of original size [2021-11-02 22:57:26,889 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 88 [2021-11-02 22:57:26,915 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-02 22:57:26,915 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 102 treesize of output 101 [2021-11-02 22:57:27,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:27,259 INFO L354 Elim1Store]: treesize reduction 194, result has 13.8 percent of original size [2021-11-02 22:57:27,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 130 treesize of output 100 [2021-11-02 22:57:27,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:27,300 INFO L354 Elim1Store]: treesize reduction 150, result has 16.7 percent of original size [2021-11-02 22:57:27,300 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 103 treesize of output 93 [2021-11-02 22:57:27,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:27,509 INFO L354 Elim1Store]: treesize reduction 170, result has 15.4 percent of original size [2021-11-02 22:57:27,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 139 treesize of output 103 [2021-11-02 22:57:27,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:27,552 INFO L354 Elim1Store]: treesize reduction 160, result has 17.5 percent of original size [2021-11-02 22:57:27,553 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 131 treesize of output 132 [2021-11-02 22:57:27,938 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:57:27,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:57:27,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 22:57:27,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468089645] [2021-11-02 22:57:27,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 22:57:27,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:27,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 22:57:27,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=824, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:57:27,941 INFO L87 Difference]: Start difference. First operand 475 states and 574 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:30,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:30,729 INFO L93 Difference]: Finished difference Result 699 states and 845 transitions. [2021-11-02 22:57:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:57:30,730 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-11-02 22:57:30,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:30,733 INFO L225 Difference]: With dead ends: 699 [2021-11-02 22:57:30,733 INFO L226 Difference]: Without dead ends: 699 [2021-11-02 22:57:30,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 6 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=339, Invalid=2106, Unknown=5, NotChecked=0, Total=2450 [2021-11-02 22:57:30,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2021-11-02 22:57:30,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 491. [2021-11-02 22:57:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 467 states have (on average 1.2612419700214133) internal successors, (589), 487 states have internal predecessors, (589), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:30,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 592 transitions. [2021-11-02 22:57:30,744 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 592 transitions. Word has length 49 [2021-11-02 22:57:30,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:30,744 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 592 transitions. [2021-11-02 22:57:30,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:30,745 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 592 transitions. [2021-11-02 22:57:30,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:57:30,746 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:30,746 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:30,778 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-02 22:57:30,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 22:57:30,952 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr65ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:57:30,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:30,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1434638485, now seen corresponding path program 1 times [2021-11-02 22:57:30,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:30,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891933849] [2021-11-02 22:57:30,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:30,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:31,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:57:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:31,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:31,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:31,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891933849] [2021-11-02 22:57:31,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891933849] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:31,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935587280] [2021-11-02 22:57:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:31,205 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:31,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:31,212 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:31,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 22:57:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:32,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 22:57:32,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:32,882 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 [2021-11-02 22:57:32,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:57:32,957 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:57:32,957 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 11 treesize of output 11 [2021-11-02 22:57:32,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-02 22:57:32,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:32,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-11-02 22:57:33,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-11-02 22:57:33,064 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-02 22:57:33,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-11-02 22:57:33,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:57:33,184 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 17 treesize of output 17 [2021-11-02 22:57:33,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 22:57:33,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935587280] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 22:57:33,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:57:33,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [11] total 20 [2021-11-02 22:57:33,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689572419] [2021-11-02 22:57:33,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-02 22:57:33,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:57:33,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-02 22:57:33,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-11-02 22:57:33,229 INFO L87 Difference]: Start difference. First operand 491 states and 592 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:33,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:57:33,647 INFO L93 Difference]: Finished difference Result 501 states and 600 transitions. [2021-11-02 22:57:33,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 22:57:33,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-02 22:57:33,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:57:33,650 INFO L225 Difference]: With dead ends: 501 [2021-11-02 22:57:33,650 INFO L226 Difference]: Without dead ends: 500 [2021-11-02 22:57:33,650 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:57:33,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-11-02 22:57:33,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 491. [2021-11-02 22:57:33,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 467 states have (on average 1.259100642398287) internal successors, (588), 487 states have internal predecessors, (588), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 591 transitions. [2021-11-02 22:57:33,658 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 591 transitions. Word has length 50 [2021-11-02 22:57:33,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:57:33,658 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 591 transitions. [2021-11-02 22:57:33,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 11 states have internal predecessors, (47), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:57:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 591 transitions. [2021-11-02 22:57:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:57:33,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:57:33,660 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:57:33,698 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-11-02 22:57:33,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:33,872 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:57:33,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:57:33,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1971483754, now seen corresponding path program 2 times [2021-11-02 22:57:33,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:57:33,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962599889] [2021-11-02 22:57:33,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:57:33,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:57:33,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:34,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:57:34,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:57:34,545 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:57:34,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:57:34,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962599889] [2021-11-02 22:57:34,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962599889] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:57:34,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047309298] [2021-11-02 22:57:34,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:57:34,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:57:34,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:57:34,547 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:57:34,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 22:57:36,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:57:36,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:57:36,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 