./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL --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 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 05:01:21,666 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 05:01:21,669 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 05:01:21,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 05:01:21,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 05:01:21,747 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 05:01:21,752 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 05:01:21,757 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 05:01:21,762 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 05:01:21,772 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 05:01:21,774 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 05:01:21,776 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 05:01:21,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 05:01:21,781 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 05:01:21,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 05:01:21,788 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 05:01:21,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 05:01:21,794 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 05:01:21,801 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 05:01:21,804 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 05:01:21,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 05:01:21,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 05:01:21,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 05:01:21,818 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 05:01:21,829 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 05:01:21,830 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 05:01:21,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 05:01:21,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 05:01:21,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 05:01:21,836 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 05:01:21,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 05:01:21,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 05:01:21,838 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 05:01:21,839 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 05:01:21,840 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 05:01:21,841 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 05:01:21,842 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 05:01:21,842 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 05:01:21,842 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 05:01:21,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 05:01:21,844 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 05:01:21,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-19 05:01:21,878 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 05:01:21,878 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 05:01:21,879 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-19 05:01:21,879 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-19 05:01:21,880 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 05:01:21,880 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 05:01:21,881 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-19 05:01:21,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-19 05:01:21,882 INFO L138 SettingsManager]: * Use SBE=true [2021-11-19 05:01:21,882 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 05:01:21,882 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 05:01:21,883 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-19 05:01:21,883 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 05:01:21,883 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 05:01:21,883 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 05:01:21,884 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-19 05:01:21,884 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-19 05:01:21,884 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-19 05:01:21,884 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 05:01:21,885 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 05:01:21,885 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 05:01:21,885 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 05:01:21,886 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 05:01:21,886 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-19 05:01:21,886 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 05:01:21,887 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:01:21,887 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 05:01:21,887 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 05:01:21,888 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-19 05:01:21,888 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 05:01:21,888 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 05:01:21,888 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_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f4570e8b350d1c6ecce62e4659f1c324ac9794563382f5f25c3525057748138 [2021-11-19 05:01:22,240 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 05:01:22,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 05:01:22,266 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 05:01:22,267 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 05:01:22,268 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 05:01:22,270 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/../../sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-11-19 05:01:22,359 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/data/cc128c06e/b2c4ecad5df441bbb80d7bfc72e7cf44/FLAG5e7e025cc [2021-11-19 05:01:23,017 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 05:01:23,018 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/sv-benchmarks/c/array-memsafety/cstrpbrk-alloca-2.i [2021-11-19 05:01:23,050 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/data/cc128c06e/b2c4ecad5df441bbb80d7bfc72e7cf44/FLAG5e7e025cc [2021-11-19 05:01:23,281 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/data/cc128c06e/b2c4ecad5df441bbb80d7bfc72e7cf44 [2021-11-19 05:01:23,285 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 05:01:23,286 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-19 05:01:23,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 05:01:23,289 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 05:01:23,316 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 05:01:23,317 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:01:23" (1/1) ... [2021-11-19 05:01:23,320 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5735bb82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23, skipping insertion in model container [2021-11-19 05:01:23,321 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 05:01:23" (1/1) ... [2021-11-19 05:01:23,329 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 05:01:23,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 05:01:23,759 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:01:23,769 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 05:01:23,822 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 05:01:23,857 INFO L208 MainTranslator]: Completed translation [2021-11-19 05:01:23,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23 WrapperNode [2021-11-19 05:01:23,858 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 05:01:23,859 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 05:01:23,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 05:01:23,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 05:01:23,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23" (1/1) ... [2021-11-19 05:01:23,873 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23" (1/1) ... [2021-11-19 05:01:23,888 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23" (1/1) ... [2021-11-19 05:01:23,889 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23" (1/1) ... [2021-11-19 05:01:23,908 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23" (1/1) ... [2021-11-19 05:01:23,914 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23" (1/1) ... [2021-11-19 05:01:23,919 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23" (1/1) ... [2021-11-19 05:01:23,926 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 05:01:23,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 05:01:23,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 05:01:23,928 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 05:01:23,929 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23" (1/1) ... [2021-11-19 05:01:23,940 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 05:01:23,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:23,969 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 05:01:23,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 05:01:24,038 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-19 05:01:24,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 05:01:24,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-19 05:01:24,039 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-19 05:01:24,040 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-19 05:01:24,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-19 05:01:24,041 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-19 05:01:24,042 INFO L138 BoogieDeclarations]: Found implementation of procedure cstrpbrk [2021-11-19 05:01:24,042 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-19 05:01:24,043 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-19 05:01:24,043 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-19 05:01:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-19 05:01:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-19 05:01:24,044 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-19 05:01:24,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-19 05:01:24,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-19 05:01:24,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-19 05:01:24,045 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-19 05:01:24,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-19 05:01:24,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-19 05:01:24,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-19 05:01:24,046 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-19 05:01:24,047 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-19 05:01:24,047 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-19 05:01:24,047 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-19 05:01:24,047 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-19 05:01:24,048 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-19 05:01:24,048 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-19 05:01:24,048 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-19 05:01:24,049 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-19 05:01:24,049 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-19 05:01:24,049 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-19 05:01:24,049 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-19 05:01:24,050 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-19 05:01:24,050 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-19 05:01:24,050 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-19 05:01:24,050 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-19 05:01:24,051 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-19 05:01:24,051 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-19 05:01:24,051 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-19 05:01:24,051 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-19 05:01:24,051 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-19 05:01:24,052 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-19 05:01:24,052 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-19 05:01:24,052 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-19 05:01:24,052 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-19 05:01:24,053 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-19 05:01:24,053 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-19 05:01:24,054 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-19 05:01:24,054 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-19 05:01:24,054 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-19 05:01:24,055 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-19 05:01:24,056 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-19 05:01:24,056 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-19 05:01:24,056 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-19 05:01:24,056 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-19 05:01:24,056 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-19 05:01:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-19 05:01:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-19 05:01:24,057 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-19 05:01:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-19 05:01:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-19 05:01:24,058 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-19 05:01:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-19 05:01:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-19 05:01:24,059 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-19 05:01:24,061 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-19 05:01:24,061 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-19 05:01:24,062 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-19 05:01:24,063 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-19 05:01:24,063 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-19 05:01:24,063 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-19 05:01:24,064 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-19 05:01:24,064 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-19 05:01:24,064 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-19 05:01:24,064 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-19 05:01:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-19 05:01:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-19 05:01:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-19 05:01:24,065 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-19 05:01:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-19 05:01:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-19 05:01:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-19 05:01:24,066 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-19 05:01:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-19 05:01:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-19 05:01:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-19 05:01:24,067 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-19 05:01:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-19 05:01:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-19 05:01:24,068 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-19 05:01:24,069 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-19 05:01:24,070 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-19 05:01:24,070 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-19 05:01:24,070 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-19 05:01:24,070 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-19 05:01:24,071 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-19 05:01:24,071 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-19 05:01:24,071 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-19 05:01:24,071 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-19 05:01:24,072 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-19 05:01:24,072 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-19 05:01:24,072 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-19 05:01:24,072 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-19 05:01:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-19 05:01:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-19 05:01:24,073 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-19 05:01:24,074 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-19 05:01:24,074 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-19 05:01:24,074 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-19 05:01:24,075 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-19 05:01:24,075 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-19 05:01:24,076 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-19 05:01:24,077 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-19 05:01:24,077 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-19 05:01:24,077 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-19 05:01:24,077 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-19 05:01:24,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2021-11-19 05:01:24,078 INFO L130 BoogieDeclarations]: Found specification of procedure cstrpbrk [2021-11-19 05:01:24,078 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-19 05:01:24,078 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-19 05:01:24,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-19 05:01:24,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-19 05:01:24,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-19 05:01:24,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-19 05:01:24,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 05:01:24,438 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 05:01:24,441 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 05:01:24,705 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 05:01:24,715 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 05:01:24,715 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-19 05:01:24,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:01:24 BoogieIcfgContainer [2021-11-19 05:01:24,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 05:01:24,721 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 05:01:24,721 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 05:01:24,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 05:01:24,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 05:01:23" (1/3) ... [2021-11-19 05:01:24,732 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3265d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:01:24, skipping insertion in model container [2021-11-19 05:01:24,733 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 05:01:23" (2/3) ... [2021-11-19 05:01:24,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a3265d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 05:01:24, skipping insertion in model container [2021-11-19 05:01:24,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 05:01:24" (3/3) ... [2021-11-19 05:01:24,736 INFO L111 eAbstractionObserver]: Analyzing ICFG cstrpbrk-alloca-2.i [2021-11-19 05:01:24,743 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 05:01:24,743 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2021-11-19 05:01:24,803 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 05:01:24,812 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 [2021-11-19 05:01:24,813 INFO L340 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2021-11-19 05:01:24,840 INFO L276 IsEmpty]: Start isEmpty. Operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-11-19 05:01:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 05:01:24,850 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:24,851 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:24,852 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:24,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:24,858 INFO L85 PathProgramCache]: Analyzing trace with hash -1363313202, now seen corresponding path program 1 times [2021-11-19 05:01:24,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:24,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470836321] [2021-11-19 05:01:24,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:24,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:24,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:25,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:25,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:25,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:25,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470836321] [2021-11-19 05:01:25,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470836321] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:25,123 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:25,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:01:25,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744123373] [2021-11-19 05:01:25,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:25,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:01:25,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:25,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:01:25,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:25,169 INFO L87 Difference]: Start difference. First operand has 62 states, 36 states have (on average 1.8611111111111112) internal successors, (67), 55 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-19 05:01:25,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:25,377 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2021-11-19 05:01:25,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:01:25,380 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-11-19 05:01:25,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:25,392 INFO L225 Difference]: With dead ends: 83 [2021-11-19 05:01:25,392 INFO L226 Difference]: Without dead ends: 79 [2021-11-19 05:01:25,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:01:25,399 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 119 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:25,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 75 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-19 05:01:25,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 62. [2021-11-19 05:01:25,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.7105263157894737) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:25,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2021-11-19 05:01:25,455 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 11 [2021-11-19 05:01:25,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:25,456 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2021-11-19 05:01:25,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-19 05:01:25,456 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2021-11-19 05:01:25,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 05:01:25,457 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:25,458 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:25,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 05:01:25,459 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:25,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:25,489 INFO L85 PathProgramCache]: Analyzing trace with hash -1361466160, now seen corresponding path program 1 times [2021-11-19 05:01:25,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:25,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298589771] [2021-11-19 05:01:25,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:25,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:25,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:25,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:25,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:25,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:25,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298589771] [2021-11-19 05:01:25,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298589771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:25,583 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:25,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:01:25,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285228508] [2021-11-19 05:01:25,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:25,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:25,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:25,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:25,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:25,589 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-19 05:01:25,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:25,741 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2021-11-19 05:01:25,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:25,742 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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 11 [2021-11-19 05:01:25,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:25,750 INFO L225 Difference]: With dead ends: 60 [2021-11-19 05:01:25,751 INFO L226 Difference]: Without dead ends: 60 [2021-11-19 05:01:25,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:25,759 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 74 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:25,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 60 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:25,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-19 05:01:25,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-11-19 05:01:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.6578947368421053) internal successors, (63), 54 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:25,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2021-11-19 05:01:25,784 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 11 [2021-11-19 05:01:25,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:25,785 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2021-11-19 05:01:25,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 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) [2021-11-19 05:01:25,785 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2021-11-19 05:01:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-19 05:01:25,786 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:25,786 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:25,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-19 05:01:25,787 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:25,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:25,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1361466159, now seen corresponding path program 1 times [2021-11-19 05:01:25,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:25,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733949347] [2021-11-19 05:01:25,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:25,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:25,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:25,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:25,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:25,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:25,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:25,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733949347] [2021-11-19 05:01:25,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1733949347] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:25,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:25,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:25,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593379710] [2021-11-19 05:01:25,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:25,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:01:25,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:25,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:01:25,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:25,994 INFO L87 Difference]: Start difference. First operand 60 states and 68 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-19 05:01:26,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:26,255 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-11-19 05:01:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:01:26,255 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 11 [2021-11-19 05:01:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:26,260 INFO L225 Difference]: With dead ends: 80 [2021-11-19 05:01:26,260 INFO L226 Difference]: Without dead ends: 80 [2021-11-19 05:01:26,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:01:26,267 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 97 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:26,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 65 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:26,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-19 05:01:26,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 62. [2021-11-19 05:01:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.65) internal successors, (66), 56 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:26,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-11-19 05:01:26,278 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 11 [2021-11-19 05:01:26,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:26,278 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-11-19 05:01:26,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-11-19 05:01:26,284 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-11-19 05:01:26,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 05:01:26,285 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:26,286 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:26,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-19 05:01:26,286 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:26,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:26,289 INFO L85 PathProgramCache]: Analyzing trace with hash -179010490, now seen corresponding path program 1 times [2021-11-19 05:01:26,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:26,290 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100643525] [2021-11-19 05:01:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:26,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:26,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:26,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:26,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:26,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100643525] [2021-11-19 05:01:26,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100643525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:26,451 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:26,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:26,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311057285] [2021-11-19 05:01:26,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:26,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:01:26,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:26,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:01:26,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:26,455 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-19 05:01:26,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:26,600 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2021-11-19 05:01:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:01:26,602 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-11-19 05:01:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:26,605 INFO L225 Difference]: With dead ends: 61 [2021-11-19 05:01:26,605 INFO L226 Difference]: Without dead ends: 61 [2021-11-19 05:01:26,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:01:26,616 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 78 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:26,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 65 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:26,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-11-19 05:01:26,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-11-19 05:01:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 40 states have (on average 1.625) internal successors, (65), 55 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 70 transitions. [2021-11-19 05:01:26,630 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 70 transitions. Word has length 13 [2021-11-19 05:01:26,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:26,630 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 70 transitions. [2021-11-19 05:01:26,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-19 05:01:26,631 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 70 transitions. [2021-11-19 05:01:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 05:01:26,632 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:26,632 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:26,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-19 05:01:26,632 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:26,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:26,633 INFO L85 PathProgramCache]: Analyzing trace with hash -179010438, now seen corresponding path program 1 times [2021-11-19 05:01:26,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:26,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448743082] [2021-11-19 05:01:26,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:26,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:26,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:26,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:26,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448743082] [2021-11-19 05:01:26,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448743082] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:26,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:26,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:01:26,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59839874] [2021-11-19 05:01:26,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:26,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:01:26,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:26,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:01:26,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:26,751 INFO L87 Difference]: Start difference. First operand 61 states and 70 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-19 05:01:26,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:26,931 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-11-19 05:01:26,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:01:26,932 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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 13 [2021-11-19 05:01:26,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:26,934 INFO L225 Difference]: With dead ends: 81 [2021-11-19 05:01:26,934 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 05:01:26,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:01:26,937 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 84 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:26,937 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 72 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:26,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 05:01:26,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-11-19 05:01:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 51 states have (on average 1.5490196078431373) internal successors, (79), 66 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2021-11-19 05:01:26,979 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 13 [2021-11-19 05:01:26,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:26,980 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2021-11-19 05:01:26,980 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 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) [2021-11-19 05:01:26,981 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2021-11-19 05:01:26,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 05:01:26,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:26,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:26,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-19 05:01:26,983 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr2REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:26,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:26,985 INFO L85 PathProgramCache]: Analyzing trace with hash -121752136, now seen corresponding path program 1 times [2021-11-19 05:01:26,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:26,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906082125] [2021-11-19 05:01:26,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:26,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:27,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:27,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:27,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:27,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906082125] [2021-11-19 05:01:27,047 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906082125] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:27,047 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:27,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 05:01:27,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515841263] [2021-11-19 05:01:27,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:27,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:27,048 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:27,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:27,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:27,049 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-11-19 05:01:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:27,134 INFO L93 Difference]: Finished difference Result 70 states and 82 transitions. [2021-11-19 05:01:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:27,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 13 [2021-11-19 05:01:27,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:27,136 INFO L225 Difference]: With dead ends: 70 [2021-11-19 05:01:27,136 INFO L226 Difference]: Without dead ends: 70 [2021-11-19 05:01:27,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:27,137 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 66 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:27,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 59 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:27,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-19 05:01:27,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-19 05:01:27,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 64 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:27,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 82 transitions. [2021-11-19 05:01:27,146 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 82 transitions. Word has length 13 [2021-11-19 05:01:27,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:27,146 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 82 transitions. [2021-11-19 05:01:27,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2021-11-19 05:01:27,147 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 82 transitions. [2021-11-19 05:01:27,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-19 05:01:27,148 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:27,148 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:27,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-19 05:01:27,148 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:27,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:27,149 INFO L85 PathProgramCache]: Analyzing trace with hash -121752135, now seen corresponding path program 1 times [2021-11-19 05:01:27,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:27,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771682697] [2021-11-19 05:01:27,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:27,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:27,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:27,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:27,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:27,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:27,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:27,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771682697] [2021-11-19 05:01:27,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771682697] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:27,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:27,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:01:27,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917172140] [2021-11-19 05:01:27,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:27,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:01:27,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:27,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:01:27,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:01:27,240 INFO L87 Difference]: Start difference. First operand 70 states and 82 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-19 05:01:27,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:27,475 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2021-11-19 05:01:27,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:01:27,476 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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 13 [2021-11-19 05:01:27,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:27,477 INFO L225 Difference]: With dead ends: 81 [2021-11-19 05:01:27,477 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 05:01:27,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:01:27,478 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:27,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 67 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 05:01:27,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 72. [2021-11-19 05:01:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 53 states have (on average 1.509433962264151) internal successors, (80), 66 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 85 transitions. [2021-11-19 05:01:27,487 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 85 transitions. Word has length 13 [2021-11-19 05:01:27,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:27,487 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 85 transitions. [2021-11-19 05:01:27,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 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) [2021-11-19 05:01:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 85 transitions. [2021-11-19 05:01:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-19 05:01:27,489 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:27,489 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:27,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 05:01:27,490 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr7REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:27,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:27,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1254357838, now seen corresponding path program 1 times [2021-11-19 05:01:27,491 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:27,491 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871716164] [2021-11-19 05:01:27,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:27,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:27,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:27,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:27,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:27,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871716164] [2021-11-19 05:01:27,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871716164] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:27,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:27,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:27,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879825752] [2021-11-19 05:01:27,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:27,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:01:27,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:27,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:01:27,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:27,562 INFO L87 Difference]: Start difference. First operand 72 states and 85 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-19 05:01:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:27,690 INFO L93 Difference]: Finished difference Result 71 states and 84 transitions. [2021-11-19 05:01:27,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:01:27,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 14 [2021-11-19 05:01:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:27,692 INFO L225 Difference]: With dead ends: 71 [2021-11-19 05:01:27,693 INFO L226 Difference]: Without dead ends: 71 [2021-11-19 05:01:27,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:01:27,694 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 71 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:27,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 63 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-19 05:01:27,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-11-19 05:01:27,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 53 states have (on average 1.490566037735849) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:27,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 84 transitions. [2021-11-19 05:01:27,721 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 84 transitions. Word has length 14 [2021-11-19 05:01:27,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:27,722 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 84 transitions. [2021-11-19 05:01:27,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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) [2021-11-19 05:01:27,723 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 84 transitions. [2021-11-19 05:01:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-19 05:01:27,724 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:27,726 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:27,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 05:01:27,727 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:27,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 498238100, now seen corresponding path program 1 times [2021-11-19 05:01:27,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:27,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053175608] [2021-11-19 05:01:27,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:27,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:27,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:27,901 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:27,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053175608] [2021-11-19 05:01:27,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053175608] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:27,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884129904] [2021-11-19 05:01:27,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:27,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:27,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:27,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:27,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 05:01:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:28,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-19 05:01:28,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:28,239 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:01:28,240 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 05:01:28,257 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 15 treesize of output 13 [2021-11-19 05:01:28,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:28,384 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:28,707 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:28,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884129904] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:01:28,707 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:01:28,708 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2021-11-19 05:01:28,708 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044834102] [2021-11-19 05:01:28,708 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:28,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:01:28,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:28,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:01:28,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:01:28,710 INFO L87 Difference]: Start difference. First operand 71 states and 84 transitions. Second operand has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-11-19 05:01:29,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:29,157 INFO L93 Difference]: Finished difference Result 108 states and 126 transitions. [2021-11-19 05:01:29,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:01:29,158 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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 15 [2021-11-19 05:01:29,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:29,160 INFO L225 Difference]: With dead ends: 108 [2021-11-19 05:01:29,160 INFO L226 Difference]: Without dead ends: 108 [2021-11-19 05:01:29,160 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:01:29,161 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 164 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:29,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 84 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:01:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-19 05:01:29,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 66. [2021-11-19 05:01:29,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 49 states have (on average 1.4489795918367347) internal successors, (71), 60 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:29,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 76 transitions. [2021-11-19 05:01:29,168 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 76 transitions. Word has length 15 [2021-11-19 05:01:29,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:29,168 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 76 transitions. [2021-11-19 05:01:29,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 9 states have internal predecessors, (25), 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) [2021-11-19 05:01:29,169 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 76 transitions. [2021-11-19 05:01:29,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 05:01:29,170 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:29,170 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:29,219 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 05:01:29,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:29,387 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting cstrpbrkErr0REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:29,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:29,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1936156247, now seen corresponding path program 1 times [2021-11-19 05:01:29,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:29,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297323312] [2021-11-19 05:01:29,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:29,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:29,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:29,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:29,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:29,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:29,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:29,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297323312] [2021-11-19 05:01:29,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297323312] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:29,469 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:29,469 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-19 05:01:29,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816257266] [2021-11-19 05:01:29,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:29,470 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 05:01:29,470 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:29,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 05:01:29,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-19 05:01:29,471 INFO L87 Difference]: Start difference. First operand 66 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 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) [2021-11-19 05:01:29,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:29,637 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-11-19 05:01:29,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-19 05:01:29,638 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 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 17 [2021-11-19 05:01:29,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:29,640 INFO L225 Difference]: With dead ends: 64 [2021-11-19 05:01:29,640 INFO L226 Difference]: Without dead ends: 64 [2021-11-19 05:01:29,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:01:29,641 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 113 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:29,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 52 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:29,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-19 05:01:29,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-19 05:01:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-11-19 05:01:29,655 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-11-19 05:01:29,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:29,658 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-11-19 05:01:29,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 2 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) [2021-11-19 05:01:29,658 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-11-19 05:01:29,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 05:01:29,661 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:29,662 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:29,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 05:01:29,662 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:29,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:29,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1936156248, now seen corresponding path program 1 times [2021-11-19 05:01:29,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:29,664 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075730559] [2021-11-19 05:01:29,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:29,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:29,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:29,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:29,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075730559] [2021-11-19 05:01:29,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075730559] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:29,794 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:29,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-19 05:01:29,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806561202] [2021-11-19 05:01:29,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:29,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-19 05:01:29,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:29,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-19 05:01:29,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 05:01:29,797 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 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) [2021-11-19 05:01:30,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:30,050 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2021-11-19 05:01:30,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:01:30,051 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 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 17 [2021-11-19 05:01:30,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:30,054 INFO L225 Difference]: With dead ends: 86 [2021-11-19 05:01:30,055 INFO L226 Difference]: Without dead ends: 86 [2021-11-19 05:01:30,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:01:30,056 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 182 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:30,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 64 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-19 05:01:30,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 67. [2021-11-19 05:01:30,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 52 states have (on average 1.4038461538461537) internal successors, (73), 61 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:30,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-11-19 05:01:30,063 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 17 [2021-11-19 05:01:30,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:30,064 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-11-19 05:01:30,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 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) [2021-11-19 05:01:30,064 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-11-19 05:01:30,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-19 05:01:30,066 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:30,066 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:30,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 05:01:30,066 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr3REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:30,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:30,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1591790588, now seen corresponding path program 1 times [2021-11-19 05:01:30,070 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:30,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323301373] [2021-11-19 05:01:30,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:30,071 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:30,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:30,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:30,165 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:30,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323301373] [2021-11-19 05:01:30,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323301373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:30,165 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98828989] [2021-11-19 05:01:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:30,166 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:30,166 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:30,167 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:30,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 05:01:30,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:30,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-19 05:01:30,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:30,347 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:01:30,348 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:01:30,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:30,475 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:30,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98828989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:01:30,759 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:01:30,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 11 [2021-11-19 05:01:30,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307657202] [2021-11-19 05:01:30,760 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:30,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-19 05:01:30,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:30,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-19 05:01:30,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-11-19 05:01:30,761 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) [2021-11-19 05:01:31,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:31,137 INFO L93 Difference]: Finished difference Result 81 states and 93 transitions. [2021-11-19 05:01:31,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:01:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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 17 [2021-11-19 05:01:31,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:31,139 INFO L225 Difference]: With dead ends: 81 [2021-11-19 05:01:31,139 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 05:01:31,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-11-19 05:01:31,140 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:31,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 76 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:31,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 05:01:31,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 64. [2021-11-19 05:01:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 50 states have (on average 1.38) internal successors, (69), 58 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:31,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-11-19 05:01:31,145 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 17 [2021-11-19 05:01:31,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:31,145 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-11-19 05:01:31,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 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) [2021-11-19 05:01:31,146 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-11-19 05:01:31,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 05:01:31,147 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:31,147 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:31,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 05:01:31,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:31,366 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting cstrpbrkErr4REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:31,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:31,367 INFO L85 PathProgramCache]: Analyzing trace with hash 168377437, now seen corresponding path program 1 times [2021-11-19 05:01:31,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:31,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004349379] [2021-11-19 05:01:31,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:31,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:31,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:31,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:31,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:31,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:31,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004349379] [2021-11-19 05:01:31,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004349379] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:31,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:31,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 05:01:31,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141346964] [2021-11-19 05:01:31,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:31,424 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-19 05:01:31,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:31,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-19 05:01:31,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:01:31,425 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 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) [2021-11-19 05:01:31,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:31,584 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-11-19 05:01:31,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-19 05:01:31,584 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 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 21 [2021-11-19 05:01:31,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:31,585 INFO L225 Difference]: With dead ends: 64 [2021-11-19 05:01:31,585 INFO L226 Difference]: Without dead ends: 64 [2021-11-19 05:01:31,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:01:31,585 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 122 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:31,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 57 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:31,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-19 05:01:31,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 61. [2021-11-19 05:01:31,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 50 states have (on average 1.32) internal successors, (66), 55 states have internal predecessors, (66), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:31,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-11-19 05:01:31,588 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 21 [2021-11-19 05:01:31,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:31,588 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-11-19 05:01:31,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 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) [2021-11-19 05:01:31,589 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-11-19 05:01:31,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-19 05:01:31,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:31,589 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:31,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-19 05:01:31,590 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:31,590 INFO L85 PathProgramCache]: Analyzing trace with hash 168377438, now seen corresponding path program 1 times [2021-11-19 05:01:31,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:31,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958081677] [2021-11-19 05:01:31,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:31,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:31,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:31,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:31,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958081677] [2021-11-19 05:01:31,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958081677] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:31,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:31,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-19 05:01:31,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700024962] [2021-11-19 05:01:31,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:31,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:01:31,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:31,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:01:31,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:01:31,712 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 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) [2021-11-19 05:01:31,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:31,974 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2021-11-19 05:01:31,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-19 05:01:31,974 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 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 21 [2021-11-19 05:01:31,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:31,975 INFO L225 Difference]: With dead ends: 76 [2021-11-19 05:01:31,975 INFO L226 Difference]: Without dead ends: 76 [2021-11-19 05:01:31,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-11-19 05:01:31,977 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 188 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:31,977 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [188 Valid, 63 Invalid, 201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-19 05:01:31,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 68. [2021-11-19 05:01:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 62 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 80 transitions. [2021-11-19 05:01:31,981 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 80 transitions. Word has length 21 [2021-11-19 05:01:31,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:31,981 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 80 transitions. [2021-11-19 05:01:31,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 7 states have internal predecessors, (17), 2 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) [2021-11-19 05:01:31,981 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 80 transitions. [2021-11-19 05:01:31,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-19 05:01:31,982 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:31,982 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:31,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-19 05:01:31,983 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr8ENSURES_VIOLATIONMEMORY_LEAK === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:31,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:31,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1415217207, now seen corresponding path program 1 times [2021-11-19 05:01:31,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:31,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667159987] [2021-11-19 05:01:31,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:31,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:31,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:32,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:32,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2021-11-19 05:01:32,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:32,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:32,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667159987] [2021-11-19 05:01:32,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667159987] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:32,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:32,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:32,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392835292] [2021-11-19 05:01:32,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:32,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-19 05:01:32,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:32,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-19 05:01:32,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:32,053 INFO L87 Difference]: Start difference. First operand 68 states and 80 transitions. Second operand has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:32,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:32,178 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2021-11-19 05:01:32,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-19 05:01:32,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-19 05:01:32,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:32,179 INFO L225 Difference]: With dead ends: 67 [2021-11-19 05:01:32,179 INFO L226 Difference]: Without dead ends: 62 [2021-11-19 05:01:32,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-19 05:01:32,180 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 79 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:32,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 40 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-19 05:01:32,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-19 05:01:32,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 53 states have (on average 1.2830188679245282) internal successors, (68), 57 states have internal predecessors, (68), 3 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) [2021-11-19 05:01:32,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-19 05:01:32,184 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 23 [2021-11-19 05:01:32,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:32,184 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-19 05:01:32,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-19 05:01:32,184 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-19 05:01:32,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-19 05:01:32,185 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:32,185 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:32,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-19 05:01:32,186 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:32,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:32,186 INFO L85 PathProgramCache]: Analyzing trace with hash 808083893, now seen corresponding path program 1 times [2021-11-19 05:01:32,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:32,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866388046] [2021-11-19 05:01:32,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:32,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:32,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:32,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:32,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:32,233 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866388046] [2021-11-19 05:01:32,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866388046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:32,234 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:32,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 05:01:32,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667314408] [2021-11-19 05:01:32,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:32,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 05:01:32,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:32,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 05:01:32,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 05:01:32,236 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-11-19 05:01:32,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:32,305 INFO L93 Difference]: Finished difference Result 64 states and 74 transitions. [2021-11-19 05:01:32,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 05:01:32,306 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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 25 [2021-11-19 05:01:32,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:32,308 INFO L225 Difference]: With dead ends: 64 [2021-11-19 05:01:32,308 INFO L226 Difference]: Without dead ends: 64 [2021-11-19 05:01:32,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-19 05:01:32,310 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 40 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:32,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 53 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-19 05:01:32,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-19 05:01:32,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-19 05:01:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 59 states have internal predecessors, (70), 3 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) [2021-11-19 05:01:32,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2021-11-19 05:01:32,317 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 25 [2021-11-19 05:01:32,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:32,318 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2021-11-19 05:01:32,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 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) [2021-11-19 05:01:32,318 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2021-11-19 05:01:32,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 05:01:32,322 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:32,322 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:32,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-19 05:01:32,322 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:32,323 INFO L85 PathProgramCache]: Analyzing trace with hash -826319086, now seen corresponding path program 1 times [2021-11-19 05:01:32,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:32,323 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743541563] [2021-11-19 