22:57:36,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:57:36,247 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 [2021-11-02 22:57:36,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:57:36,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:57:36,433 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:57:36,434 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 11 treesize of output 11 [2021-11-02 22:57:36,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:36,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:57:36,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:57:36,529 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 25 treesize of output 24 [2021-11-02 22:57:36,877 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:57:36,878 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 66 treesize of output 64 [2021-11-02 22:57:36,901 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:57:36,901 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 58 treesize of output 60 [2021-11-02 22:57:37,171 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:57:37,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 88 treesize of output 78 [2021-11-02 22:57:37,184 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:57:37,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 69 treesize of output 59 [2021-11-02 22:57:37,280 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-02 22:57:37,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 76 treesize of output 81 [2021-11-02 22:57:37,292 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-02 22:57:37,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 77 [2021-11-02 22:57:37,478 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:57:37,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-11-02 22:57:37,600 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 22:57:37,601 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 95 [2021-11-02 22:57:37,615 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 22:57:37,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 76 treesize of output 77 [2021-11-02 22:57:39,404 INFO L354 Elim1Store]: treesize reduction 166, result has 23.5 percent of original size [2021-11-02 22:57:39,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 112 treesize of output 117 [2021-11-02 22:57:39,447 INFO L354 Elim1Store]: treesize reduction 130, result has 25.3 percent of original size [2021-11-02 22:57:39,447 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 126 treesize of output 145 [2021-11-02 22:57:41,879 INFO L354 Elim1Store]: treesize reduction 182, result has 19.5 percent of original size [2021-11-02 22:57:41,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 170 treesize of output 161 [2021-11-02 22:57:41,923 INFO L354 Elim1Store]: treesize reduction 130, result has 21.2 percent of original size [2021-11-02 22:57:41,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 185 treesize of output 192 [2021-11-02 22:57:45,325 INFO L354 Elim1Store]: treesize reduction 272, result has 12.8 percent of original size [2021-11-02 22:57:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 201 treesize of output 175 [2021-11-02 22:57:45,389 INFO L354 Elim1Store]: treesize reduction 220, result has 14.4 percent of original size [2021-11-02 22:57:45,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 197 treesize of output 205 [2021-11-02 22:58:07,043 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:58:07,043 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:58:07,043 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 22:58:07,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115730471] [2021-11-02 22:58:07,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 22:58:07,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:07,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 22:58:07,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1050, Unknown=8, NotChecked=0, Total=1260 [2021-11-02 22:58:07,046 INFO L87 Difference]: Start difference. First operand 491 states and 591 transitions. Second operand has 21 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:58:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:09,630 INFO L93 Difference]: Finished difference Result 863 states and 1047 transitions. [2021-11-02 22:58:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-02 22:58:09,630 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-02 22:58:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:09,636 INFO L225 Difference]: With dead ends: 863 [2021-11-02 22:58:09,636 INFO L226 Difference]: Without dead ends: 863 [2021-11-02 22:58:09,636 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 27 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 844 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=503, Invalid=2569, Unknown=8, NotChecked=0, Total=3080 [2021-11-02 22:58:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-11-02 22:58:09,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 518. [2021-11-02 22:58:09,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 494 states have (on average 1.2591093117408907) internal successors, (622), 514 states have internal predecessors, (622), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:58:09,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 625 transitions. [2021-11-02 22:58:09,647 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 625 transitions. Word has length 50 [2021-11-02 22:58:09,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:09,647 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 625 transitions. [2021-11-02 22:58:09,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.35) internal successors, (47), 20 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:58:09,647 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 625 transitions. [2021-11-02 22:58:09,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:58:09,648 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:09,648 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:09,685 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 22:58:09,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-02 22:58:09,849 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:58:09,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:09,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1971483755, now seen corresponding path program 2 times [2021-11-02 22:58:09,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:09,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626149850] [2021-11-02 22:58:09,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:09,850 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:10,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:10,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:58:10,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:10,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626149850] [2021-11-02 22:58:10,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626149850] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:58:10,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738464873] [2021-11-02 22:58:10,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 22:58:10,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:58:10,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:58:10,687 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:58:10,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 22:58:12,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 22:58:12,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 22:58:12,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 22:58:12,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:58:12,519 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 [2021-11-02 22:58:12,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:58:12,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:58:12,841 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:58:12,841 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 11 treesize of output 11 [2021-11-02 22:58:12,950 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:58:12,951 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 25 treesize of output 24 [2021-11-02 22:58:12,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:58:12,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:58:13,387 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:58:13,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:58:13,442 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:58:13,442 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 39 treesize of output 37 [2021-11-02 22:58:13,744 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 22:58:13,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 46 treesize of output 36 [2021-11-02 22:58:13,765 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:58:13,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 23 [2021-11-02 22:58:13,817 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-11-02 22:58:13,817 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 30 treesize of output 32 [2021-11-02 22:58:13,834 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:58:13,838 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-02 22:58:13,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 45 [2021-11-02 22:58:14,080 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:58:14,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-11-02 22:58:14,247 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 22:58:14,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 51 treesize of output 52 [2021-11-02 22:58:14,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:58:14,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-02 22:58:14,869 INFO L354 Elim1Store]: treesize reduction 166, result has 23.5 percent of original size [2021-11-02 22:58:14,870 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 105 treesize of output 110 [2021-11-02 22:58:14,916 INFO L354 Elim1Store]: treesize reduction 78, result has 32.2 percent of original size [2021-11-02 22:58:14,916 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 135 [2021-11-02 22:58:19,963 INFO L354 Elim1Store]: treesize reduction 182, result has 19.5 percent of original size [2021-11-02 22:58:19,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 163 treesize of output 154 [2021-11-02 22:58:20,006 INFO L354 Elim1Store]: treesize reduction 102, result has 25.5 percent of original size [2021-11-02 22:58:20,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 