05:01:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:32,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:32,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:32,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:32,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:32,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:32,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:32,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743541563] [2021-11-19 05:01:32,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743541563] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:32,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:32,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-19 05:01:32,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552664780] [2021-11-19 05:01:32,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:32,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-19 05:01:32,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:32,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-19 05:01:32,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-19 05:01:32,531 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 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) [2021-11-19 05:01:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:32,829 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2021-11-19 05:01:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 05:01:32,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 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 27 [2021-11-19 05:01:32,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:32,831 INFO L225 Difference]: With dead ends: 77 [2021-11-19 05:01:32,831 INFO L226 Difference]: Without dead ends: 59 [2021-11-19 05:01:32,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-11-19 05:01:32,832 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 66 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 250 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:32,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 74 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 250 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:32,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-11-19 05:01:32,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-11-19 05:01:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 50 states have (on average 1.26) internal successors, (63), 54 states have internal predecessors, (63), 3 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) [2021-11-19 05:01:32,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 67 transitions. [2021-11-19 05:01:32,835 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 67 transitions. Word has length 27 [2021-11-19 05:01:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:32,835 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 67 transitions. [2021-11-19 05:01:32,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 7 states have internal predecessors, (23), 2 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) [2021-11-19 05:01:32,836 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 67 transitions. [2021-11-19 05:01:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-19 05:01:32,836 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:32,836 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:32,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-19 05:01:32,837 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:32,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:32,837 INFO L85 PathProgramCache]: Analyzing trace with hash -403617260, now seen corresponding path program 1 times [2021-11-19 05:01:32,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:32,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948743909] [2021-11-19 05:01:32,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:32,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:33,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:33,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:33,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948743909] [2021-11-19 05:01:33,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948743909] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:33,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:33,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-19 05:01:33,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090721617] [2021-11-19 05:01:33,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:33,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-19 05:01:33,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:33,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-19 05:01:33,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-19 05:01:33,030 INFO L87 Difference]: Start difference. First operand 59 states and 67 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 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) [2021-11-19 05:01:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:33,348 INFO L93 Difference]: Finished difference Result 80 states and 90 transitions. [2021-11-19 05:01:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:01:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 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 27 [2021-11-19 05:01:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:33,350 INFO L225 Difference]: With dead ends: 80 [2021-11-19 05:01:33,350 INFO L226 Difference]: Without dead ends: 67 [2021-11-19 05:01:33,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-11-19 05:01:33,351 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:33,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 76 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-11-19 05:01:33,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 61. [2021-11-19 05:01:33,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 52 states have (on average 1.25) internal successors, (65), 56 states have internal predecessors, (65), 3 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) [2021-11-19 05:01:33,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2021-11-19 05:01:33,356 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 27 [2021-11-19 05:01:33,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:33,356 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2021-11-19 05:01:33,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 8 states have internal predecessors, (23), 2 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) [2021-11-19 05:01:33,356 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2021-11-19 05:01:33,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 05:01:33,357 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:33,357 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:33,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-19 05:01:33,357 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:33,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:33,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1843673559, now seen corresponding path program 1 times [2021-11-19 05:01:33,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:33,358 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756185176] [2021-11-19 05:01:33,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:33,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:33,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:33,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:33,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:33,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:33,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:33,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756185176] [2021-11-19 05:01:33,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756185176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:33,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:33,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 05:01:33,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288678578] [2021-11-19 05:01:33,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:33,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:01:33,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:33,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:01:33,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:01:33,509 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 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) [2021-11-19 05:01:33,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:33,887 INFO L93 Difference]: Finished difference Result 81 states and 89 transitions. [2021-11-19 05:01:33,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:01:33,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 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 31 [2021-11-19 05:01:33,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:33,889 INFO L225 Difference]: With dead ends: 81 [2021-11-19 05:01:33,889 INFO L226 Difference]: Without dead ends: 81 [2021-11-19 05:01:33,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2021-11-19 05:01:33,890 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 108 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:33,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 79 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-19 05:01:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-11-19 05:01:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 69 states have (on average 1.2173913043478262) internal successors, (84), 73 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2021-11-19 05:01:33,894 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 31 [2021-11-19 05:01:33,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:33,895 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2021-11-19 05:01:33,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 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) [2021-11-19 05:01:33,896 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2021-11-19 05:01:33,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-19 05:01:33,896 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:33,897 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:33,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-11-19 05:01:33,897 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:33,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:33,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1709660053, now seen corresponding path program 1 times [2021-11-19 05:01:33,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:33,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102466176] [2021-11-19 05:01:33,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:33,899 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:34,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:34,092 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:34,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:34,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102466176] [2021-11-19 05:01:34,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102466176] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:34,094 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:34,094 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-19 05:01:34,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311852340] [2021-11-19 05:01:34,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:34,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-19 05:01:34,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:34,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-19 05:01:34,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-19 05:01:34,100 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 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) [2021-11-19 05:01:34,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:34,502 INFO L93 Difference]: Finished difference Result 103 states and 114 transitions. [2021-11-19 05:01:34,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 05:01:34,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 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 31 [2021-11-19 05:01:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:34,503 INFO L225 Difference]: With dead ends: 103 [2021-11-19 05:01:34,503 INFO L226 Difference]: Without dead ends: 103 [2021-11-19 05:01:34,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=438, Unknown=0, NotChecked=0, Total=552 [2021-11-19 05:01:34,505 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 134 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:34,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 70 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-19 05:01:34,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2021-11-19 05:01:34,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 70 states have (on average 1.2285714285714286) internal successors, (86), 74 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:34,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 91 transitions. [2021-11-19 05:01:34,509 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 91 transitions. Word has length 31 [2021-11-19 05:01:34,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:34,510 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 91 transitions. [2021-11-19 05:01:34,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.25) internal successors, (27), 11 states have internal predecessors, (27), 2 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) [2021-11-19 05:01:34,510 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 91 transitions. [2021-11-19 05:01:34,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-19 05:01:34,511 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:34,515 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:34,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-19 05:01:34,515 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:34,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:34,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1499760060, now seen corresponding path program 1 times [2021-11-19 05:01:34,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:34,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052340210] [2021-11-19 05:01:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:34,517 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:34,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:34,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:34,630 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:34,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:34,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052340210] [2021-11-19 05:01:34,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052340210] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 05:01:34,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 05:01:34,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-19 05:01:34,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960595906] [2021-11-19 05:01:34,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 05:01:34,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-19 05:01:34,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:34,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-19 05:01:34,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-11-19 05:01:34,636 INFO L87 Difference]: Start difference. First operand 80 states and 91 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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) [2021-11-19 05:01:34,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:34,994 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2021-11-19 05:01:34,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 05:01:34,995 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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 [2021-11-19 05:01:34,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:34,998 INFO L225 Difference]: With dead ends: 81 [2021-11-19 05:01:34,998 INFO L226 Difference]: Without dead ends: 56 [2021-11-19 05:01:35,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-11-19 05:01:35,002 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 306 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:35,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 80 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 306 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-19 05:01:35,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-19 05:01:35,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2021-11-19 05:01:35,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 49 states have internal predecessors, (55), 3 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) [2021-11-19 05:01:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2021-11-19 05:01:35,009 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 32 [2021-11-19 05:01:35,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:35,010 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2021-11-19 05:01:35,010 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 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) [2021-11-19 05:01:35,010 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2021-11-19 05:01:35,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-19 05:01:35,011 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:35,011 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:35,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-19 05:01:35,012 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:35,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:35,013 INFO L85 PathProgramCache]: Analyzing trace with hash 385012248, now seen corresponding path program 1 times [2021-11-19 05:01:35,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:35,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563983964] [2021-11-19 05:01:35,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:35,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:35,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:35,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:35,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:35,235 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:35,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:35,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563983964] [2021-11-19 05:01:35,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563983964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:35,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54456169] [2021-11-19 05:01:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:35,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:35,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:35,237 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:35,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 05:01:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:35,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-19 05:01:35,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:35,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:35,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:35,934 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 5 treesize of output 3 [2021-11-19 05:01:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:36,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54456169] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:01:36,009 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:01:36,009 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 24 [2021-11-19 05:01:36,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658436772] [2021-11-19 05:01:36,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:36,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-19 05:01:36,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:36,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-19 05:01:36,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2021-11-19 05:01:36,016 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand has 25 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:36,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:36,632 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-11-19 05:01:36,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-19 05:01:36,636 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2021-11-19 05:01:36,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:36,637 INFO L225 Difference]: With dead ends: 74 [2021-11-19 05:01:36,637 INFO L226 Difference]: Without dead ends: 70 [2021-11-19 05:01:36,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=181, Invalid=941, Unknown=0, NotChecked=0, Total=1122 [2021-11-19 05:01:36,639 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 258 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 563 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:36,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 109 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 563 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 05:01:36,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-19 05:01:36,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 50. [2021-11-19 05:01:36,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 3 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) [2021-11-19 05:01:36,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2021-11-19 05:01:36,642 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 35 [2021-11-19 05:01:36,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:36,642 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2021-11-19 05:01:36,643 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 21 states have (on average 3.3333333333333335) internal successors, (70), 21 states have internal predecessors, (70), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:36,643 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2021-11-19 05:01:36,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-19 05:01:36,643 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:36,644 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:36,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 05:01:36,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:36,859 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:36,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1958963042, now seen corresponding path program 1 times [2021-11-19 05:01:36,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:36,860 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289295763] [2021-11-19 05:01:36,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:36,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:36,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:37,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:37,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:37,035 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:37,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:37,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289295763] [2021-11-19 05:01:37,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289295763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:37,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410628783] [2021-11-19 05:01:37,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:37,036 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:37,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:37,043 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:37,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 05:01:37,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:37,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-19 05:01:37,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:37,243 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:01:37,244 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 05:01:37,248 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 15 treesize of output 13 [2021-11-19 05:01:37,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:37,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:37,899 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:37,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1410628783] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:01:37,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:01:37,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 20 [2021-11-19 05:01:37,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491480807] [2021-11-19 05:01:37,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:37,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-19 05:01:37,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:37,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-19 05:01:37,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-11-19 05:01:37,905 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand has 21 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:38,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:38,387 INFO L93 Difference]: Finished difference Result 91 states and 99 transitions. [2021-11-19 05:01:38,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-19 05:01:38,388 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-19 05:01:38,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:38,389 INFO L225 Difference]: With dead ends: 91 [2021-11-19 05:01:38,389 INFO L226 Difference]: Without dead ends: 91 [2021-11-19 05:01:38,389 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2021-11-19 05:01:38,390 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 270 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:38,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 87 Invalid, 419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-19 05:01:38,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-19 05:01:38,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 67. [2021-11-19 05:01:38,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 62 states have internal predecessors, (70), 3 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) [2021-11-19 05:01:38,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 74 transitions. [2021-11-19 05:01:38,394 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 74 transitions. Word has length 38 [2021-11-19 05:01:38,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:38,394 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 74 transitions. [2021-11-19 05:01:38,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 4.1) internal successors, (82), 17 states have internal predecessors, (82), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:38,394 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 74 transitions. [2021-11-19 05:01:38,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-19 05:01:38,395 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:38,395 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-19 05:01:38,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 05:01:38,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-19 05:01:38,596 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:38,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:38,596 INFO L85 PathProgramCache]: Analyzing trace with hash 950813004, now seen corresponding path program 2 times [2021-11-19 05:01:38,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:38,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527213574] [2021-11-19 05:01:38,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:38,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:38,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:38,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:38,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:38,933 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:38,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:38,933 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527213574] [2021-11-19 05:01:38,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527213574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:38,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729297142] [2021-11-19 05:01:38,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:01:38,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:38,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:38,936 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:38,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 05:01:39,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:01:39,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:01:39,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-19 05:01:39,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:39,159 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 25 treesize of output 21 [2021-11-19 05:01:40,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:01:40,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-19 05:01:40,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:40,400 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:41,225 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 36 treesize of output 34 [2021-11-19 05:01:41,230 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 46 treesize of output 42 [2021-11-19 05:01:41,248 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 38 treesize of output 30 [2021-11-19 05:01:41,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:41,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729297142] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:01:41,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:01:41,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13, 13] total 37 [2021-11-19 05:01:41,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808363825] [2021-11-19 05:01:41,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:41,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 05:01:41,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:41,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 05:01:41,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:01:41,340 INFO L87 Difference]: Start difference. First operand 67 states and 74 transitions. Second operand has 37 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:42,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:42,832 INFO L93 Difference]: Finished difference Result 118 states and 128 transitions. [2021-11-19 05:01:42,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 05:01:42,833 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2021-11-19 05:01:42,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:42,834 INFO L225 Difference]: With dead ends: 118 [2021-11-19 05:01:42,835 INFO L226 Difference]: Without dead ends: 115 [2021-11-19 05:01:42,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 63 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=286, Invalid=2684, Unknown=0, NotChecked=0, Total=2970 [2021-11-19 05:01:42,838 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 162 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 1077 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 281 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:42,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 246 Invalid, 1077 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 778 Invalid, 0 Unknown, 281 Unchecked, 0.6s Time] [2021-11-19 05:01:42,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-11-19 05:01:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2021-11-19 05:01:42,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 84 states have (on average 1.130952380952381) internal successors, (95), 85 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:42,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 100 transitions. [2021-11-19 05:01:42,844 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 100 transitions. Word has length 41 [2021-11-19 05:01:42,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:42,845 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 100 transitions. [2021-11-19 05:01:42,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:42,845 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 100 transitions. [2021-11-19 05:01:42,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 05:01:42,846 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:42,846 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:42,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 05:01:43,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-19 05:01:43,067 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:43,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:43,068 INFO L85 PathProgramCache]: Analyzing trace with hash -1906876194, now seen corresponding path program 2 times [2021-11-19 05:01:43,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:43,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115647635] [2021-11-19 05:01:43,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:43,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:43,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:43,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:43,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:43,492 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:43,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:43,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115647635] [2021-11-19 05:01:43,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115647635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:43,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461340303] [2021-11-19 05:01:43,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:01:43,493 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:43,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:43,495 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:43,503 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 05:01:43,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:01:43,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:01:43,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-19 05:01:43,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:43,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:01:43,945 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 21 treesize of output 17 [2021-11-19 05:01:44,012 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-19 05:01:44,012 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 35 treesize of output 34 [2021-11-19 05:01:45,152 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-19 05:01:45,152 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 49 treesize of output 34 [2021-11-19 05:01:45,207 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:45,207 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:47,671 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 62 treesize of output 56 [2021-11-19 05:01:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:48,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461340303] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:01:48,163 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:01:48,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 33 [2021-11-19 05:01:48,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878464167] [2021-11-19 05:01:48,163 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:48,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-19 05:01:48,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:48,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-19 05:01:48,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=945, Unknown=1, NotChecked=0, Total=1056 [2021-11-19 05:01:48,166 INFO L87 Difference]: Start difference. First operand 91 states and 100 transitions. Second operand has 33 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 29 states have internal predecessors, (107), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:49,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:49,191 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2021-11-19 05:01:49,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-19 05:01:49,192 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 29 states have internal predecessors, (107), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-11-19 05:01:49,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:49,193 INFO L225 Difference]: With dead ends: 155 [2021-11-19 05:01:49,193 INFO L226 Difference]: Without dead ends: 136 [2021-11-19 05:01:49,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=201, Invalid=1438, Unknown=1, NotChecked=0, Total=1640 [2021-11-19 05:01:49,196 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 107 mSDsluCounter, 245 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 117 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:49,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 287 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 522 Invalid, 0 Unknown, 117 Unchecked, 0.4s Time] [2021-11-19 05:01:49,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-19 05:01:49,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2021-11-19 05:01:49,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 124 states have (on average 1.1129032258064515) internal successors, (138), 125 states have internal predecessors, (138), 5 states have call successors, (5), 5 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:49,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 144 transitions. [2021-11-19 05:01:49,201 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 144 transitions. Word has length 51 [2021-11-19 05:01:49,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:49,202 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 144 transitions. [2021-11-19 05:01:49,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 3.4516129032258065) internal successors, (107), 29 states have internal predecessors, (107), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:49,202 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 144 transitions. [2021-11-19 05:01:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-19 05:01:49,203 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:49,203 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:49,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-19 05:01:49,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:49,404 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash 1943965187, now seen corresponding path program 3 times [2021-11-19 05:01:49,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:49,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265857542] [2021-11-19 05:01:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:49,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:49,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:49,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:49,867 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:01:49,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:49,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265857542] [2021-11-19 05:01:49,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265857542] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:49,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691054879] [2021-11-19 05:01:49,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:01:49,869 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:49,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:49,887 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:49,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-19 05:01:50,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 05:01:50,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:01:50,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-19 05:01:50,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:50,254 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 [2021-11-19 05:01:50,814 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:50,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:51,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:01:51,061 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 26 treesize of output 22 [2021-11-19 05:01:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:51,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691054879] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:01:51,294 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:01:51,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 15, 15] total 37 [2021-11-19 05:01:51,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452156236] [2021-11-19 05:01:51,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:51,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 05:01:51,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:51,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 05:01:51,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1210, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:01:51,298 INFO L87 Difference]: Start difference. First operand 132 states and 144 transitions. Second operand has 37 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:53,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:01:53,238 INFO L93 Difference]: Finished difference Result 223 states and 239 transitions. [2021-11-19 05:01:53,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:01:53,239 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-11-19 05:01:53,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:01:53,241 INFO L225 Difference]: With dead ends: 223 [2021-11-19 05:01:53,242 INFO L226 Difference]: Without dead ends: 197 [2021-11-19 05:01:53,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1153 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=463, Invalid=3827, Unknown=0, NotChecked=0, Total=4290 [2021-11-19 05:01:53,246 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 286 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 922 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 1207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 922 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 233 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:01:53,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 148 Invalid, 1207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 922 Invalid, 0 Unknown, 233 Unchecked, 0.7s Time] [2021-11-19 05:01:53,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2021-11-19 05:01:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 154. [2021-11-19 05:01:53,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 145 states have (on average 1.110344827586207) internal successors, (161), 146 states have internal predecessors, (161), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:53,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 168 transitions. [2021-11-19 05:01:53,261 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 168 transitions. Word has length 51 [2021-11-19 05:01:53,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:01:53,262 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 168 transitions. [2021-11-19 05:01:53,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:01:53,263 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 168 transitions. [2021-11-19 05:01:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 05:01:53,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:01:53,264 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:01:53,310 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-19 05:01:53,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:53,487 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:01:53,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:01:53,488 INFO L85 PathProgramCache]: Analyzing trace with hash -2001819386, now seen corresponding path program 4 times [2021-11-19 05:01:53,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:01:53,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492269392] [2021-11-19 05:01:53,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:01:53,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:01:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:53,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:01:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:01:53,773 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:53,773 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:01:53,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492269392] [2021-11-19 05:01:53,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492269392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:01:53,773 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766599645] [2021-11-19 05:01:53,773 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:01:53,774 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:01:53,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:01:53,779 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:01:53,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-19 05:01:53,909 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:01:53,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:01:53,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-19 05:01:53,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:01:53,968 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:01:53,968 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:01:54,266 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 [2021-11-19 05:01:54,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:01:54,720 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 19 treesize of output 19 [2021-11-19 05:01:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:54,988 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:01:55,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 05:01:55,851 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 39 treesize of output 35 [2021-11-19 05:01:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:01:56,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766599645] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:01:56,801 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:01:56,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 43 [2021-11-19 05:01:56,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489250274] [2021-11-19 05:01:56,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:01:56,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 05:01:56,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:01:56,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 05:01:56,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=1698, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 05:01:56,804 INFO L87 Difference]: Start difference. First operand 154 states and 168 transitions. Second operand has 44 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:00,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:00,127 INFO L93 Difference]: Finished difference Result 376 states and 405 transitions. [2021-11-19 05:02:00,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 05:02:00,129 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-11-19 05:02:00,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:00,132 INFO L225 Difference]: With dead ends: 376 [2021-11-19 05:02:00,132 INFO L226 Difference]: Without dead ends: 376 [2021-11-19 05:02:00,137 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1376 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=770, Invalid=5872, Unknown=0, NotChecked=0, Total=6642 [2021-11-19 05:02:00,140 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 672 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2110 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 2509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 294 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:00,140 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [672 Valid, 169 Invalid, 2509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2110 Invalid, 0 Unknown, 294 Unchecked, 1.4s Time] [2021-11-19 05:02:00,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2021-11-19 05:02:00,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 226. [2021-11-19 05:02:00,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 217 states have (on average 1.1152073732718895) internal successors, (242), 218 states have internal predecessors, (242), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:00,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 249 transitions. [2021-11-19 05:02:00,169 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 249 transitions. Word has length 55 [2021-11-19 05:02:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:00,170 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 249 transitions. [2021-11-19 05:02:00,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 40 states have (on average 3.35) internal successors, (134), 40 states have internal predecessors, (134), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 249 transitions. [2021-11-19 05:02:00,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-19 05:02:00,171 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:00,171 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:00,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-19 05:02:00,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-19 05:02:00,387 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:02:00,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:00,387 INFO L85 PathProgramCache]: Analyzing trace with hash -1800116063, now seen corresponding path program 3 times [2021-11-19 05:02:00,387 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:00,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116558802] [2021-11-19 05:02:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:00,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:00,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:02:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:00,559 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:00,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:00,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116558802] [2021-11-19 05:02:00,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116558802] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:02:00,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652611155] [2021-11-19 05:02:00,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:02:00,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:00,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:02:00,584 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:02:00,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-19 05:02:00,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-19 05:02:00,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:02:00,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-19 05:02:00,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:02:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:01,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:02:01,367 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 7 treesize of output 5 [2021-11-19 05:02:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 1 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:01,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652611155] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:02:01,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:02:01,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 25 [2021-11-19 05:02:01,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370983813] [2021-11-19 05:02:01,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:02:01,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-19 05:02:01,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:01,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-19 05:02:01,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=563, Unknown=0, NotChecked=0, Total=650 [2021-11-19 05:02:01,449 INFO L87 Difference]: Start difference. First operand 226 states and 249 transitions. Second operand has 26 states, 25 states have (on average 5.12) internal successors, (128), 22 states have internal predecessors, (128), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:02,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:02,123 INFO L93 Difference]: Finished difference Result 344 states and 381 transitions. [2021-11-19 05:02:02,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-19 05:02:02,125 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 5.12) internal successors, (128), 22 states have internal predecessors, (128), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2021-11-19 05:02:02,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:02,127 INFO L225 Difference]: With dead ends: 344 [2021-11-19 05:02:02,127 INFO L226 Difference]: Without dead ends: 344 [2021-11-19 05:02:02,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 05:02:02,128 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 372 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:02,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 114 Invalid, 833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:02:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2021-11-19 05:02:02,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 284. [2021-11-19 05:02:02,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 275 states have (on average 1.1236363636363635) internal successors, (309), 276 states have internal predecessors, (309), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:02,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 316 transitions. [2021-11-19 05:02:02,141 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 316 transitions. Word has length 55 [2021-11-19 05:02:02,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:02,142 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 316 transitions. [2021-11-19 05:02:02,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 5.12) internal successors, (128), 22 states have internal predecessors, (128), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:02,142 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 316 transitions. [2021-11-19 05:02:02,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-19 05:02:02,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:02,144 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 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] [2021-11-19 05:02:02,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-19 05:02:02,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:02,367 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:02:02,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:02,368 INFO L85 PathProgramCache]: Analyzing trace with hash 107204201, now seen corresponding path program 1 times [2021-11-19 05:02:02,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:02,368 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823706296] [2021-11-19 05:02:02,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:02,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:02,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:02:02,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:02,720 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:02:02,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:02,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823706296] [2021-11-19 05:02:02,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823706296] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:02:02,721 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882145140] [2021-11-19 05:02:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:02,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:02,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:02:02,723 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:02:02,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-19 05:02:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:02,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 05:02:02,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:02:02,989 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 21 treesize of output 17 [2021-11-19 05:02:03,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-11-19 05:02:03,975 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:02:03,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:02:04,487 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 22 treesize of output 20 [2021-11-19 05:02:04,490 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 32 treesize of output 28 [2021-11-19 05:02:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:02:04,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882145140] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:02:04,791 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:02:04,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 36 [2021-11-19 05:02:04,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358863477] [2021-11-19 05:02:04,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:02:04,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-19 05:02:04,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:04,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-19 05:02:04,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1127, Unknown=0, NotChecked=0, Total=1260 [2021-11-19 05:02:04,793 INFO L87 Difference]: Start difference. First operand 284 states and 316 transitions. Second operand has 36 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:05,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:05,389 INFO L93 Difference]: Finished difference Result 277 states and 302 transitions. [2021-11-19 05:02:05,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-19 05:02:05,395 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-11-19 05:02:05,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:05,397 INFO L225 Difference]: With dead ends: 277 [2021-11-19 05:02:05,397 INFO L226 Difference]: Without dead ends: 271 [2021-11-19 05:02:05,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=271, Invalid=2081, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 05:02:05,399 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 164 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 516 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 657 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:05,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 114 Invalid, 657 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 516 Invalid, 0 Unknown, 124 Unchecked, 0.3s Time] [2021-11-19 05:02:05,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2021-11-19 05:02:05,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 270. [2021-11-19 05:02:05,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 261 states have (on average 1.10727969348659) internal successors, (289), 262 states have internal predecessors, (289), 6 states have call successors, (6), 6 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:05,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 296 transitions. [2021-11-19 05:02:05,409 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 296 transitions. Word has length 58 [2021-11-19 05:02:05,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:05,410 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 296 transitions. [2021-11-19 05:02:05,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 33 states have (on average 3.5454545454545454) internal successors, (117), 32 states have internal predecessors, (117), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:05,410 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 296 transitions. [2021-11-19 05:02:05,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-19 05:02:05,412 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:05,412 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:05,442 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-19 05:02:05,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-19 05:02:05,631 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:02:05,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:05,632 INFO L85 PathProgramCache]: Analyzing trace with hash -191538322, now seen corresponding path program 5 times [2021-11-19 05:02:05,632 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:05,632 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105851424] [2021-11-19 05:02:05,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:05,632 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:05,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:05,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:02:05,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:05,892 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 46 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:05,893 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:05,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105851424] [2021-11-19 05:02:05,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105851424] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:02:05,893 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823634985] [2021-11-19 05:02:05,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:02:05,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:05,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:02:05,895 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:02:05,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-19 05:02:06,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-19 05:02:06,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:02:06,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-19 05:02:06,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:02:06,041 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:02:06,042 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:02:06,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 65 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:06,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:02:06,868 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 52 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:06,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823634985] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:02:06,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:02:06,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 37 [2021-11-19 05:02:06,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640982730] [2021-11-19 05:02:06,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:02:06,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-19 05:02:06,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:06,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-19 05:02:06,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1125, Unknown=0, NotChecked=0, Total=1332 [2021-11-19 05:02:06,872 INFO L87 Difference]: Start difference. First operand 270 states and 296 transitions. Second operand has 37 states, 36 states have (on average 3.861111111111111) internal successors, (139), 34 states have internal predecessors, (139), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:07,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:07,710 INFO L93 Difference]: Finished difference Result 464 states and 500 transitions. [2021-11-19 05:02:07,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-19 05:02:07,727 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.861111111111111) internal successors, (139), 34 states have internal predecessors, (139), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2021-11-19 05:02:07,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:07,738 INFO L225 Difference]: With dead ends: 464 [2021-11-19 05:02:07,738 INFO L226 Difference]: Without dead ends: 428 [2021-11-19 05:02:07,740 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 115 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 838 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=455, Invalid=2301, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 05:02:07,742 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 280 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 1034 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1034 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:07,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 119 Invalid, 1072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1034 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 05:02:07,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2021-11-19 05:02:07,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 364. [2021-11-19 05:02:07,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 354 states have (on average 1.1073446327683616) internal successors, (392), 355 states have internal predecessors, (392), 7 states have call successors, (7), 7 states have call predecessors, (7), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:07,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 400 transitions. [2021-11-19 05:02:07,761 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 400 transitions. Word has length 67 [2021-11-19 05:02:07,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:07,764 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 400 transitions. [2021-11-19 05:02:07,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.861111111111111) internal successors, (139), 34 states have internal predecessors, (139), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:07,765 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 400 transitions. [2021-11-19 05:02:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-19 05:02:07,774 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:07,774 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:07,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-19 05:02:07,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:07,987 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:02:07,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:07,988 INFO L85 PathProgramCache]: Analyzing trace with hash -1213534789, now seen corresponding path program 4 times [2021-11-19 05:02:07,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:07,988 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899455137] [2021-11-19 05:02:07,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:07,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:08,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:08,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:02:08,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:08,783 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 5 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 05:02:08,783 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:08,783 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899455137] [2021-11-19 05:02:08,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899455137] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:02:08,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405240176] [2021-11-19 05:02:08,786 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:02:08,786 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:08,787 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:02:08,787 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:02:08,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-19 05:02:08,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:02:08,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:02:08,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-19 05:02:08,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:02:08,930 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:02:08,930 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:02:08,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:02:09,453 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 15 treesize of output 11 [2021-11-19 05:02:09,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-19 05:02:10,983 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 0 case distinctions, treesize of input 35 treesize of output 27 [2021-11-19 05:02:12,157 INFO L354 Elim1Store]: treesize reduction 113, result has 6.6 percent of original size [2021-11-19 05:02:12,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 47 [2021-11-19 05:02:12,215 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:12,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:02:14,286 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-19 05:02:14,286 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 397 treesize of output 324 [2021-11-19 05:02:14,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:02:14,309 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 312 treesize of output 296 [2021-11-19 05:02:14,524 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 61 treesize of output 57 [2021-11-19 05:02:14,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:02:14,640 INFO L354 Elim1Store]: treesize reduction 3, result has 92.3 percent of original size [2021-11-19 05:02:14,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 95 treesize of output 107 [2021-11-19 05:02:19,374 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:19,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405240176] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:02:19,375 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:02:19,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24, 24] total 67 [2021-11-19 05:02:19,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561071200] [2021-11-19 05:02:19,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:02:19,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-19 05:02:19,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:19,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-19 05:02:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=4147, Unknown=0, NotChecked=0, Total=4422 [2021-11-19 05:02:19,377 INFO L87 Difference]: Start difference. First operand 364 states and 400 transitions. Second operand has 67 states, 64 states have (on average 2.625) internal successors, (168), 63 states have internal predecessors, (168), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:23,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:23,828 INFO L93 Difference]: Finished difference Result 597 states and 654 transitions. [2021-11-19 05:02:23,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 05:02:23,828 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 64 states have (on average 2.625) internal successors, (168), 63 states have internal predecessors, (168), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-11-19 05:02:23,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:23,832 INFO L225 Difference]: With dead ends: 597 [2021-11-19 05:02:23,832 INFO L226 Difference]: Without dead ends: 555 [2021-11-19 05:02:23,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2460 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=992, Invalid=10998, Unknown=0, NotChecked=0, Total=11990 [2021-11-19 05:02:23,837 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 508 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 1364 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 508 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1364 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 881 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:23,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [508 Valid, 196 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1364 Invalid, 0 Unknown, 881 Unchecked, 0.9s Time] [2021-11-19 05:02:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555 states. [2021-11-19 05:02:23,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555 to 454. [2021-11-19 05:02:23,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 441 states have (on average 1.1020408163265305) internal successors, (486), 442 states have internal predecessors, (486), 10 states have call successors, (10), 10 states have call predecessors, (10), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:23,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 497 transitions. [2021-11-19 05:02:23,854 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 497 transitions. Word has length 68 [2021-11-19 05:02:23,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:23,855 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 497 transitions. [2021-11-19 05:02:23,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 64 states have (on average 2.625) internal successors, (168), 63 states have internal predecessors, (168), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:23,855 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 497 transitions. [2021-11-19 05:02:23,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-19 05:02:23,857 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:23,858 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:23,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-19 05:02:24,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:24,071 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:02:24,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:24,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1171066993, now seen corresponding path program 6 times [2021-11-19 05:02:24,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:24,072 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034303109] [2021-11-19 05:02:24,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:24,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:24,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:24,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:02:24,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:24,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:24,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034303109] [2021-11-19 05:02:24,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034303109] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:02:24,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968140332] [2021-11-19 05:02:24,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:02:24,447 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:24,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:02:24,449 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:02:24,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-19 05:02:24,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-19 05:02:24,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:02:24,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 05:02:24,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:02:24,957 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 [2021-11-19 05:02:25,377 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 [2021-11-19 05:02:25,392 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:25,393 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:02:25,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:02:25,620 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 26 treesize of output 22 [2021-11-19 05:02:25,833 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 17 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:25,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968140332] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:02:25,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:02:25,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19, 19] total 38 [2021-11-19 05:02:25,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861028950] [2021-11-19 05:02:25,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:02:25,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 05:02:25,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:25,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 05:02:25,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 05:02:25,847 INFO L87 Difference]: Start difference. First operand 454 states and 497 transitions. Second operand has 38 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:27,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:27,451 INFO L93 Difference]: Finished difference Result 767 states and 833 transitions. [2021-11-19 05:02:27,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-19 05:02:27,456 