178 treesize of output 182 [2021-11-02 22:58:23,498 INFO L354 Elim1Store]: treesize reduction 272, result has 12.8 percent of original size [2021-11-02 22:58:23,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 194 treesize of output 168 [2021-11-02 22:58:23,549 INFO L354 Elim1Store]: treesize reduction 152, result has 16.5 percent of original size [2021-11-02 22:58:23,549 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 190 treesize of output 195 [2021-11-02 22:58:52,017 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:58:52,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:58:52,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:58:52,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24296757] [2021-11-02 22:58:52,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:58:52,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:58:52,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:58:52,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=991, Unknown=9, NotChecked=0, Total=1122 [2021-11-02 22:58:52,019 INFO L87 Difference]: Start difference. First operand 518 states and 625 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:58:54,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:58:54,348 INFO L93 Difference]: Finished difference Result 738 states and 880 transitions. [2021-11-02 22:58:54,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:58:54,349 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-02 22:58:54,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:58:54,353 INFO L225 Difference]: With dead ends: 738 [2021-11-02 22:58:54,353 INFO L226 Difference]: Without dead ends: 738 [2021-11-02 22:58:54,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=393, Invalid=2678, Unknown=9, NotChecked=0, Total=3080 [2021-11-02 22:58:54,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 738 states. [2021-11-02 22:58:54,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 738 to 559. [2021-11-02 22:58:54,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 535 states have (on average 1.250467289719626) internal successors, (669), 555 states have internal predecessors, (669), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:58:54,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 672 transitions. [2021-11-02 22:58:54,363 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 672 transitions. Word has length 50 [2021-11-02 22:58:54,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:58:54,363 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 672 transitions. [2021-11-02 22:58:54,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:58:54,363 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 672 transitions. [2021-11-02 22:58:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 22:58:54,364 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:58:54,364 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:58:54,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 22:58:54,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-02 22:58:54,578 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:58:54,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:58:54,579 INFO L85 PathProgramCache]: Analyzing trace with hash -612692621, now seen corresponding path program 1 times [2021-11-02 22:58:54,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:58:54,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970229968] [2021-11-02 22:58:54,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:54,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:58:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:55,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:58:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:55,364 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:58:55,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:58:55,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970229968] [2021-11-02 22:58:55,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970229968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:58:55,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17445224] [2021-11-02 22:58:55,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:58:55,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:58:55,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:58:55,367 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:58:55,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 22:58:57,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:58:57,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 22:58:57,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:58:57,405 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 [2021-11-02 22:58:57,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:58:57,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:58:57,666 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:58:57,667 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 17 treesize of output 21 [2021-11-02 22:58:57,826 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:58:57,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:58:57,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:58:57,845 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 30 treesize of output 29 [2021-11-02 22:58:58,201 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 22:58:58,201 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 48 treesize of output 42 [2021-11-02 22:58:58,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 22:58:58,501 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-02 22:58:58,501 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 36 treesize of output 23 [2021-11-02 22:58:58,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:58:58,520 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-02 22:58:58,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 36 [2021-11-02 22:58:58,578 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-02 22:58:58,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 45 [2021-11-02 22:58:58,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:58:58,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 32 [2021-11-02 22:58:58,855 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-02 22:58:58,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-02 22:58:59,005 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 22:58:59,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 55 treesize of output 56 [2021-11-02 22:58:59,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:58:59,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 35 [2021-11-02 22:59:01,584 INFO L354 Elim1Store]: treesize reduction 184, result has 15.2 percent of original size [2021-11-02 22:59:01,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 121 treesize of output 96 [2021-11-02 22:59:01,615 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-02 22:59:01,616 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 [2021-11-02 22:59:03,809 INFO L354 Elim1Store]: treesize reduction 302, result has 11.7 percent of original size [2021-11-02 22:59:03,809 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 151 treesize of output 114 [2021-11-02 22:59:03,854 INFO L354 Elim1Store]: treesize reduction 170, result has 15.0 percent of original size [2021-11-02 22:59:03,854 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 132 treesize of output 122 [2021-11-02 22:59:04,105 INFO L354 Elim1Store]: treesize reduction 272, result has 12.8 percent of original size [2021-11-02 22:59:04,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 184 treesize of output 117 [2021-11-02 22:59:04,152 INFO L354 Elim1Store]: treesize reduction 208, result has 15.4 percent of original size [2021-11-02 22:59:04,153 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 172 treesize of output 169 [2021-11-02 22:59:30,799 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:59:30,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:59:30,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2021-11-02 22:59:30,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155740093] [2021-11-02 22:59:30,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:59:30,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:30,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:59:30,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=927, Unknown=13, NotChecked=0, Total=1056 [2021-11-02 22:59:30,802 INFO L87 Difference]: Start difference. First operand 559 states and 672 transitions. Second operand has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:59:32,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:32,894 INFO L93 Difference]: Finished difference Result 737 states and 876 transitions. [2021-11-02 22:59:32,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 22:59:32,894 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-11-02 22:59:32,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:32,900 INFO L225 Difference]: With dead ends: 737 [2021-11-02 22:59:32,900 INFO L226 Difference]: Without dead ends: 737 [2021-11-02 22:59:32,901 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 635 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=387, Invalid=2570, Unknown=13, NotChecked=0, Total=2970 [2021-11-02 22:59:32,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-11-02 22:59:32,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 517. [2021-11-02 22:59:32,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 517 states, 493 states have (on average 1.2535496957403651) internal successors, (618), 513 states have internal predecessors, (618), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:59:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 517 states to 517 states and 621 transitions. [2021-11-02 22:59:32,914 INFO L78 Accepts]: Start accepts. Automaton has 517 states and 621 transitions. Word has length 50 [2021-11-02 22:59:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:32,914 INFO L470 AbstractCegarLoop]: Abstraction has 517 states and 621 transitions. [2021-11-02 22:59:32,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.473684210526316) internal successors, (47), 18 states have internal predecessors, (47), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:59:32,915 INFO L276 IsEmpty]: Start isEmpty. Operand 517 states and 621 transitions. [2021-11-02 22:59:32,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 22:59:32,916 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:32,916 