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2021-11-19 05:02:27,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:27,460 INFO L225 Difference]: With dead ends: 767 [2021-11-19 05:02:27,461 INFO L226 Difference]: Without dead ends: 723 [2021-11-19 05:02:27,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=325, Invalid=3215, Unknown=0, NotChecked=0, Total=3540 [2021-11-19 05:02:27,463 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 233 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 1997 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 2422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 397 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:27,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 260 Invalid, 2422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1997 Invalid, 0 Unknown, 397 Unchecked, 1.0s Time] [2021-11-19 05:02:27,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-11-19 05:02:27,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 591. [2021-11-19 05:02:27,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 576 states have (on average 1.1006944444444444) internal successors, (634), 577 states have internal predecessors, (634), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:27,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 647 transitions. [2021-11-19 05:02:27,489 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 647 transitions. Word has length 71 [2021-11-19 05:02:27,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:27,489 INFO L470 AbstractCegarLoop]: Abstraction has 591 states and 647 transitions. [2021-11-19 05:02:27,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 35 states have (on average 3.4857142857142858) internal successors, (122), 34 states have internal predecessors, (122), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:27,490 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 647 transitions. [2021-11-19 05:02:27,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-19 05:02:27,492 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:27,493 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:27,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-19 05:02:27,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-19 05:02:27,707 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:02:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1329333336, now seen corresponding path program 5 times [2021-11-19 05:02:27,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:27,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297515798] [2021-11-19 05:02:27,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:27,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:27,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:02:27,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:27,925 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 1 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:27,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:27,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297515798] [2021-11-19 05:02:27,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297515798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:02:27,925 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257676868] [2021-11-19 05:02:27,925 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:02:27,926 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:27,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:02:27,931 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:02:27,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-19 05:02:28,078 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-19 05:02:28,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:02:28,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-19 05:02:28,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:02:28,147 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:02:28,147 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 05:02:28,151 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 15 treesize of output 13 [2021-11-19 05:02:28,819 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 6 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:28,819 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:02:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 15 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:29,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257676868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:02:29,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:02:29,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 31 [2021-11-19 05:02:29,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80971927] [2021-11-19 05:02:29,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:02:29,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-19 05:02:29,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:29,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-19 05:02:29,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-11-19 05:02:29,576 INFO L87 Difference]: Start difference. First operand 591 states and 647 transitions. Second operand has 32 states, 31 states have (on average 6.0) internal successors, (186), 28 states have internal predecessors, (186), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:30,849 INFO L93 Difference]: Finished difference Result 1044 states and 1149 transitions. [2021-11-19 05:02:30,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-19 05:02:30,850 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 6.0) internal successors, (186), 28 states have internal predecessors, (186), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-11-19 05:02:30,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:30,857 INFO L225 Difference]: With dead ends: 1044 [2021-11-19 05:02:30,857 INFO L226 Difference]: Without dead ends: 1044 [2021-11-19 05:02:30,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 125 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=1651, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 05:02:30,859 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 313 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 1963 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:30,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 179 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1963 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 05:02:30,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-11-19 05:02:30,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 704. [2021-11-19 05:02:30,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 689 states have (on average 1.1015965166908563) internal successors, (759), 690 states have internal predecessors, (759), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:30,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 772 transitions. [2021-11-19 05:02:30,893 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 772 transitions. Word has length 72 [2021-11-19 05:02:30,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:30,894 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 772 transitions. [2021-11-19 05:02:30,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 6.0) internal successors, (186), 28 states have internal predecessors, (186), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:30,894 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 772 transitions. [2021-11-19 05:02:30,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-19 05:02:30,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:30,897 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:02:30,936 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-19 05:02:31,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-19 05:02:31,119 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:02:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:31,119 INFO L85 PathProgramCache]: Analyzing trace with hash 441224180, now seen corresponding path program 7 times [2021-11-19 05:02:31,119 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:31,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42373876] [2021-11-19 05:02:31,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:31,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:31,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:31,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:02:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:31,487 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:31,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42373876] [2021-11-19 05:02:31,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42373876] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:02:31,487 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509354390] [2021-11-19 05:02:31,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:02:31,488 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:31,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:02:31,489 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:02:31,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-19 05:02:31,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:31,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 05:02:31,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:02:32,164 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:32,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:02:32,708 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 5 treesize of output 3 [2021-11-19 05:02:32,806 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:02:32,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509354390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:02:32,807 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:02:32,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2021-11-19 05:02:32,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187026756] [2021-11-19 05:02:32,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:02:32,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-19 05:02:32,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:32,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-19 05:02:32,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=1398, Unknown=0, NotChecked=0, Total=1560 [2021-11-19 05:02:32,809 INFO L87 Difference]: Start difference. First operand 704 states and 772 transitions. Second operand has 40 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:34,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:34,441 INFO L93 Difference]: Finished difference Result 999 states and 1092 transitions. [2021-11-19 05:02:34,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-19 05:02:34,451 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2021-11-19 05:02:34,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:34,457 INFO L225 Difference]: With dead ends: 999 [2021-11-19 05:02:34,457 INFO L226 Difference]: Without dead ends: 999 [2021-11-19 05:02:34,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=387, Invalid=2805, Unknown=0, NotChecked=0, Total=3192 [2021-11-19 05:02:34,459 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 519 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 2336 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 2382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:34,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 178 Invalid, 2382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2336 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 05:02:34,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-11-19 05:02:34,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 852. [2021-11-19 05:02:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 852 states, 837 states have (on average 1.1111111111111112) internal successors, (930), 838 states have internal predecessors, (930), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:34,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 852 states to 852 states and 943 transitions. [2021-11-19 05:02:34,487 INFO L78 Accepts]: Start accepts. Automaton has 852 states and 943 transitions. Word has length 75 [2021-11-19 05:02:34,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:34,488 INFO L470 AbstractCegarLoop]: Abstraction has 852 states and 943 transitions. [2021-11-19 05:02:34,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 4.166666666666667) internal successors, (150), 36 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:34,489 INFO L276 IsEmpty]: Start isEmpty. Operand 852 states and 943 transitions. [2021-11-19 05:02:34,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 05:02:34,491 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:34,492 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 05:02:34,531 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-19 05:02:34,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:34,716 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:02:34,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:34,716 INFO L85 PathProgramCache]: Analyzing trace with hash -449434420, now seen corresponding path program 1 times [2021-11-19 05:02:34,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:34,717 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441948648] [2021-11-19 05:02:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:34,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:34,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:35,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:02:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:35,288 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:02:35,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:35,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441948648] [2021-11-19 05:02:35,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441948648] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:02:35,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256377570] [2021-11-19 05:02:35,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:35,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:35,291 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:02:35,291 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:02:35,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-19 05:02:35,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:35,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-19 05:02:35,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:02:35,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:02:35,871 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 21 treesize of output 17 [2021-11-19 05:02:35,962 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 31 treesize of output 30 [2021-11-19 05:02:38,509 INFO L354 Elim1Store]: treesize reduction 89, result has 8.2 percent of original size [2021-11-19 05:02:38,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 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 37 [2021-11-19 05:02:38,556 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 55 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:02:38,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:02:39,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:02:39,313 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 130 treesize of output 124 [2021-11-19 05:02:39,367 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 69 treesize of output 65 [2021-11-19 05:02:39,414 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:02:39,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:02:39,426 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 171 treesize of output 161 [2021-11-19 05:02:40,580 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:02:40,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256377570] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:02:40,580 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:02:40,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 22] total 58 [2021-11-19 05:02:40,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795200598] [2021-11-19 05:02:40,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:02:40,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-19 05:02:40,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:40,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-19 05:02:40,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=3066, Unknown=0, NotChecked=0, Total=3306 [2021-11-19 05:02:40,582 INFO L87 Difference]: Start difference. First operand 852 states and 943 transitions. Second operand has 58 states, 57 states have (on average 2.736842105263158) internal successors, (156), 54 states have internal predecessors, (156), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:02:41,662 INFO L93 Difference]: Finished difference Result 972 states and 1072 transitions. [2021-11-19 05:02:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 05:02:41,663 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 2.736842105263158) internal successors, (156), 54 states have internal predecessors, (156), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-11-19 05:02:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:02:41,668 INFO L225 Difference]: With dead ends: 972 [2021-11-19 05:02:41,668 INFO L226 Difference]: Without dead ends: 966 [2021-11-19 05:02:41,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=350, Invalid=4762, Unknown=0, NotChecked=0, Total=5112 [2021-11-19 05:02:41,670 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 125 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 1202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:02:41,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 269 Invalid, 1202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 908 Invalid, 0 Unknown, 283 Unchecked, 0.6s Time] [2021-11-19 05:02:41,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-11-19 05:02:41,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 958. [2021-11-19 05:02:41,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 943 states have (on average 1.1092258748674444) internal successors, (1046), 944 states have internal predecessors, (1046), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:41,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 1059 transitions. [2021-11-19 05:02:41,698 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 1059 transitions. Word has length 78 [2021-11-19 05:02:41,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:02:41,699 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 1059 transitions. [2021-11-19 05:02:41,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 2.736842105263158) internal successors, (156), 54 states have internal predecessors, (156), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:02:41,699 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 1059 transitions. [2021-11-19 05:02:41,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-19 05:02:41,702 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:02:41,703 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 05:02:41,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-19 05:02:41,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:41,921 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:02:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:02:41,922 INFO L85 PathProgramCache]: Analyzing trace with hash -1415298332, now seen corresponding path program 2 times [2021-11-19 05:02:41,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:02:41,922 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636507531] [2021-11-19 05:02:41,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:02:41,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:02:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:42,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:02:42,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:02:42,438 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:02:42,438 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:02:42,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636507531] [2021-11-19 05:02:42,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636507531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:02:42,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561446527] [2021-11-19 05:02:42,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:02:42,439 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:02:42,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:02:42,439 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:02:42,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-19 05:02:42,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:02:42,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:02:42,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-19 05:02:42,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:02:42,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:02:42,592 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 9 treesize of output 11 [2021-11-19 05:02:43,032 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 15 treesize of output 11 [2021-11-19 05:02:43,089 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 28 treesize of output 27 [2021-11-19 05:02:44,626 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 0 case distinctions, treesize of input 36 treesize of output 28 [2021-11-19 05:02:45,775 INFO L354 Elim1Store]: treesize reduction 113, result has 6.6 percent of original size [2021-11-19 05:02:45,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 72 treesize of output 47 [2021-11-19 05:02:45,827 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 26 proven. 34 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:02:45,827 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:02:49,290 INFO L354 Elim1Store]: treesize reduction 54, result has 34.1 percent of original size [2021-11-19 05:02:49,291 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 4 case distinctions, treesize of input 389 treesize of output 316 [2021-11-19 05:02:49,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:02:49,307 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 304 treesize of output 288 [2021-11-19 05:02:49,477 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 194 treesize of output 184 [2021-11-19 05:02:49,542 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:02:49,572 INFO L354 Elim1Store]: treesize reduction 3, result has 92.3 percent of original size [2021-11-19 05:02:49,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 92 treesize of output 104 [2021-11-19 05:02:54,900 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 18 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:02:54,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561446527] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:02:54,900 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:02:54,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24, 24] total 61 [2021-11-19 05:02:54,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287656490] [2021-11-19 05:02:54,901 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:02:54,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-19 05:02:54,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:02:54,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-19 05:02:54,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=3402, Unknown=1, NotChecked=0, Total=3660 [2021-11-19 05:02:54,916 INFO L87 Difference]: Start difference. First operand 958 states and 1059 transitions. Second operand has 61 states, 59 states have (on average 2.983050847457627) internal successors, (176), 57 states have internal predecessors, (176), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:00,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:00,705 INFO L93 Difference]: Finished difference Result 1415 states and 1568 transitions. [2021-11-19 05:03:00,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-19 05:03:00,711 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 2.983050847457627) internal successors, (176), 57 states have internal predecessors, (176), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-11-19 05:03:00,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:00,720 INFO L225 Difference]: With dead ends: 1415 [2021-11-19 05:03:00,720 INFO L226 Difference]: Without dead ends: 1391 [2021-11-19 05:03:00,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 128 SyntacticMatches, 7 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=1221, Invalid=11888, Unknown=1, NotChecked=0, Total=13110 [2021-11-19 05:03:00,723 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 371 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 1875 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 1875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 809 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:00,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [371 Valid, 228 Invalid, 2739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 1875 Invalid, 0 Unknown, 809 Unchecked, 1.3s Time] [2021-11-19 05:03:00,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-11-19 05:03:00,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1174. [2021-11-19 05:03:00,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1174 states, 1159 states have (on average 1.1173425366695426) internal successors, (1295), 1160 states have internal predecessors, (1295), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1174 states to 1174 states and 1308 transitions. [2021-11-19 05:03:00,761 INFO L78 Accepts]: Start accepts. Automaton has 1174 states and 1308 transitions. Word has length 78 [2021-11-19 05:03:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:00,762 INFO L470 AbstractCegarLoop]: Abstraction has 1174 states and 1308 transitions. [2021-11-19 05:03:00,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 2.983050847457627) internal successors, (176), 57 states have internal predecessors, (176), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:00,763 INFO L276 IsEmpty]: Start isEmpty. Operand 1174 states and 1308 transitions. [2021-11-19 05:03:00,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-11-19 05:03:00,766 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:00,766 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:00,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:00,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-11-19 05:03:00,979 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:03:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1811031592, now seen corresponding path program 8 times [2021-11-19 05:03:00,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:00,980 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149837326] [2021-11-19 05:03:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:00,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:01,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:01,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:03:01,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 21 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:01,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:01,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149837326] [2021-11-19 05:03:01,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149837326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:03:01,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720452471] [2021-11-19 05:03:01,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:03:01,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:01,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:03:01,318 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:03:01,319 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-19 05:03:01,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:03:01,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:03:01,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-19 05:03:01,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:01,449 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:03:01,449 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:03:01,811 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 [2021-11-19 05:03:02,916 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:03:02,916 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 28 treesize of output 28 [2021-11-19 05:03:03,195 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 28 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:03,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:04,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 05:03:04,420 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 39 treesize of output 35 [2021-11-19 05:03:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 45 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:05,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720452471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:03:05,768 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:03:05,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 65 [2021-11-19 05:03:05,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230496090] [2021-11-19 05:03:05,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:03:05,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-19 05:03:05,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:05,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-19 05:03:05,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=3880, Unknown=0, NotChecked=0, Total=4160 [2021-11-19 05:03:05,771 INFO L87 Difference]: Start difference. First operand 1174 states and 1308 transitions. Second operand has 65 states, 62 states have (on average 3.5806451612903225) internal successors, (222), 61 states have internal predecessors, (222), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:09,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:09,813 INFO L93 Difference]: Finished difference Result 1471 states and 1619 transitions. [2021-11-19 05:03:09,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-19 05:03:09,814 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 62 states have (on average 3.5806451612903225) internal successors, (222), 61 states have internal predecessors, (222), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2021-11-19 05:03:09,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:09,821 INFO L225 Difference]: With dead ends: 1471 [2021-11-19 05:03:09,821 INFO L226 Difference]: Without dead ends: 1424 [2021-11-19 05:03:09,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=858, Invalid=10914, Unknown=0, NotChecked=0, Total=11772 [2021-11-19 05:03:09,824 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 553 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 2614 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 553 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 4874 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2211 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:09,825 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [553 Valid, 285 Invalid, 4874 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2614 Invalid, 0 Unknown, 2211 Unchecked, 1.5s Time] [2021-11-19 05:03:09,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1424 states. [2021-11-19 05:03:09,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1424 to 1280. [2021-11-19 05:03:09,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1280 states, 1263 states have (on average 1.1171813143309581) internal successors, (1411), 1264 states have internal predecessors, (1411), 14 states have call successors, (14), 14 states have call predecessors, (14), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:09,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1280 states to 1280 states and 1426 transitions. [2021-11-19 05:03:09,864 INFO L78 Accepts]: Start accepts. Automaton has 1280 states and 1426 transitions. Word has length 81 [2021-11-19 05:03:09,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:09,865 INFO L470 AbstractCegarLoop]: Abstraction has 1280 states and 1426 transitions. [2021-11-19 05:03:09,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 62 states have (on average 3.5806451612903225) internal successors, (222), 61 states have internal predecessors, (222), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:09,866 INFO L276 IsEmpty]: Start isEmpty. Operand 1280 states and 1426 transitions. [2021-11-19 05:03:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-19 05:03:09,869 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:09,869 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 05:03:09,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:10,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-19 05:03:10,095 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:03:10,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:10,095 INFO L85 PathProgramCache]: Analyzing trace with hash -330717544, now seen corresponding path program 3 times [2021-11-19 05:03:10,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:10,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69899832] [2021-11-19 05:03:10,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:10,096 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:10,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:10,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:03:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:10,409 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 49 proven. 29 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:03:10,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:10,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69899832] [2021-11-19 05:03:10,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69899832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:03:10,410 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116408526] [2021-11-19 05:03:10,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:03:10,410 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:10,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:03:10,411 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:03:10,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-19 05:03:10,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-19 05:03:10,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:03:10,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-19 05:03:10,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:10,591 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:03:10,973 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 21 treesize of output 17 [2021-11-19 05:03:11,022 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 31 treesize of output 30 [2021-11-19 05:03:13,146 INFO L354 Elim1Store]: treesize reduction 57, result has 12.3 percent of original size [2021-11-19 05:03:13,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 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 51 treesize of output 34 [2021-11-19 05:03:13,182 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 5 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:13,183 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:14,907 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~length2~0 Int)) (let ((.cse1 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) c_main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse0 (select .cse1 (+ c_main_~nondetString2~0.offset 1)))) (or (= .cse0 0) (not (= .cse0 (select (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse1) c_main_~nondetString1~0.base) (+ 2 c_main_~nondetString1~0.offset)))))))) is different from false [2021-11-19 05:03:14,943 INFO L354 Elim1Store]: treesize reduction 29, result has 43.1 percent of original size [2021-11-19 05:03:14,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 209 treesize of output 169 [2021-11-19 05:03:14,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:03:14,963 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 165 treesize of output 159 [2021-11-19 05:03:14,987 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:03:14,988 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 0 case distinctions, treesize of input 28 treesize of output 19 [2021-11-19 05:03:15,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:03:15,046 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:03:15,046 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 80 treesize of output 84 [2021-11-19 05:03:15,691 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 8 proven. 