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:32,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:33,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:33,132 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr64ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:59:33,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:33,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1802695264, now seen corresponding path program 1 times [2021-11-02 22:59:33,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:33,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218852485] [2021-11-02 22:59:33,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:33,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:33,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:33,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:59:33,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:33,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:33,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:33,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218852485] [2021-11-02 22:59:33,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218852485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:33,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13351881] [2021-11-02 22:59:33,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:33,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:33,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:33,536 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:59:33,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 22:59:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 22:59:35,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:35,655 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 [2021-11-02 22:59:35,709 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:59:35,710 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 11 treesize of output 11 [2021-11-02 22:59:35,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-02 22:59:35,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 22:59:35,811 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 20 treesize of output 8 [2021-11-02 22:59:35,864 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 22:59:35,865 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 25 treesize of output 24 [2021-11-02 22:59:36,200 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-02 22:59:36,200 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 28 treesize of output 22 [2021-11-02 22:59:37,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-02 22:59:37,072 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 26 [2021-11-02 22:59:37,230 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-02 22:59:37,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 29 [2021-11-02 22:59:37,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:37,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13351881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:37,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:59:37,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-11-02 22:59:37,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707018057] [2021-11-02 22:59:37,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 22:59:37,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:37,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 22:59:37,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=664, Unknown=0, NotChecked=0, Total=756 [2021-11-02 22:59:37,446 INFO L87 Difference]: Start difference. First operand 517 states and 621 transitions. Second operand has 28 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:59:40,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:40,150 INFO L93 Difference]: Finished difference Result 527 states and 628 transitions. [2021-11-02 22:59:40,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:59:40,151 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-11-02 22:59:40,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:40,153 INFO L225 Difference]: With dead ends: 527 [2021-11-02 22:59:40,154 INFO L226 Difference]: Without dead ends: 527 [2021-11-02 22:59:40,154 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=339, Invalid=1553, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 22:59:40,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-11-02 22:59:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 518. [2021-11-02 22:59:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 494 states have (on average 1.2530364372469636) internal successors, (619), 514 states have internal predecessors, (619), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:59:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 622 transitions. [2021-11-02 22:59:40,161 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 622 transitions. Word has length 51 [2021-11-02 22:59:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:40,161 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 622 transitions. [2021-11-02 22:59:40,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 3.4074074074074074) internal successors, (92), 27 states have internal predecessors, (92), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:59:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 622 transitions. [2021-11-02 22:59:40,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:59:40,163 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:40,163 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:40,204 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-11-02 22:59:40,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-02 22:59:40,373 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:59:40,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:40,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1294720250, now seen corresponding path program 1 times [2021-11-02 22:59:40,374 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:40,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332773881] [2021-11-02 22:59:40,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:40,375 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:40,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:41,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:59:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:41,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:41,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:41,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332773881] [2021-11-02 22:59:41,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332773881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:41,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368307776] [2021-11-02 22:59:41,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:41,054 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:41,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:41,068 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:59:41,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 22:59:43,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:43,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-02 22:59:43,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:43,182 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 [2021-11-02 22:59:43,312 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 [2021-11-02 22:59:43,345 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 22:59:43,345 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 17 treesize of output 21 [2021-11-02 22:59:43,457 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 [2021-11-02 22:59:43,476 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 26 treesize of output 22 [2021-11-02 22:59:43,899 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:59:43,900 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 45 treesize of output 32 [2021-11-02 22:59:43,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:59:43,933 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 19 treesize of output 18 [2021-11-02 22:59:44,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:59:44,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:59:44,230 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:59:44,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 67 treesize of output 42 [2021-11-02 22:59:44,251 INFO L354 Elim1Store]: treesize reduction 9, result has 25.0 percent of original size [2021-11-02 22:59:44,252 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 48 treesize of output 43 [2021-11-02 22:59:44,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:59:44,285 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:59:44,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:59:44,458 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-02 22:59:44,459 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 99 treesize of output 72 [2021-11-02 22:59:44,485 INFO L354 Elim1Store]: treesize reduction 76, result has 20.0 percent of original size [2021-11-02 22:59:44,485 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 91 treesize of output 89 [2021-11-02 22:59:44,730 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 22:59:44,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 22:59:44,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2021-11-02 22:59:44,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346929378] [2021-11-02 22:59:44,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 22:59:44,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:44,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 22:59:44,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2021-11-02 22:59:44,732 INFO L87 Difference]: Start difference. First operand 518 states and 622 transitions. Second operand has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:59:47,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 22:59:47,337 INFO L93 Difference]: Finished difference Result 853 states and 1027 transitions. [2021-11-02 22:59:47,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 22:59:47,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-11-02 22:59:47,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 22:59:47,342 INFO L225 Difference]: With dead ends: 853 [2021-11-02 22:59:47,342 INFO L226 Difference]: Without dead ends: 853 [2021-11-02 22:59:47,342 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=252, Invalid=1640, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 22:59:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-11-02 22:59:47,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 570. [2021-11-02 22:59:47,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 