82 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:03:15,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116408526] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:03:15,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:03:15,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 24, 23] total 57 [2021-11-19 05:03:15,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046208947] [2021-11-19 05:03:15,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:03:15,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-19 05:03:15,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:15,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-19 05:03:15,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=2886, Unknown=1, NotChecked=108, Total=3192 [2021-11-19 05:03:15,693 INFO L87 Difference]: Start difference. First operand 1280 states and 1426 transitions. Second operand has 57 states, 55 states have (on average 3.8) internal successors, (209), 53 states have internal predecessors, (209), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:18,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:18,570 INFO L93 Difference]: Finished difference Result 1159 states and 1278 transitions. [2021-11-19 05:03:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 05:03:18,572 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 55 states have (on average 3.8) internal successors, (209), 53 states have internal predecessors, (209), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-11-19 05:03:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:18,576 INFO L225 Difference]: With dead ends: 1159 [2021-11-19 05:03:18,576 INFO L226 Difference]: Without dead ends: 1027 [2021-11-19 05:03:18,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=328, Invalid=4645, Unknown=1, NotChecked=138, Total=5112 [2021-11-19 05:03:18,578 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 194 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 1260 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 1693 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 415 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:18,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 553 Invalid, 1693 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1260 Invalid, 0 Unknown, 415 Unchecked, 0.7s Time] [2021-11-19 05:03:18,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-11-19 05:03:18,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 954. [2021-11-19 05:03:18,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 939 states have (on average 1.1150159744408945) internal successors, (1047), 940 states have internal predecessors, (1047), 12 states have call successors, (12), 12 states have call predecessors, (12), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:18,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1060 transitions. [2021-11-19 05:03:18,603 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1060 transitions. Word has length 84 [2021-11-19 05:03:18,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:18,603 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1060 transitions. [2021-11-19 05:03:18,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 55 states have (on average 3.8) internal successors, (209), 53 states have internal predecessors, (209), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:18,604 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1060 transitions. [2021-11-19 05:03:18,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-11-19 05:03:18,624 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:18,624 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:18,661 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:18,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-19 05:03:18,839 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:03:18,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:18,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1327649636, now seen corresponding path program 6 times [2021-11-19 05:03:18,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:18,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478365971] [2021-11-19 05:03:18,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:18,840 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:18,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:19,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:03:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:19,418 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:19,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:19,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478365971] [2021-11-19 05:03:19,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478365971] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:03:19,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242382361] [2021-11-19 05:03:19,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:03:19,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:19,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:03:19,420 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:03:19,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-19 05:03:19,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-19 05:03:19,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:03:19,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-19 05:03:19,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:19,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:03:19,876 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 21 treesize of output 17 [2021-11-19 05:03:19,966 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-19 05:03:19,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-19 05:03:22,215 INFO L354 Elim1Store]: treesize reduction 57, result has 34.5 percent of original size [2021-11-19 05:03:22,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 56 [2021-11-19 05:03:22,263 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:22,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:29,458 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (cstrpbrk_~s~0.offset Int) (cstrpbrk_~s~0.base Int) (main_~length2~0 Int)) (let ((.cse1 (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)))) (let ((.cse0 (select (select .cse1 cstrpbrk_~s~0.base) cstrpbrk_~s~0.offset))) (or (= .cse0 0) (not (= .cse0 (select (select .cse1 c_main_~nondetString1~0.base) (+ 3 c_main_~nondetString1~0.offset)))))))) is different from false [2021-11-19 05:03:29,469 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-19 05:03:29,469 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 412 treesize of output 368 [2021-11-19 05:03:29,938 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 7 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:29,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242382361] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:03:29,938 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:03:29,938 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 61 [2021-11-19 05:03:29,938 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098386608] [2021-11-19 05:03:29,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:03:29,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-19 05:03:29,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:29,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-19 05:03:29,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=3357, Unknown=7, NotChecked=116, Total=3660 [2021-11-19 05:03:29,940 INFO L87 Difference]: Start difference. First operand 954 states and 1060 transitions. Second operand has 61 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 57 states have internal predecessors, (225), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:34,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:34,598 INFO L93 Difference]: Finished difference Result 1432 states and 1579 transitions. [2021-11-19 05:03:34,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:03:34,599 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 57 states have internal predecessors, (225), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2021-11-19 05:03:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:34,604 INFO L225 Difference]: With dead ends: 1432 [2021-11-19 05:03:34,604 INFO L226 Difference]: Without dead ends: 1369 [2021-11-19 05:03:34,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 137 SyntacticMatches, 3 SemanticMatches, 90 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=423, Invalid=7763, Unknown=8, NotChecked=178, Total=8372 [2021-11-19 05:03:34,605 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 156 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 1212 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 2281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1051 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:34,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 440 Invalid, 2281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1212 Invalid, 0 Unknown, 1051 Unchecked, 0.7s Time] [2021-11-19 05:03:34,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-11-19 05:03:34,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 1356. [2021-11-19 05:03:34,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1336 states have (on average 1.1130239520958083) internal successors, (1487), 1337 states have internal predecessors, (1487), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:34,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 1505 transitions. [2021-11-19 05:03:34,639 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 1505 transitions. Word has length 85 [2021-11-19 05:03:34,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:34,640 INFO L470 AbstractCegarLoop]: Abstraction has 1356 states and 1505 transitions. [2021-11-19 05:03:34,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 3.8135593220338984) internal successors, (225), 57 states have internal predecessors, (225), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:34,641 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 1505 transitions. [2021-11-19 05:03:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-19 05:03:34,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:34,656 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:34,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:34,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-19 05:03:34,871 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:03:34,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1030247833, now seen corresponding path program 7 times [2021-11-19 05:03:34,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:34,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701031249] [2021-11-19 05:03:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:34,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:35,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:03:35,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 6 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:35,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:35,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701031249] [2021-11-19 05:03:35,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701031249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:03:35,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534442343] [2021-11-19 05:03:35,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:03:35,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:35,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:03:35,101 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:03:35,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-19 05:03:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:35,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-19 05:03:35,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:35,253 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:03:35,253 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 05:03:35,256 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 15 treesize of output 13 [2021-11-19 05:03:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 15 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:35,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:36,682 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 28 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:36,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534442343] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:03:36,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:03:36,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 37 [2021-11-19 05:03:36,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846815586] [2021-11-19 05:03:36,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:03:36,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-19 05:03:36,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:36,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-19 05:03:36,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1257, Unknown=0, NotChecked=0, Total=1406 [2021-11-19 05:03:36,685 INFO L87 Difference]: Start difference. First operand 1356 states and 1505 transitions. Second operand has 38 states, 37 states have (on average 6.351351351351352) internal successors, (235), 34 states have internal predecessors, (235), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:38,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:38,221 INFO L93 Difference]: Finished difference Result 2138 states and 2385 transitions. [2021-11-19 05:03:38,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-19 05:03:38,222 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 6.351351351351352) internal successors, (235), 34 states have internal predecessors, (235), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2021-11-19 05:03:38,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:38,229 INFO L225 Difference]: With dead ends: 2138 [2021-11-19 05:03:38,230 INFO L226 Difference]: Without dead ends: 2138 [2021-11-19 05:03:38,230 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 155 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=332, Invalid=2424, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 05:03:38,230 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 402 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 2298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:38,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 184 Invalid, 2298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 05:03:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-11-19 05:03:38,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1537. [2021-11-19 05:03:38,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1517 states have (on average 1.114040870138431) internal successors, (1690), 1518 states have internal predecessors, (1690), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:38,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 1708 transitions. [2021-11-19 05:03:38,269 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 1708 transitions. Word has length 89 [2021-11-19 05:03:38,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:38,270 INFO L470 AbstractCegarLoop]: Abstraction has 1537 states and 1708 transitions. [2021-11-19 05:03:38,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 6.351351351351352) internal successors, (235), 34 states have internal predecessors, (235), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:38,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 1708 transitions. [2021-11-19 05:03:38,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-19 05:03:38,275 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:38,275 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:38,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:38,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-19 05:03:38,503 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:03:38,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:38,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1196842719, now seen corresponding path program 9 times [2021-11-19 05:03:38,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:38,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378677329] [2021-11-19 05:03:38,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:38,504 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:38,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:03:38,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:38,951 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:38,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378677329] [2021-11-19 05:03:38,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378677329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:03:38,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126037775] [2021-11-19 05:03:38,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:03:38,951 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:38,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:03:38,960 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:03:38,961 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-19 05:03:39,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-19 05:03:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:03:39,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-19 05:03:39,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:39,472 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 [2021-11-19 05:03:39,894 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 [2021-11-19 05:03:39,909 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:39,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:40,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:03:40,184 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 26 treesize of output 22 [2021-11-19 05:03:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 25 proven. 174 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:40,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126037775] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:03:40,405 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:03:40,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 44 [2021-11-19 05:03:40,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552946356] [2021-11-19 05:03:40,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:03:40,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-19 05:03:40,406 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-19 05:03:40,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1758, Unknown=0, NotChecked=0, Total=1892 [2021-11-19 05:03:40,407 INFO L87 Difference]: Start difference. First operand 1537 states and 1708 transitions. Second operand has 44 states, 41 states have (on average 3.658536585365854) internal successors, (150), 40 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:42,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:42,918 INFO L93 Difference]: Finished difference Result 2290 states and 2516 transitions. [2021-11-19 05:03:42,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:03:42,919 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 41 states have (on average 3.658536585365854) internal successors, (150), 40 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2021-11-19 05:03:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:42,927 INFO L225 Difference]: With dead ends: 2290 [2021-11-19 05:03:42,927 INFO L226 Difference]: Without dead ends: 2224 [2021-11-19 05:03:42,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 163 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1173 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=423, Invalid=4689, Unknown=0, NotChecked=0, Total=5112 [2021-11-19 05:03:42,929 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 340 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 3797 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 340 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 4012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 3797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 170 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:42,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [340 Valid, 381 Invalid, 4012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 3797 Invalid, 0 Unknown, 170 Unchecked, 1.7s Time] [2021-11-19 05:03:42,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-11-19 05:03:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2004. [2021-11-19 05:03:42,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2004 states, 1981 states have (on average 1.1150933871781927) internal successors, (2209), 1982 states have internal predecessors, (2209), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:42,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2004 states to 2004 states and 2230 transitions. [2021-11-19 05:03:42,973 INFO L78 Accepts]: Start accepts. Automaton has 2004 states and 2230 transitions. Word has length 91 [2021-11-19 05:03:42,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:42,973 INFO L470 AbstractCegarLoop]: Abstraction has 2004 states and 2230 transitions. [2021-11-19 05:03:42,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 41 states have (on average 3.658536585365854) internal successors, (150), 40 states have internal predecessors, (150), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:42,974 INFO L276 IsEmpty]: Start isEmpty. Operand 2004 states and 2230 transitions. [2021-11-19 05:03:42,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-19 05:03:42,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:42,980 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 4, 4, 4, 4, 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] [2021-11-19 05:03:43,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:43,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:43,195 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:03:43,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:43,195 INFO L85 PathProgramCache]: Analyzing trace with hash 1667335848, now seen corresponding path program 2 times [2021-11-19 05:03:43,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:43,196 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990622021] [2021-11-19 05:03:43,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:43,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:43,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:43,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:03:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:03:43,469 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:43,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990622021] [2021-11-19 05:03:43,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990622021] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:03:43,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085926832] [2021-11-19 05:03:43,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:03:43,470 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:43,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:03:43,472 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:03:43,473 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-19 05:03:43,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:03:43,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:03:43,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-19 05:03:43,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:43,874 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 [2021-11-19 05:03:44,848 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 [2021-11-19 05:03:44,860 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:03:44,860 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:45,387 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 22 treesize of output 20 [2021-11-19 05:03:45,390 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 32 treesize of output 28 [2021-11-19 05:03:45,924 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 25 proven. 132 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:03:45,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085926832] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:03:45,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:03:45,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 49 [2021-11-19 05:03:45,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067730003] [2021-11-19 05:03:45,925 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:03:45,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-19 05:03:45,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:45,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-19 05:03:45,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=2175, Unknown=0, NotChecked=0, Total=2352 [2021-11-19 05:03:45,926 INFO L87 Difference]: Start difference. First operand 2004 states and 2230 transitions. Second operand has 49 states, 46 states have (on average 4.130434782608695) internal successors, (190), 45 states have internal predecessors, (190), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:47,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:47,641 INFO L93 Difference]: Finished difference Result 2117 states and 2326 transitions. [2021-11-19 05:03:47,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 05:03:47,641 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 46 states have (on average 4.130434782608695) internal successors, (190), 45 states have internal predecessors, (190), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-11-19 05:03:47,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:47,649 INFO L225 Difference]: With dead ends: 2117 [2021-11-19 05:03:47,649 INFO L226 Difference]: Without dead ends: 2026 [2021-11-19 05:03:47,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 161 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1428 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=418, Invalid=4838, Unknown=0, NotChecked=0, Total=5256 [2021-11-19 05:03:47,649 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 194 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 2177 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 2508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 2177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 305 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:47,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 271 Invalid, 2508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 2177 Invalid, 0 Unknown, 305 Unchecked, 1.0s Time] [2021-11-19 05:03:47,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2026 states. [2021-11-19 05:03:47,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2026 to 1509. [2021-11-19 05:03:47,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1509 states, 1489 states have (on average 1.1148421759570182) internal successors, (1660), 1490 states have internal predecessors, (1660), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1509 states to 1509 states and 1678 transitions. [2021-11-19 05:03:47,687 INFO L78 Accepts]: Start accepts. Automaton has 1509 states and 1678 transitions. Word has length 94 [2021-11-19 05:03:47,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:47,687 INFO L470 AbstractCegarLoop]: Abstraction has 1509 states and 1678 transitions. [2021-11-19 05:03:47,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 46 states have (on average 4.130434782608695) internal successors, (190), 45 states have internal predecessors, (190), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1509 states and 1678 transitions. [2021-11-19 05:03:47,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 05:03:47,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:47,693 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:47,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:47,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:47,907 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:03:47,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:47,907 INFO L85 PathProgramCache]: Analyzing trace with hash -695207198, now seen corresponding path program 10 times [2021-11-19 05:03:47,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:47,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036916250] [2021-11-19 05:03:47,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:47,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:48,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:03:48,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:48,384 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 45 proven. 179 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:48,384 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:48,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036916250] [2021-11-19 05:03:48,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036916250] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:03:48,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386617700] [2021-11-19 05:03:48,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:03:48,385 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:48,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:03:48,387 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:03:48,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-19 05:03:48,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:03:48,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:03:48,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 05:03:48,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:48,555 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:03:48,555 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:03:48,958 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 16 treesize of output 12 [2021-11-19 05:03:49,702 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:03:49,702 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 19 treesize of output 19 [2021-11-19 05:03:49,945 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 72 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:49,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:03:51,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 05:03:51,188 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 39 treesize of output 35 [2021-11-19 05:03:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 91 proven. 133 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:03:52,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386617700] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:03:52,794 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:03:52,794 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25, 25] total 63 [2021-11-19 05:03:52,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640020997] [2021-11-19 05:03:52,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:03:52,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-19 05:03:52,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:03:52,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-19 05:03:52,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=3640, Unknown=0, NotChecked=0, Total=4032 [2021-11-19 05:03:52,796 INFO L87 Difference]: Start difference. First operand 1509 states and 1678 transitions. Second operand has 64 states, 60 states have (on average 3.966666666666667) internal successors, (238), 60 states have internal predecessors, (238), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:58,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:03:58,296 INFO L93 Difference]: Finished difference Result 2179 states and 2402 transitions. [2021-11-19 05:03:58,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-19 05:03:58,297 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 60 states have (on average 3.966666666666667) internal successors, (238), 60 states have internal predecessors, (238), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-11-19 05:03:58,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:03:58,307 INFO L225 Difference]: With dead ends: 2179 [2021-11-19 05:03:58,307 INFO L226 Difference]: Without dead ends: 2179 [2021-11-19 05:03:58,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2153 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=1201, Invalid=10141, Unknown=0, NotChecked=0, Total=11342 [2021-11-19 05:03:58,309 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 806 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4966 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 806 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 5428 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 4966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 389 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:03:58,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [806 Valid, 250 Invalid, 5428 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 4966 Invalid, 0 Unknown, 389 Unchecked, 2.9s Time] [2021-11-19 05:03:58,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2179 states. [2021-11-19 05:03:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2179 to 1557. [2021-11-19 05:03:58,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1557 states, 1537 states have (on average 1.1151594014313597) internal successors, (1714), 1538 states have internal predecessors, (1714), 17 states have call successors, (17), 17 states have call predecessors, (17), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1557 states to 1557 states and 1732 transitions. [2021-11-19 05:03:58,353 INFO L78 Accepts]: Start accepts. Automaton has 1557 states and 1732 transitions. Word has length 95 [2021-11-19 05:03:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:03:58,353 INFO L470 AbstractCegarLoop]: Abstraction has 1557 states and 1732 transitions. [2021-11-19 05:03:58,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 60 states have (on average 3.966666666666667) internal successors, (238), 60 states have internal predecessors, (238), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:03:58,354 INFO L276 IsEmpty]: Start isEmpty. Operand 1557 states and 1732 transitions. [2021-11-19 05:03:58,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-19 05:03:58,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:03:58,359 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:03:58,402 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-19 05:03:58,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:58,575 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:03:58,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:03:58,575 INFO L85 PathProgramCache]: Analyzing trace with hash -359311565, now seen corresponding path program 4 times [2021-11-19 05:03:58,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:03:58,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738301692] [2021-11-19 05:03:58,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:03:58,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:03:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:59,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:03:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:03:59,558 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 55 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:03:59,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:03:59,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738301692] [2021-11-19 05:03:59,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738301692] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:03:59,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1154926970] [2021-11-19 05:03:59,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:03:59,560 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:03:59,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:03:59,567 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:03:59,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-19 05:03:59,715 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:03:59,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:03:59,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 05:03:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:03:59,774 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:03:59,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:03:59,792 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:04:00,354 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 16 treesize of output 12 [2021-11-19 05:04:00,423 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-19 05:04:00,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 32 [2021-11-19 05:04:01,687 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:04:01,688 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 56 treesize of output 48 [2021-11-19 05:04:01,699 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-19 05:04:01,700 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 48 treesize of output 33 [2021-11-19 05:04:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 97 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:04:01,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:04:04,452 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 58 treesize of output 54 [2021-11-19 05:04:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 94 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:04:05,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1154926970] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:04:05,112 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:04:05,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 15, 15] total 46 [2021-11-19 05:04:05,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601456508] [2021-11-19 05:04:05,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:04:05,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-19 05:04:05,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-19 05:04:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1913, Unknown=1, NotChecked=0, Total=2070 [2021-11-19 05:04:05,113 INFO L87 Difference]: Start difference. First operand 1557 states and 1732 transitions. Second operand has 46 states, 43 states have (on average 4.953488372093023) internal successors, (213), 42 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:07,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:04:07,821 INFO L93 Difference]: Finished difference Result 2019 states and 2242 transitions. [2021-11-19 05:04:07,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:04:07,822 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 43 states have (on average 4.953488372093023) internal successors, (213), 42 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2021-11-19 05:04:07,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:04:07,831 INFO L225 Difference]: With dead ends: 2019 [2021-11-19 05:04:07,831 INFO L226 Difference]: Without dead ends: 1681 [2021-11-19 05:04:07,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=596, Invalid=4953, Unknown=1, NotChecked=0, Total=5550 [2021-11-19 05:04:07,832 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 262 mSDsluCounter, 896 mSDsCounter, 0 mSdLazyCounter, 1057 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1057 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:04:07,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 945 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1057 Invalid, 0 Unknown, 271 Unchecked, 0.6s Time] [2021-11-19 05:04:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1681 states. [2021-11-19 05:04:07,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1681 to 1341. [2021-11-19 05:04:07,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1341 states, 1323 states have (on average 1.1156462585034013) internal successors, (1476), 1324 states have internal predecessors, (1476), 15 states have call successors, (15), 15 states have call predecessors, (15), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:07,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1341 states to 1341 states and 1492 transitions. [2021-11-19 05:04:07,870 INFO L78 Accepts]: Start accepts. Automaton has 1341 states and 1492 transitions. Word has length 95 [2021-11-19 05:04:07,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:04:07,871 INFO L470 AbstractCegarLoop]: Abstraction has 1341 states and 1492 transitions. [2021-11-19 05:04:07,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 43 states have (on average 4.953488372093023) internal successors, (213), 42 states have internal predecessors, (213), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:07,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1341 states and 1492 transitions. [2021-11-19 05:04:07,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-19 05:04:07,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:04:07,876 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 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] [2021-11-19 05:04:07,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-19 05:04:08,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:04:08,091 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:04:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:08,091 INFO L85 PathProgramCache]: Analyzing trace with hash -66999891, now seen corresponding path program 3 times [2021-11-19 05:04:08,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:08,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497845512] [2021-11-19 05:04:08,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:08,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:08,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:08,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:04:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:04:08,520 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:08,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497845512] [2021-11-19 05:04:08,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497845512] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:04:08,520 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046733032] [2021-11-19 05:04:08,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:04:08,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:04:08,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:04:08,522 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:04:08,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-19 05:04:08,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 05:04:08,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:04:08,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 05:04:08,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:04:08,968 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 [2021-11-19 05:04:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:04:09,446 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:04:09,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:04:09,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 22 [2021-11-19 05:04:09,895 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 25 proven. 