546 states have (on average 1.250915750915751) internal successors, (683), 566 states have internal predecessors, (683), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:59:47,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 686 transitions. [2021-11-02 22:59:47,353 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 686 transitions. Word has length 52 [2021-11-02 22:59:47,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 22:59:47,353 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 686 transitions. [2021-11-02 22:59:47,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 22:59:47,353 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 686 transitions. [2021-11-02 22:59:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 22:59:47,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 22:59:47,354 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 22:59:47,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 22:59:47,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-02 22:59:47,555 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 22:59:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 22:59:47,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1294720249, now seen corresponding path program 1 times [2021-11-02 22:59:47,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 22:59:47,556 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994224487] [2021-11-02 22:59:47,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:47,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 22:59:47,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:48,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 22:59:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:48,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:48,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 22:59:48,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994224487] [2021-11-02 22:59:48,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994224487] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:48,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784387977] [2021-11-02 22:59:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 22:59:48,346 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 22:59:48,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 22:59:48,356 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 22:59:48,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 22:59:50,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 22:59:50,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 22:59:50,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 22:59:50,578 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 [2021-11-02 22:59:50,684 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 [2021-11-02 22:59:50,699 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 22:59:50,699 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 11 treesize of output 11 [2021-11-02 22:59:50,776 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 21 treesize of output 17 [2021-11-02 22:59:50,792 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 [2021-11-02 22:59:51,087 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 22:59:51,087 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 36 treesize of output 27 [2021-11-02 22:59:51,104 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:59:51,105 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 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-02 22:59:51,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:59:51,355 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:59:51,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-02 22:59:51,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 22:59:51,369 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:59:51,369 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 58 treesize of output 37 [2021-11-02 22:59:51,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 27 [2021-11-02 22:59:51,503 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-02 22:59:51,504 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 80 treesize of output 57 [2021-11-02 22:59:51,512 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-02 22:59:51,513 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 71 treesize of output 69 [2021-11-02 22:59:53,333 INFO L354 Elim1Store]: treesize reduction 110, result has 6.0 percent of original size [2021-11-02 22:59:53,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 101 treesize of output 77 [2021-11-02 22:59:53,365 INFO L354 Elim1Store]: treesize reduction 90, result has 7.2 percent of original size [2021-11-02 22:59:53,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 62 treesize of output 38 [2021-11-02 22:59:53,486 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 22:59:53,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784387977] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 22:59:53,486 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 22:59:53,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 31 [2021-11-02 22:59:53,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678262950] [2021-11-02 22:59:53,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 22:59:53,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 22:59:53,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 22:59:53,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=833, Unknown=0, NotChecked=0, Total=930 [2021-11-02 22:59:53,488 INFO L87 Difference]: Start difference. First operand 570 states and 686 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:00:00,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:00,220 INFO L93 Difference]: Finished difference Result 839 states and 1001 transitions. [2021-11-02 23:00:00,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:00:00,221 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-11-02 23:00:00,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:00,224 INFO L225 Difference]: With dead ends: 839 [2021-11-02 23:00:00,225 INFO L226 Difference]: Without dead ends: 839 [2021-11-02 23:00:00,225 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 967 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=511, Invalid=3395, Unknown=0, NotChecked=0, Total=3906 [2021-11-02 23:00:00,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2021-11-02 23:00:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 564. [2021-11-02 23:00:00,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 540 states have (on average 1.2425925925925927) internal successors, (671), 560 states have internal predecessors, (671), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:00:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 674 transitions. [2021-11-02 23:00:00,236 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 674 transitions. Word has length 52 [2021-11-02 23:00:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:00,236 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 674 transitions. [2021-11-02 23:00:00,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:00:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 674 transitions. [2021-11-02 23:00:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:00:00,237 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:00,237 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:00,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:00,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:00,440 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 23:00:00,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:00,440 INFO L85 PathProgramCache]: Analyzing trace with hash -693473701, now seen corresponding path program 2 times [2021-11-02 23:00:00,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:00,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533359648] [2021-11-02 23:00:00,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:00,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:01,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:00:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:01,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:01,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533359648] [2021-11-02 23:00:01,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533359648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:01,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752771941] [2021-11-02 23:00:01,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:00:01,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:01,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:01,423 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:01,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:00:03,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:00:03,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:00:03,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-02 23:00:03,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:03,709 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 [2021-11-02 23:00:03,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:00:03,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:00:03,870 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:00:03,871 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 11 treesize of output 11 [2021-11-02 23:00:03,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:03,945 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 25 treesize of output 24 [2021-11-02 23:00:03,961 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:03,961 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-02 23:00:04,314 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 23:00:04,314 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 68 treesize of output 70 [2021-11-02 23:00:04,340 INFO L354 Elim1Store]: treesize reduction 64, result has 21.0 percent of original size [2021-11-02 23:00:04,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 64 treesize of output 62 [2021-11-02 23:00:04,622 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 23:00:04,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 90 treesize of output 80 [2021-11-02 23:00:04,638 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-02 23:00:04,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 71 treesize of output 61 [2021-11-02 23:00:04,713 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-02 23:00:04,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 78 treesize of output 83 [2021-11-02 23:00:04,735 INFO L354 Elim1Store]: treesize reduction 31, result has 18.4 percent of original size [2021-11-02 23:00:04,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 79 [2021-11-02 23:00:04,946 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:00:04,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-11-02 23:00:05,100 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 23:00:05,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 96 treesize of output 97 [2021-11-02 23:00:05,119 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 23:00:05,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 82 treesize of output 83 [2021-11-02 23:00:05,663 INFO L354 Elim1Store]: treesize reduction 166, result has 23.5 percent of original size [2021-11-02 23:00:05,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 114 treesize of output 119 [2021-11-02 23:00:05,718 INFO L354 Elim1Store]: treesize reduction 130, result has 25.3 percent of original size [2021-11-02 23:00:05,719 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 128 treesize of output 147 [2021-11-02 23:00:10,386 INFO L354 Elim1Store]: treesize reduction 182, result has 19.5 percent of original size [2021-11-02 23:00:10,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 11 case distinctions, treesize of input 172 treesize of output 163 [2021-11-02 23:00:10,437 INFO L354 Elim1Store]: treesize reduction 130, result has 21.2 percent of original size [2021-11-02 23:00:10,438 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 187 treesize of output 194 [2021-11-02 23:00:11,882 INFO L354 Elim1Store]: treesize reduction 272, result has 12.8 percent of original size [2021-11-02 23:00:11,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 203 treesize of output 177 [2021-11-02 23:00:11,948 INFO L354 Elim1Store]: treesize reduction 220, result has 14.4 percent of original size [2021-11-02 23:00:11,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 199 treesize of output 207 [2021-11-02 23:00:32,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 23:00:32,607 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:00:32,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2021-11-02 23:00:32,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622446740] [2021-11-02 23:00:32,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:00:32,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:32,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:00:32,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=854, Unknown=11, NotChecked=0, Total=1056 [2021-11-02 23:00:32,609 INFO L87 Difference]: Start difference. First operand 564 states and 674 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:00:34,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:34,966 INFO L93 Difference]: Finished difference Result 667 states and 781 transitions. [2021-11-02 23:00:34,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:00:34,967 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-11-02 23:00:34,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:34,970 INFO L225 Difference]: With dead ends: 667 [2021-11-02 23:00:34,970 INFO L226 Difference]: Without dead ends: 667 [2021-11-02 23:00:34,970 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 5 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=378, Invalid=1867, Unknown=11, NotChecked=0, Total=2256 [2021-11-02 23:00:34,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-11-02 23:00:34,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 571. [2021-11-02 23:00:34,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 547 states have (on average 1.2394881170018281) internal successors, (678), 567 states have internal predecessors, (678), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:00:34,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 681 transitions. [2021-11-02 23:00:34,979 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 681 transitions. Word has length 52 [2021-11-02 23:00:34,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:34,979 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 681 transitions. [2021-11-02 23:00:34,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:00:34,980 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 681 transitions. [2021-11-02 23:00:34,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:00:34,980 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:34,981 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:35,014 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:35,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-02 23:00:35,181 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting mainErr50ASSERT_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 23:00:35,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:35,182 INFO L85 PathProgramCache]: Analyzing trace with hash -98157563, now seen corresponding path program 1 times [2021-11-02 23:00:35,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:35,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265923728] [2021-11-02 23:00:35,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:35,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:35,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:36,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:00:36,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:36,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:36,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:36,582 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265923728] [2021-11-02 23:00:36,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265923728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:36,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194941785] [2021-11-02 23:00:36,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:36,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:36,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:36,592 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:36,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:00:38,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:38,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-02 23:00:38,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:00:39,012 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 [2021-11-02 23:00:39,100 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:00:39,100 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 17 treesize of output 21 [2021-11-02 23:00:39,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:00:39,189 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 23 treesize of output 19 [2021-11-02 23:00:39,304 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 23:00:39,304 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 126 treesize of output 74 [2021-11-02 23:00:39,341 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 23:00:39,341 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 147 treesize of output 134 [2021-11-02 23:00:39,756 INFO L354 Elim1Store]: treesize reduction 8, result has 65.2 percent of original size [2021-11-02 23:00:39,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 24 [2021-11-02 23:00:39,916 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:39,920 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:39,941 INFO L354 Elim1Store]: treesize reduction 43, result has 23.2 percent of original size [2021-11-02 23:00:39,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 97 treesize of output 87 [2021-11-02 23:00:39,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:39,974 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:40,003 INFO L354 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2021-11-02 23:00:40,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 74 treesize of output 61 [2021-11-02 23:00:40,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:40,578 INFO L354 Elim1Store]: treesize reduction 100, result has 19.4 percent of original size [2021-11-02 23:00:40,578 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 100 treesize of output 82 [2021-11-02 23:00:40,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:40,621 INFO L354 Elim1Store]: treesize reduction 72, result has 24.2 percent of original size [2021-11-02 23:00:40,622 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 88 treesize of output 90 [2021-11-02 23:00:40,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:40,971 INFO L354 Elim1Store]: treesize reduction 94, result has 13.8 percent of original size [2021-11-02 23:00:40,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 118 treesize of output 96 [2021-11-02 23:00:40,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:41,014 INFO L354 Elim1Store]: treesize reduction 96, result has 17.9 percent of original size [2021-11-02 23:00:41,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 99 treesize of output 89 [2021-11-02 23:00:41,104 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:00:41,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-11-02 23:00:41,302 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:41,341 INFO L354 Elim1Store]: treesize reduction 82, result has 15.5 percent of original size [2021-11-02 23:00:41,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 110 treesize of output 103 [2021-11-02 23:00:41,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:41,385 INFO L354 Elim1Store]: treesize reduction 84, result has 20.0 percent of original size [2021-11-02 23:00:41,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 103 treesize of output 108 [2021-11-02 23:00:41,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:41,969 INFO L354 Elim1Store]: treesize reduction 236, result has 17.5 percent of original size [2021-11-02 23:00:41,970 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 202 treesize of output 149 [2021-11-02 23:00:41,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:00:42,046 INFO L354 Elim1Store]: treesize reduction 244, result has 16.2 percent of original size [2021-11-02 23:00:42,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 185 treesize of output 166 [2021-11-02 23:00:51,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 23:00:51,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:00:51,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2021-11-02 23:00:51,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553665319] [2021-11-02 23:00:51,377 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:00:51,377 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:00:51,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:00:51,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=986, Unknown=4, NotChecked=0, Total=1122 [2021-11-02 23:00:51,378 INFO L87 Difference]: Start difference. First operand 571 states and 681 transitions. Second operand has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:00:58,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:00:58,626 INFO L93 Difference]: Finished difference Result 849 states and 1016 transitions. [2021-11-02 23:00:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:00:58,627 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2021-11-02 23:00:58,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:00:58,631 INFO L225 Difference]: With dead ends: 849 [2021-11-02 23:00:58,631 INFO L226 Difference]: Without dead ends: 849 [2021-11-02 23:00:58,632 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 25 SyntacticMatches, 6 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=571, Invalid=3579, Unknown=10, NotChecked=0, Total=4160 [2021-11-02 23:00:58,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2021-11-02 23:00:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 568. [2021-11-02 23:00:58,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 544 states have (on average 1.2371323529411764) internal successors, (673), 564 states have internal predecessors, (673), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:00:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 676 transitions. [2021-11-02 23:00:58,641 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 676 transitions. Word has length 53 [2021-11-02 23:00:58,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:00:58,642 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 676 transitions. [2021-11-02 23:00:58,642 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:00:58,642 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 676 transitions. [2021-11-02 23:00:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:00:58,647 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:00:58,648 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:00:58,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:00:58,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:58,848 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting mainErr65ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 23:00:58,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:00:58,849 INFO L85 PathProgramCache]: Analyzing trace with hash -176232858, now seen corresponding path program 1 times [2021-11-02 23:00:58,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:00:58,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111925513] [2021-11-02 23:00:58,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:58,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:00:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:59,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:00:59,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:00:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:00:59,911 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:00:59,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111925513] [2021-11-02 23:00:59,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111925513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:00:59,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930879417] [2021-11-02 23:00:59,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:00:59,912 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:00:59,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:00:59,924 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:00:59,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:01:02,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:02,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:01:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:02,701 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 31 treesize of output 27 [2021-11-02 23:01:02,884 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 23:01:02,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 53 treesize of output 37 [2021-11-02 23:01:03,848 INFO L354 Elim1Store]: treesize reduction 29, result has 21.6 percent of original size [2021-11-02 23:01:03,848 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 46 treesize of output 35 [2021-11-02 23:01:04,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:04,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930879417] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:04,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:01:04,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-11-02 23:01:04,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603077092] [2021-11-02 23:01:04,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:01:04,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:04,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:01:04,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:01:04,409 INFO L87 Difference]: Start difference. First operand 568 states and 676 transitions. Second operand has 26 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:01:07,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:07,211 INFO L93 Difference]: Finished difference Result 574 states and 681 transitions. [2021-11-02 23:01:07,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:01:07,211 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-11-02 23:01:07,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:07,214 INFO L225 Difference]: With dead ends: 574 [2021-11-02 23:01:07,214 INFO L226 Difference]: Without dead ends: 539 [2021-11-02 23:01:07,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:01:07,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-11-02 23:01:07,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 539. [2021-11-02 23:01:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 515 states have (on average 1.2485436893203883) internal successors, (643), 535 states have internal predecessors, (643), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:01:07,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 646 transitions. [2021-11-02 23:01:07,222 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 646 transitions. Word has length 54 [2021-11-02 23:01:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:07,223 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 646 transitions. [2021-11-02 23:01:07,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 4.04) internal successors, (101), 25 states have internal predecessors, (101), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:01:07,223 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 646 transitions. [2021-11-02 23:01:07,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:01:07,224 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:07,224 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:07,278 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:07,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-02 23:01:07,452 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting mainErr46REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 23:01:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:07,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1370999530, now seen corresponding path program 2 times [2021-11-02 23:01:07,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:07,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685475187] [2021-11-02 23:01:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:07,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:07,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:08,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:01:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:08,497 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:08,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:08,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685475187] [2021-11-02 23:01:08,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685475187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:08,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162577170] [2021-11-02 23:01:08,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:08,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:08,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:08,499 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:08,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:01:11,161 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:11,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:11,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 23:01:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:11,185 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 [2021-11-02 23:01:11,252 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-02 23:01:11,252 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 17 treesize of output 21 [2021-11-02 23:01:11,324 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 23 treesize of output 19 [2021-11-02 23:01:11,455 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 23:01:11,455 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 45 treesize of output 29 [2021-11-02 23:01:11,759 INFO L354 Elim1Store]: treesize reduction 54, result has 36.5 percent of original size [2021-11-02 23:01:11,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 28 treesize of output 45 [2021-11-02 23:01:11,964 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:01:11,979 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-02 23:01:11,979 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 2 case distinctions, treesize of input 65 treesize of output 52 [2021-11-02 23:01:12,476 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-02 23:01:12,476 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 87 treesize of output 65 [2021-11-02 23:01:12,842 INFO L354 Elim1Store]: treesize reduction 108, result has 12.2 percent of original size [2021-11-02 23:01:12,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 81 treesize of output 59 [2021-11-02 23:01:12,945 INFO L354 Elim1Store]: treesize reduction 96, result has 13.5 percent of original size [2021-11-02 23:01:12,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 68 [2021-11-02 23:01:13,275 INFO L354 Elim1Store]: treesize reduction 72, result has 35.7 percent of original size [2021-11-02 23:01:13,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 33 treesize of output 57 [2021-11-02 23:01:13,526 INFO L354 Elim1Store]: treesize reduction 118, result has 12.6 percent of original size [2021-11-02 