155 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:04:09,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046733032] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:04:09,895 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:04:09,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 21] total 43 [2021-11-19 05:04:09,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630108053] [2021-11-19 05:04:09,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:04:09,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-19 05:04:09,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:09,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-19 05:04:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1672, Unknown=0, NotChecked=0, Total=1806 [2021-11-19 05:04:09,897 INFO L87 Difference]: Start difference. First operand 1341 states and 1492 transitions. Second operand has 43 states, 40 states have (on average 4.375) internal successors, (175), 39 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:04:11,719 INFO L93 Difference]: Finished difference Result 1729 states and 1899 transitions. [2021-11-19 05:04:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 05:04:11,720 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 40 states have (on average 4.375) internal successors, (175), 39 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-11-19 05:04:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:04:11,728 INFO L225 Difference]: With dead ends: 1729 [2021-11-19 05:04:11,728 INFO L226 Difference]: Without dead ends: 1521 [2021-11-19 05:04:11,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 176 SyntacticMatches, 3 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=397, Invalid=4159, Unknown=0, NotChecked=0, Total=4556 [2021-11-19 05:04:11,729 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 229 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 2608 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 2712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 2608 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 67 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:04:11,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 286 Invalid, 2712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 2608 Invalid, 0 Unknown, 67 Unchecked, 1.1s Time] [2021-11-19 05:04:11,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2021-11-19 05:04:11,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1417. [2021-11-19 05:04:11,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1417 states, 1401 states have (on average 1.1142041399000713) internal successors, (1561), 1402 states have internal predecessors, (1561), 13 states have call successors, (13), 13 states have call predecessors, (13), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1417 states to 1417 states and 1575 transitions. [2021-11-19 05:04:11,757 INFO L78 Accepts]: Start accepts. Automaton has 1417 states and 1575 transitions. Word has length 98 [2021-11-19 05:04:11,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:04:11,758 INFO L470 AbstractCegarLoop]: Abstraction has 1417 states and 1575 transitions. [2021-11-19 05:04:11,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 40 states have (on average 4.375) internal successors, (175), 39 states have internal predecessors, (175), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:11,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1417 states and 1575 transitions. [2021-11-19 05:04:11,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 05:04:11,762 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:04:11,762 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 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] [2021-11-19 05:04:11,804 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-19 05:04:11,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-19 05:04:11,975 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:04:11,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:11,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1650750538, now seen corresponding path program 4 times [2021-11-19 05:04:11,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:11,976 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97661694] [2021-11-19 05:04:11,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:11,976 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:11,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:12,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:04:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:12,429 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 28 proven. 173 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:04:12,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:12,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97661694] [2021-11-19 05:04:12,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97661694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:04:12,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965884440] [2021-11-19 05:04:12,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:04:12,431 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:04:12,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:04:12,435 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:04:12,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-19 05:04:12,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:04:12,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:04:12,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 05:04:12,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:04:12,642 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:04:12,643 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:04:13,084 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 [2021-11-19 05:04:14,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:04:14,009 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 19 treesize of output 19 [2021-11-19 05:04:14,279 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 50 proven. 151 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:04:14,279 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:04:15,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 05:04:15,618 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 39 treesize of output 35 [2021-11-19 05:04:17,439 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 66 proven. 135 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:04:17,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965884440] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:04:17,440 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:04:17,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23, 23] total 58 [2021-11-19 05:04:17,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583758906] [2021-11-19 05:04:17,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:04:17,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-19 05:04:17,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:17,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-19 05:04:17,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3087, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 05:04:17,442 INFO L87 Difference]: Start difference. First operand 1417 states and 1575 transitions. Second operand has 59 states, 55 states have (on average 4.509090909090909) internal successors, (248), 55 states have internal predecessors, (248), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:22,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:04:22,326 INFO L93 Difference]: Finished difference Result 2276 states and 2468 transitions. [2021-11-19 05:04:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 05:04:22,326 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 55 states have (on average 4.509090909090909) internal successors, (248), 55 states have internal predecessors, (248), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-11-19 05:04:22,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:04:22,335 INFO L225 Difference]: With dead ends: 2276 [2021-11-19 05:04:22,335 INFO L226 Difference]: Without dead ends: 2051 [2021-11-19 05:04:22,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1921 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1106, Invalid=8794, Unknown=0, NotChecked=0, Total=9900 [2021-11-19 05:04:22,337 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1065 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 4175 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1065 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 4654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 4175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 384 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:04:22,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1065 Valid, 210 Invalid, 4654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 4175 Invalid, 0 Unknown, 384 Unchecked, 2.4s Time] [2021-11-19 05:04:22,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2021-11-19 05:04:22,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1290. [2021-11-19 05:04:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1290 states, 1276 states have (on average 1.1144200626959249) internal successors, (1422), 1277 states have internal predecessors, (1422), 11 states have call successors, (11), 11 states have call predecessors, (11), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:22,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1290 states to 1290 states and 1434 transitions. [2021-11-19 05:04:22,371 INFO L78 Accepts]: Start accepts. Automaton has 1290 states and 1434 transitions. Word has length 102 [2021-11-19 05:04:22,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:04:22,371 INFO L470 AbstractCegarLoop]: Abstraction has 1290 states and 1434 transitions. [2021-11-19 05:04:22,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 55 states have (on average 4.509090909090909) internal successors, (248), 55 states have internal predecessors, (248), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:22,372 INFO L276 IsEmpty]: Start isEmpty. Operand 1290 states and 1434 transitions. [2021-11-19 05:04:22,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-19 05:04:22,375 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:04:22,375 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:22,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-19 05:04:22,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-19 05:04:22,599 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:04:22,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1952660917, now seen corresponding path program 8 times [2021-11-19 05:04:22,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:22,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423870287] [2021-11-19 05:04:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:22,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:22,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:23,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:04:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:23,241 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:04:23,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:23,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423870287] [2021-11-19 05:04:23,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423870287] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:04:23,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728167399] [2021-11-19 05:04:23,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:04:23,241 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:04:23,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:04:23,242 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:04:23,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-19 05:04:23,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:04:23,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:04:23,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-19 05:04:23,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:04:23,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:04:23,733 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 21 treesize of output 17 [2021-11-19 05:04:23,792 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 31 treesize of output 30 [2021-11-19 05:04:26,921 INFO L354 Elim1Store]: treesize reduction 125, result has 8.8 percent of original size [2021-11-19 05:04:26,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 68 treesize of output 41 [2021-11-19 05:04:26,970 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 9 proven. 154 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:04:26,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:04:49,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:04:49,717 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 130 treesize of output 124 [2021-11-19 05:04:49,820 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 [2021-11-19 05:04:49,842 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:04:49,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:04:49,853 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 171 treesize of output 161 [2021-11-19 05:04:50,559 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 19 proven. 144 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:04:50,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728167399] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:04:50,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:04:50,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 26] total 68 [2021-11-19 05:04:50,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118329147] [2021-11-19 05:04:50,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:04:50,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-19 05:04:50,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-19 05:04:50,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=4313, Unknown=0, NotChecked=0, Total=4556 [2021-11-19 05:04:50,562 INFO L87 Difference]: Start difference. First operand 1290 states and 1434 transitions. Second operand has 68 states, 67 states have (on average 3.4328358208955225) internal successors, (230), 64 states have internal predecessors, (230), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:53,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:04:53,235 INFO L93 Difference]: Finished difference Result 2034 states and 2250 transitions. [2021-11-19 05:04:53,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:04:53,236 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 3.4328358208955225) internal successors, (230), 64 states have internal predecessors, (230), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-11-19 05:04:53,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:04:53,245 INFO L225 Difference]: With dead ends: 2034 [2021-11-19 05:04:53,245 INFO L226 Difference]: Without dead ends: 1958 [2021-11-19 05:04:53,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 164 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1824 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=501, Invalid=9005, Unknown=0, NotChecked=0, Total=9506 [2021-11-19 05:04:53,247 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 194 mSDsluCounter, 529 mSDsCounter, 0 mSdLazyCounter, 1830 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 613 SdHoareTripleChecker+Invalid, 3360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1510 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:04:53,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 613 Invalid, 3360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1830 Invalid, 0 Unknown, 1510 Unchecked, 0.9s Time] [2021-11-19 05:04:53,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1958 states. [2021-11-19 05:04:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1958 to 1947. [2021-11-19 05:04:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1947 states, 1928 states have (on average 1.1146265560165975) internal successors, (2149), 1929 states have internal predecessors, (2149), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1947 states to 1947 states and 2166 transitions. [2021-11-19 05:04:53,291 INFO L78 Accepts]: Start accepts. Automaton has 1947 states and 2166 transitions. Word has length 102 [2021-11-19 05:04:53,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:04:53,292 INFO L470 AbstractCegarLoop]: Abstraction has 1947 states and 2166 transitions. [2021-11-19 05:04:53,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 3.4328358208955225) internal successors, (230), 64 states have internal predecessors, (230), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:53,292 INFO L276 IsEmpty]: Start isEmpty. Operand 1947 states and 2166 transitions. [2021-11-19 05:04:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-19 05:04:53,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:04:53,298 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:53,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-19 05:04:53,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-19 05:04:53,507 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:04:53,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:53,507 INFO L85 PathProgramCache]: Analyzing trace with hash -1692635886, now seen corresponding path program 9 times [2021-11-19 05:04:53,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:53,508 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75542401] [2021-11-19 05:04:53,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:53,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:53,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:53,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:04:53,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 15 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:04:53,810 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:53,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75542401] [2021-11-19 05:04:53,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75542401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:04:53,810 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874532939] [2021-11-19 05:04:53,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:04:53,810 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:04:53,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:04:53,812 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:04:53,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-19 05:04:54,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-19 05:04:54,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:04:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-19 05:04:54,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:04:54,076 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:04:54,077 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 05:04:54,081 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 15 treesize of output 13 [2021-11-19 05:04:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 28 proven. 152 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:04:55,120 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:04:56,218 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 45 proven. 135 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:04:56,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1874532939] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:04:56,218 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:04:56,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 44 [2021-11-19 05:04:56,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762392166] [2021-11-19 05:04:56,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:04:56,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 05:04:56,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:04:56,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 05:04:56,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 05:04:56,221 INFO L87 Difference]: Start difference. First operand 1947 states and 2166 transitions. Second operand has 45 states, 44 states have (on average 6.75) internal successors, (297), 41 states have internal predecessors, (297), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:58,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:04:58,156 INFO L93 Difference]: Finished difference Result 3115 states and 3474 transitions. [2021-11-19 05:04:58,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 05:04:58,157 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 6.75) internal successors, (297), 41 states have internal predecessors, (297), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-11-19 05:04:58,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:04:58,171 INFO L225 Difference]: With dead ends: 3115 [2021-11-19 05:04:58,171 INFO L226 Difference]: Without dead ends: 3115 [2021-11-19 05:04:58,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=493, Invalid=3413, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 05:04:58,172 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 686 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 2398 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 686 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 2446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:04:58,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [686 Valid, 187 Invalid, 2446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2398 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 05:04:58,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3115 states. [2021-11-19 05:04:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3115 to 2127. [2021-11-19 05:04:58,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2127 states, 2108 states have (on average 1.1148007590132827) internal successors, (2350), 2109 states have internal predecessors, (2350), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2127 states to 2127 states and 2367 transitions. [2021-11-19 05:04:58,215 INFO L78 Accepts]: Start accepts. Automaton has 2127 states and 2367 transitions. Word has length 106 [2021-11-19 05:04:58,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:04:58,215 INFO L470 AbstractCegarLoop]: Abstraction has 2127 states and 2367 transitions. [2021-11-19 05:04:58,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 6.75) internal successors, (297), 41 states have internal predecessors, (297), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:04:58,216 INFO L276 IsEmpty]: Start isEmpty. Operand 2127 states and 2367 transitions. [2021-11-19 05:04:58,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-19 05:04:58,221 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:04:58,222 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:04:58,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-19 05:04:58,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-19 05:04:58,443 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:04:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:04:58,444 INFO L85 PathProgramCache]: Analyzing trace with hash -425802934, now seen corresponding path program 11 times [2021-11-19 05:04:58,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:04:58,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126594881] [2021-11-19 05:04:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:04:58,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:04:58,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:58,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:04:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:04:58,871 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 182 proven. 134 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:04:58,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:04:58,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126594881] [2021-11-19 05:04:58,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1126594881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:04:58,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93445197] [2021-11-19 05:04:58,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:04:58,872 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:04:58,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:04:58,873 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:04:58,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-19 05:04:59,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-19 05:04:59,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:04:59,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-19 05:04:59,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:04:59,053 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:04:59,053 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:05:00,092 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 225 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:00,092 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:05:00,905 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 225 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:00,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93445197] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:05:00,905 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:05:00,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 23, 23] total 59 [2021-11-19 05:05:00,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227017985] [2021-11-19 05:05:00,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:05:00,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-19 05:05:00,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:00,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-19 05:05:00,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=2903, Unknown=0, NotChecked=0, Total=3422 [2021-11-19 05:05:00,907 INFO L87 Difference]: Start difference. First operand 2127 states and 2367 transitions. Second operand has 59 states, 58 states have (on average 4.224137931034483) internal successors, (245), 55 states have internal predecessors, (245), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:02,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:02,577 INFO L93 Difference]: Finished difference Result 3963 states and 4319 transitions. [2021-11-19 05:05:02,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:05:02,577 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 4.224137931034483) internal successors, (245), 55 states have internal predecessors, (245), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2021-11-19 05:05:02,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:02,586 INFO L225 Difference]: With dead ends: 3963 [2021-11-19 05:05:02,586 INFO L226 Difference]: Without dead ends: 3902 [2021-11-19 05:05:02,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 181 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2594 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1212, Invalid=6270, Unknown=0, NotChecked=0, Total=7482 [2021-11-19 05:05:02,588 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 498 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 498 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:02,588 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [498 Valid, 134 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 05:05:02,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3902 states. [2021-11-19 05:05:02,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3902 to 2939. [2021-11-19 05:05:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2939 states, 2916 states have (on average 1.1189986282578874) internal successors, (3263), 2917 states have internal predecessors, (3263), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:02,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2939 states to 2939 states and 3284 transitions. [2021-11-19 05:05:02,644 INFO L78 Accepts]: Start accepts. Automaton has 2939 states and 3284 transitions. Word has length 107 [2021-11-19 05:05:02,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:02,645 INFO L470 AbstractCegarLoop]: Abstraction has 2939 states and 3284 transitions. [2021-11-19 05:05:02,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 4.224137931034483) internal successors, (245), 55 states have internal predecessors, (245), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:02,645 INFO L276 IsEmpty]: Start isEmpty. Operand 2939 states and 3284 transitions. [2021-11-19 05:05:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-11-19 05:05:02,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:02,652 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:02,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-19 05:05:02,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-19 05:05:02,875 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:05:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:02,875 INFO L85 PathProgramCache]: Analyzing trace with hash 1495136589, now seen corresponding path program 12 times [2021-11-19 05:05:02,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:02,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960144604] [2021-11-19 05:05:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:02,876 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:02,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:03,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:05:03,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:03,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:03,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960144604] [2021-11-19 05:05:03,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960144604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:05:03,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307295277] [2021-11-19 05:05:03,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:05:03,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:03,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:03,505 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:03,506 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-19 05:05:03,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-11-19 05:05:03,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:05:03,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-19 05:05:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:04,257 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 [2021-11-19 05:05:04,787 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 [2021-11-19 05:05:04,800 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:04,801 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:05:05,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:05:05,109 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 26 treesize of output 22 [2021-11-19 05:05:05,364 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 33 proven. 312 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:05,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307295277] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:05:05,365 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:05:05,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 50 [2021-11-19 05:05:05,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092636989] [2021-11-19 05:05:05,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:05:05,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-19 05:05:05,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:05,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-19 05:05:05,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2300, Unknown=0, NotChecked=0, Total=2450 [2021-11-19 05:05:05,366 INFO L87 Difference]: Start difference. First operand 2939 states and 3284 transitions. Second operand has 50 states, 47 states have (on average 3.7872340425531914) internal successors, (178), 46 states have internal predecessors, (178), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:08,877 INFO L93 Difference]: Finished difference Result 4253 states and 4704 transitions. [2021-11-19 05:05:08,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-19 05:05:08,878 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 47 states have (on average 3.7872340425531914) internal successors, (178), 46 states have internal predecessors, (178), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2021-11-19 05:05:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:08,884 INFO L225 Difference]: With dead ends: 4253 [2021-11-19 05:05:08,885 INFO L226 Difference]: Without dead ends: 4168 [2021-11-19 05:05:08,885 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 201 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=497, Invalid=6475, Unknown=0, NotChecked=0, Total=6972 [2021-11-19 05:05:08,885 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 506 mSDsluCounter, 359 mSDsCounter, 0 mSdLazyCounter, 5016 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 472 SdHoareTripleChecker+Invalid, 5250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 5016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 171 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:08,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [506 Valid, 472 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 5016 Invalid, 0 Unknown, 171 Unchecked, 2.3s Time] [2021-11-19 05:05:08,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-11-19 05:05:08,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 2959. [2021-11-19 05:05:08,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2959 states, 2936 states have (on average 1.119550408719346) internal successors, (3287), 2937 states have internal predecessors, (3287), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:08,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2959 states to 2959 states and 3308 transitions. [2021-11-19 05:05:08,937 INFO L78 Accepts]: Start accepts. Automaton has 2959 states and 3308 transitions. Word has length 111 [2021-11-19 05:05:08,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:08,938 INFO L470 AbstractCegarLoop]: Abstraction has 2959 states and 3308 transitions. [2021-11-19 05:05:08,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 47 states have (on average 3.7872340425531914) internal successors, (178), 46 states have internal predecessors, (178), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:08,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2959 states and 3308 transitions. [2021-11-19 05:05:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-19 05:05:08,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:08,945 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:08,992 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-19 05:05:09,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-19 05:05:09,171 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:05:09,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:09,172 INFO L85 PathProgramCache]: Analyzing trace with hash -1320726754, now seen corresponding path program 5 times [2021-11-19 05:05:09,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:09,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765991432] [2021-11-19 05:05:09,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:09,172 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:09,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:09,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:05:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 73 proven. 