23:01:13,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 105 treesize of output 88 [2021-11-02 23:01:33,233 INFO L354 Elim1Store]: treesize reduction 260, result has 13.3 percent of original size [2021-11-02 23:01:33,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 167 treesize of output 104 [2021-11-02 23:01:34,697 INFO L354 Elim1Store]: treesize reduction 400, result has 10.5 percent of original size [2021-11-02 23:01:34,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 182 treesize of output 107 [2021-11-02 23:01:34,954 INFO L354 Elim1Store]: treesize reduction 364, result has 11.4 percent of original size [2021-11-02 23:01:34,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 197 treesize of output 116 [2021-11-02 23:01:49,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~x~0.offset] [2021-11-02 23:01:49,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:01:49,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2021-11-02 23:01:49,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664315579] [2021-11-02 23:01:49,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:01:49,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:01:49,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:01:49,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1212, Unknown=16, NotChecked=0, Total=1482 [2021-11-02 23:01:49,875 INFO L87 Difference]: Start difference. First operand 539 states and 646 transitions. Second operand has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:01:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:01:53,770 INFO L93 Difference]: Finished difference Result 907 states and 1089 transitions. [2021-11-02 23:01:53,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:01:53,771 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-11-02 23:01:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:01:53,775 INFO L225 Difference]: With dead ends: 907 [2021-11-02 23:01:53,775 INFO L226 Difference]: Without dead ends: 907 [2021-11-02 23:01:53,776 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 37.9s TimeCoverageRelationStatistics Valid=886, Invalid=4354, Unknown=16, NotChecked=0, Total=5256 [2021-11-02 23:01:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-11-02 23:01:53,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 564. [2021-11-02 23:01:53,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 540 states have (on average 1.2481481481481482) internal successors, (674), 560 states have internal predecessors, (674), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:01:53,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 677 transitions. [2021-11-02 23:01:53,786 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 677 transitions. Word has length 54 [2021-11-02 23:01:53,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:01:53,786 INFO L470 AbstractCegarLoop]: Abstraction has 564 states and 677 transitions. [2021-11-02 23:01:53,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-02 23:01:53,786 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 677 transitions. [2021-11-02 23:01:53,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:01:53,787 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:01:53,787 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:01:53,822 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 23:01:53,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-02 23:01:53,988 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting mainErr47REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 61 more)] === [2021-11-02 23:01:53,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:01:53,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1370999531, now seen corresponding path program 2 times [2021-11-02 23:01:53,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:01:53,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959458534] [2021-11-02 23:01:53,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:01:53,989 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:01:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:55,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-02 23:01:55,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:01:55,090 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:01:55,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:01:55,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959458534] [2021-11-02 23:01:55,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959458534] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:01:55,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504632959] [2021-11-02 23:01:55,091 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:01:55,091 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:01:55,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:01:55,092 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:01:55,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ead06196-ce15-4223-8eaf-f0cfbe55f8c3/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:01:57,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:01:57,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:01:57,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-02 23:01:57,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:01:57,998 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 [2021-11-02 23:01:58,052 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:01:58,053 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 11 treesize of output 11 [2021-11-02 23:01:58,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 6 treesize of output 5 [2021-11-02 23:01:58,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-11-02 23:01:58,091 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 23 treesize of output 19 [2021-11-02 23:01:58,243 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-11-02 23:01:58,243 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 49 [2021-11-02 23:01:58,261 INFO L354 Elim1Store]: treesize reduction 43, result has 17.3 percent of original size [2021-11-02 23:01:58,262 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 67 treesize of output 60 [2021-11-02 23:01:58,611 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:01:58,612 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 11 treesize of output 11 [2021-11-02 23:01:58,643 INFO L354 Elim1Store]: treesize reduction 33, result has 25.0 percent of original size [2021-11-02 23:01:58,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 20 [2021-11-02 23:01:58,841 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:01:58,859 INFO L354 Elim1Store]: treesize reduction 63, result has 17.1 percent of original size [2021-11-02 23:01:58,859 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 2 case distinctions, treesize of input 88 treesize of output 90 [2021-11-02 23:01:58,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-02 23:01:58,880 INFO L354 Elim1Store]: treesize reduction 39, result has 15.2 percent of original size [2021-11-02 23:01:58,880 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 2 case distinctions, treesize of input 77 treesize of output 64 [2021-11-02 23:01:59,434 INFO L354 Elim1Store]: treesize reduction 114, result has 17.4 percent of original size [2021-11-02 23:01:59,435 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 106 treesize of output 88 [2021-11-02 23:01:59,469 INFO L354 Elim1Store]: treesize reduction 92, result has 20.0 percent of original size [2021-11-02 23:01:59,470 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 94 treesize of output 96 [2021-11-02 23:01:59,941 INFO L354 Elim1Store]: treesize reduction 98, result has 20.3 percent of original size [2021-11-02 23:01:59,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 119 treesize of output 107 [2021-11-02 23:01:59,993 INFO L354 Elim1Store]: treesize reduction 100, result has 27.0 percent of original size [2021-11-02 23:01:59,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 122 [2021-11-02 23:02:00,260 INFO L354 Elim1Store]: treesize reduction 86, result has 22.5 percent of original size [2021-11-02 23:02:00,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 107 treesize of output 110 [2021-11-02 23:02:00,307 INFO L354 Elim1Store]: treesize reduction 88, result has 29.6 percent of original size [2021-11-02 23:02:00,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 119 treesize of output 140 [2021-11-02 23:02:00,755 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-02 23:02:00,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 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 11 treesize of output 11 [2021-11-02 23:02:00,851 INFO L354 Elim1Store]: treesize reduction 60, result has 22.1 percent of original size [2021-11-02 23:02:00,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 28 [2021-11-02 23:02:01,149 INFO L354 Elim1Store]: treesize reduction 110, result has 18.5 percent of original size [2021-11-02 23:02:01,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 162 treesize of output 147 [2021-11-02 23:02:01,229 INFO L354 Elim1Store]: treesize reduction 118, result has 23.9 percent of original size [2021-11-02 23:02:01,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 169 treesize of output 184 [2021-11-02 23:02:09,063 INFO L354 Elim1Store]: treesize reduction 208, result has 30.7 percent of original size [2021-11-02 23:02:09,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 239 treesize of output 214 [2021-11-02 23:02:09,175 INFO L354 Elim1Store]: treesize reduction 126, result has 41.1 percent of original size [2021-11-02 23:02:09,176 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 312 treesize of output 369 [2021-11-02 23:03:00,153 INFO L354 Elim1Store]: treesize reduction 244, result has 26.3 percent of original size [2021-11-02 23:03:00,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 17 case distinctions, treesize of input 284 treesize of output 255 [2021-11-02 23:03:00,271 INFO L354 Elim1Store]: treesize reduction 176, result has 33.3 percent of original size [2021-11-02 23:03:00,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 364 treesize of output 411 [2021-11-02 23:04:16,043 INFO L354 Elim1Store]: treesize reduction 328, result has 20.2 percent of original size [2021-11-02 23:04:16,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 476 treesize of output 356 [2021-11-02 23:04:16,206 INFO L354 Elim1Store]: treesize reduction 220, result has 27.4 percent of original size [2021-11-02 23:04:16,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 10 case distinctions, treesize of input 545 treesize of output 583