114 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:05:09,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:09,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765991432] [2021-11-19 05:05:09,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765991432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:05:09,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329568389] [2021-11-19 05:05:09,585 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:05:09,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:09,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:09,586 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:09,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-19 05:05:09,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-19 05:05:09,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:05:09,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-19 05:05:09,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:09,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:05:10,142 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 25 treesize of output 21 [2021-11-19 05:05:10,210 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-19 05:05:10,210 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 39 treesize of output 38 [2021-11-19 05:05:23,057 INFO L354 Elim1Store]: treesize reduction 40, result has 54.0 percent of original size [2021-11-19 05:05:23,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 59 treesize of output 79 [2021-11-19 05:05:23,232 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 20 proven. 150 refuted. 22 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:05:23,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:05:27,379 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 21 treesize of output 17 [2021-11-19 05:05:27,394 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-19 05:05:27,394 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 412 treesize of output 368 [2021-11-19 05:05:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 199 backedges. 15 proven. 177 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:05:27,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329568389] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:05:27,924 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:05:27,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 60 [2021-11-19 05:05:27,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430131702] [2021-11-19 05:05:27,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:05:27,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-19 05:05:27,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:27,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-19 05:05:27,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=3253, Unknown=8, NotChecked=0, Total=3540 [2021-11-19 05:05:27,925 INFO L87 Difference]: Start difference. First operand 2959 states and 3308 transitions. Second operand has 60 states, 58 states have (on average 5.137931034482759) internal successors, (298), 56 states have internal predecessors, (298), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:34,538 INFO L93 Difference]: Finished difference Result 3742 states and 4185 transitions. [2021-11-19 05:05:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-19 05:05:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 58 states have (on average 5.137931034482759) internal successors, (298), 56 states have internal predecessors, (298), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-11-19 05:05:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:34,544 INFO L225 Difference]: With dead ends: 3742 [2021-11-19 05:05:34,544 INFO L226 Difference]: Without dead ends: 2898 [2021-11-19 05:05:34,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 21.2s TimeCoverageRelationStatistics Valid=523, Invalid=5789, Unknown=8, NotChecked=0, Total=6320 [2021-11-19 05:05:34,545 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 570 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 744 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1094 SdHoareTripleChecker+Invalid, 1653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 891 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:34,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 1094 Invalid, 1653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 744 Invalid, 0 Unknown, 891 Unchecked, 0.3s Time] [2021-11-19 05:05:34,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2898 states. [2021-11-19 05:05:34,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2898 to 2283. [2021-11-19 05:05:34,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2283 states, 2264 states have (on average 1.1201413427561837) internal successors, (2536), 2265 states have internal predecessors, (2536), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:34,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2283 states to 2283 states and 2553 transitions. [2021-11-19 05:05:34,580 INFO L78 Accepts]: Start accepts. Automaton has 2283 states and 2553 transitions. Word has length 112 [2021-11-19 05:05:34,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:34,580 INFO L470 AbstractCegarLoop]: Abstraction has 2283 states and 2553 transitions. [2021-11-19 05:05:34,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 58 states have (on average 5.137931034482759) internal successors, (298), 56 states have internal predecessors, (298), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:34,581 INFO L276 IsEmpty]: Start isEmpty. Operand 2283 states and 2553 transitions. [2021-11-19 05:05:34,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-19 05:05:34,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:34,584 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:34,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-19 05:05:34,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:34,803 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:05:34,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:34,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1832678864, now seen corresponding path program 13 times [2021-11-19 05:05:34,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:34,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600956958] [2021-11-19 05:05:34,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:34,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:35,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:05:35,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:35,394 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 91 proven. 287 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:35,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:35,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600956958] [2021-11-19 05:05:35,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600956958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:05:35,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203411348] [2021-11-19 05:05:35,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:05:35,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:35,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:35,396 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:35,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-19 05:05:35,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:35,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-19 05:05:35,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 120 proven. 258 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:36,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:05:36,994 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 5 treesize of output 3 [2021-11-19 05:05:37,117 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 120 proven. 258 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:37,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203411348] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:05:37,117 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:05:37,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 55 [2021-11-19 05:05:37,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808240068] [2021-11-19 05:05:37,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:05:37,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-19 05:05:37,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:37,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-19 05:05:37,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=314, Invalid=2766, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 05:05:37,119 INFO L87 Difference]: Start difference. First operand 2283 states and 2553 transitions. Second operand has 56 states, 52 states have (on average 4.423076923076923) internal successors, (230), 52 states have internal predecessors, (230), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:40,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:40,049 INFO L93 Difference]: Finished difference Result 3037 states and 3344 transitions. [2021-11-19 05:05:40,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-19 05:05:40,049 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 52 states have (on average 4.423076923076923) internal successors, (230), 52 states have internal predecessors, (230), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2021-11-19 05:05:40,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:40,055 INFO L225 Difference]: With dead ends: 3037 [2021-11-19 05:05:40,055 INFO L226 Difference]: Without dead ends: 3037 [2021-11-19 05:05:40,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 200 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1730 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=739, Invalid=5741, Unknown=0, NotChecked=0, Total=6480 [2021-11-19 05:05:40,057 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 720 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 5052 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 720 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 5111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 5052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:40,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [720 Valid, 250 Invalid, 5111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 5052 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-19 05:05:40,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-11-19 05:05:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2361. [2021-11-19 05:05:40,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2361 states, 2342 states have (on average 1.1221178479931682) internal successors, (2628), 2343 states have internal predecessors, (2628), 16 states have call successors, (16), 16 states have call predecessors, (16), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2361 states to 2361 states and 2645 transitions. [2021-11-19 05:05:40,112 INFO L78 Accepts]: Start accepts. Automaton has 2361 states and 2645 transitions. Word has length 115 [2021-11-19 05:05:40,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:40,112 INFO L470 AbstractCegarLoop]: Abstraction has 2361 states and 2645 transitions. [2021-11-19 05:05:40,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 52 states have (on average 4.423076923076923) internal successors, (230), 52 states have internal predecessors, (230), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:40,113 INFO L276 IsEmpty]: Start isEmpty. Operand 2361 states and 2645 transitions. [2021-11-19 05:05:40,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-19 05:05:40,117 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:40,117 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 7, 7, 7, 7, 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] [2021-11-19 05:05:40,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-19 05:05:40,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-11-19 05:05:40,340 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:05:40,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:40,341 INFO L85 PathProgramCache]: Analyzing trace with hash 192696655, now seen corresponding path program 5 times [2021-11-19 05:05:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:40,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955349746] [2021-11-19 05:05:40,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:40,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:40,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:40,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:05:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:40,811 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 33 proven. 285 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:05:40,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:40,811 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955349746] [2021-11-19 05:05:40,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955349746] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:05:40,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972510651] [2021-11-19 05:05:40,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:05:40,812 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:40,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:40,813 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:40,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-19 05:05:40,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-19 05:05:40,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:05:40,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 05:05:40,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:41,292 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 [2021-11-19 05:05:41,808 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 [2021-11-19 05:05:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 33 proven. 285 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:05:41,820 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:05:42,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:05:42,091 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 26 treesize of output 22 [2021-11-19 05:05:42,335 INFO L134 CoverageAnalysis]: Checked inductivity of 326 backedges. 33 proven. 285 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:05:42,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972510651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:05:42,336 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:05:42,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 25, 25] total 47 [2021-11-19 05:05:42,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628279794] [2021-11-19 05:05:42,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:05:42,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-19 05:05:42,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:42,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-19 05:05:42,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=2020, Unknown=0, NotChecked=0, Total=2162 [2021-11-19 05:05:42,337 INFO L87 Difference]: Start difference. First operand 2361 states and 2645 transitions. Second operand has 47 states, 44 states have (on average 4.545454545454546) internal successors, (200), 43 states have internal predecessors, (200), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:45,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:45,041 INFO L93 Difference]: Finished difference Result 3704 states and 4108 transitions. [2021-11-19 05:05:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-19 05:05:45,055 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 4.545454545454546) internal successors, (200), 43 states have internal predecessors, (200), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-11-19 05:05:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:45,060 INFO L225 Difference]: With dead ends: 3704 [2021-11-19 05:05:45,060 INFO L226 Difference]: Without dead ends: 3619 [2021-11-19 05:05:45,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 216 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=424, Invalid=5582, Unknown=0, NotChecked=0, Total=6006 [2021-11-19 05:05:45,061 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 358 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 4459 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 419 SdHoareTripleChecker+Invalid, 4670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 4459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 168 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:45,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 419 Invalid, 4670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 4459 Invalid, 0 Unknown, 168 Unchecked, 1.8s Time] [2021-11-19 05:05:45,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-11-19 05:05:45,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 2672. [2021-11-19 05:05:45,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2672 states, 2649 states have (on average 1.120800302000755) internal successors, (2969), 2650 states have internal predecessors, (2969), 20 states have call successors, (20), 20 states have call predecessors, (20), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2672 states to 2672 states and 2990 transitions. [2021-11-19 05:05:45,099 INFO L78 Accepts]: Start accepts. Automaton has 2672 states and 2990 transitions. Word has length 118 [2021-11-19 05:05:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:45,100 INFO L470 AbstractCegarLoop]: Abstraction has 2672 states and 2990 transitions. [2021-11-19 05:05:45,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 4.545454545454546) internal successors, (200), 43 states have internal predecessors, (200), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 2672 states and 2990 transitions. [2021-11-19 05:05:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-19 05:05:45,105 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:45,105 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:45,143 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-19 05:05:45,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:45,331 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:05:45,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:45,332 INFO L85 PathProgramCache]: Analyzing trace with hash -2075170582, now seen corresponding path program 10 times [2021-11-19 05:05:45,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:45,332 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270839509] [2021-11-19 05:05:45,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:45,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:45,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:46,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:05:46,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:46,066 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 11 proven. 235 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:46,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:46,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270839509] [2021-11-19 05:05:46,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270839509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:05:46,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065716674] [2021-11-19 05:05:46,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:05:46,066 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:46,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:46,067 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:46,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-19 05:05:46,209 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:05:46,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:05:46,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-19 05:05:46,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:46,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:05:46,242 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 9 treesize of output 11 [2021-11-19 05:05:46,921 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 15 treesize of output 11 [2021-11-19 05:05:46,985 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-19 05:05:46,986 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 32 treesize of output 31 [2021-11-19 05:05:48,757 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:05:48,757 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 50 treesize of output 42 [2021-11-19 05:05:48,767 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-11-19 05:05:48,768 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 42 treesize of output 28 [2021-11-19 05:05:48,828 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 196 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:48,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:05:51,957 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 56 treesize of output 52 [2021-11-19 05:05:52,893 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 187 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:52,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065716674] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:05:52,893 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:05:52,893 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 20, 20] total 64 [2021-11-19 05:05:52,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902412572] [2021-11-19 05:05:52,893 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:05:52,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-19 05:05:52,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:05:52,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-19 05:05:52,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=3774, Unknown=1, NotChecked=0, Total=4032 [2021-11-19 05:05:52,895 INFO L87 Difference]: Start difference. First operand 2672 states and 2990 transitions. Second operand has 64 states, 62 states have (on average 5.17741935483871) internal successors, (321), 60 states have internal predecessors, (321), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:56,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:05:56,146 INFO L93 Difference]: Finished difference Result 5277 states and 5878 transitions. [2021-11-19 05:05:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-19 05:05:56,147 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 62 states have (on average 5.17741935483871) internal successors, (321), 60 states have internal predecessors, (321), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2021-11-19 05:05:56,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:05:56,159 INFO L225 Difference]: With dead ends: 5277 [2021-11-19 05:05:56,160 INFO L226 Difference]: Without dead ends: 5171 [2021-11-19 05:05:56,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 212 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=821, Invalid=9480, Unknown=1, NotChecked=0, Total=10302 [2021-11-19 05:05:56,162 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 337 mSDsluCounter, 1176 mSDsCounter, 0 mSdLazyCounter, 2137 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 3204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 2137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1014 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:05:56,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 1240 Invalid, 3204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 2137 Invalid, 0 Unknown, 1014 Unchecked, 1.0s Time] [2021-11-19 05:05:56,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5171 states. [2021-11-19 05:05:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5171 to 5010. [2021-11-19 05:05:56,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5010 states, 4980 states have (on average 1.1200803212851405) internal successors, (5578), 4981 states have internal predecessors, (5578), 27 states have call successors, (27), 27 states have call predecessors, (27), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:56,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5010 states to 5010 states and 5606 transitions. [2021-11-19 05:05:56,239 INFO L78 Accepts]: Start accepts. Automaton has 5010 states and 5606 transitions. Word has length 119 [2021-11-19 05:05:56,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:05:56,240 INFO L470 AbstractCegarLoop]: Abstraction has 5010 states and 5606 transitions. [2021-11-19 05:05:56,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 62 states have (on average 5.17741935483871) internal successors, (321), 60 states have internal predecessors, (321), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:05:56,240 INFO L276 IsEmpty]: Start isEmpty. Operand 5010 states and 5606 transitions. [2021-11-19 05:05:56,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-19 05:05:56,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:05:56,248 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:05:56,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-19 05:05:56,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-19 05:05:56,475 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:05:56,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:05:56,475 INFO L85 PathProgramCache]: Analyzing trace with hash -1855309052, now seen corresponding path program 14 times [2021-11-19 05:05:56,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:05:56,476 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644315866] [2021-11-19 05:05:56,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:05:56,476 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:05:56,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:57,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:05:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:05:57,134 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 37 proven. 396 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:05:57,134 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:05:57,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644315866] [2021-11-19 05:05:57,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644315866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:05:57,135 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24028924] [2021-11-19 05:05:57,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:05:57,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:05:57,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:05:57,139 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:05:57,155 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-19 05:05:57,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:05:57,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:05:57,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 427 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-19 05:05:57,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:05:57,720 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 25 treesize of output 21 [2021-11-19 05:06:00,323 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:06:00,324 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-19 05:06:00,641 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 120 proven. 313 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:06:00,641 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:06:02,440 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 36 treesize of output 34 [2021-11-19 05:06:02,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-19 05:06:02,444 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 39 treesize of output 35 [2021-11-19 05:06:02,565 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 120 proven. 313 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:06:02,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24028924] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:06:02,565 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:06:02,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 77 [2021-11-19 05:06:02,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127386552] [2021-11-19 05:06:02,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:06:02,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-19 05:06:02,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:02,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-19 05:06:02,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=5473, Unknown=0, NotChecked=0, Total=5852 [2021-11-19 05:06:02,568 INFO L87 Difference]: Start difference. First operand 5010 states and 5606 transitions. Second operand has 77 states, 74 states have (on average 4.013513513513513) internal successors, (297), 73 states have internal predecessors, (297), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:06,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:06:06,647 INFO L93 Difference]: Finished difference Result 5855 states and 6524 transitions. [2021-11-19 05:06:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-19 05:06:06,648 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 74 states have (on average 4.013513513513513) internal successors, (297), 73 states have internal predecessors, (297), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2021-11-19 05:06:06,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:06:06,654 INFO L225 Difference]: With dead ends: 5855 [2021-11-19 05:06:06,654 INFO L226 Difference]: Without dead ends: 5775 [2021-11-19 05:06:06,655 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 221 SyntacticMatches, 4 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2956 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=791, Invalid=11419, Unknown=0, NotChecked=0, Total=12210 [2021-11-19 05:06:06,656 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 560 mSDsluCounter, 1804 mSDsCounter, 0 mSdLazyCounter, 3685 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1909 SdHoareTripleChecker+Invalid, 4674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 3685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 940 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:06:06,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [560 Valid, 1909 Invalid, 4674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 3685 Invalid, 0 Unknown, 940 Unchecked, 1.7s Time] [2021-11-19 05:06:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5775 states. [2021-11-19 05:06:06,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5775 to 5392. [2021-11-19 05:06:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5392 states, 5357 states have (on average 1.1209632256860182) internal successors, (6005), 5358 states have internal predecessors, (6005), 32 states have call successors, (32), 32 states have call predecessors, (32), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:06,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5392 states to 5392 states and 6038 transitions. [2021-11-19 05:06:06,734 INFO L78 Accepts]: Start accepts. Automaton has 5392 states and 6038 transitions. Word has length 121 [2021-11-19 05:06:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:06:06,734 INFO L470 AbstractCegarLoop]: Abstraction has 5392 states and 6038 transitions. [2021-11-19 05:06:06,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 74 states have (on average 4.013513513513513) internal successors, (297), 73 states have internal predecessors, (297), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:06,735 INFO L276 IsEmpty]: Start isEmpty. Operand 5392 states and 6038 transitions. [2021-11-19 05:06:06,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-19 05:06:06,743 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:06:06,743 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 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] [2021-11-19 05:06:06,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-19 05:06:06,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-19 05:06:06,963 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:06:06,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:06,964 INFO L85 PathProgramCache]: Analyzing trace with hash -664491156, now seen corresponding path program 6 times [2021-11-19 05:06:06,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:06,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085821853] [2021-11-19 05:06:06,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:06,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:06,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:07,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:06:07,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:07,521 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 66 proven. 281 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:06:07,521 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:07,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085821853] [2021-11-19 05:06:07,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085821853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:06:07,521 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052750980] [2021-11-19 05:06:07,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:06:07,521 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:07,521 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:06:07,522 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:06:07,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-19 05:06:07,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-19 05:06:07,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:06:07,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-19 05:06:07,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:06:07,877 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:06:07,877 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:06:09,052 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 91 proven. 256 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:06:09,052 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:06:10,571 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 120 proven. 227 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:06:10,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052750980] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:06:10,572 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:06:10,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 68 [2021-11-19 05:06:10,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000476025] [2021-11-19 05:06:10,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:06:10,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-19 05:06:10,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:10,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-19 05:06:10,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=573, Invalid=4119, Unknown=0, NotChecked=0, Total=4692 [2021-11-19 05:06:10,574 INFO L87 Difference]: Start difference. First operand 5392 states and 6038 transitions. Second operand has 69 states, 67 states have (on average 4.925373134328358) internal successors, (330), 65 states have internal predecessors, (330), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:13,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:06:13,139 INFO L93 Difference]: Finished difference Result 7732 states and 8548 transitions. [2021-11-19 05:06:13,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-19 05:06:13,140 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 67 states have (on average 4.925373134328358) internal successors, (330), 65 states have internal predecessors, (330), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-11-19 05:06:13,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:06:13,148 INFO L225 Difference]: With dead ends: 7732 [2021-11-19 05:06:13,149 INFO L226 Difference]: Without dead ends: 7293 [2021-11-19 05:06:13,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1248, Invalid=8258, Unknown=0, NotChecked=0, Total=9506 [2021-11-19 05:06:13,150 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 834 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 2563 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 2563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:06:13,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 157 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 2563 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 05:06:13,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7293 states. [2021-11-19 05:06:13,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7293 to 6091. [2021-11-19 05:06:13,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6091 states, 6059 states have (on average 1.1208120151840237) internal successors, (6791), 6060 states have internal predecessors, (6791), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:13,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6091 states to 6091 states and 6821 transitions. [2021-11-19 05:06:13,261 INFO L78 Accepts]: Start accepts. Automaton has 6091 states and 6821 transitions. Word has length 122 [2021-11-19 05:06:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:06:13,262 INFO L470 AbstractCegarLoop]: Abstraction has 6091 states and 6821 transitions. [2021-11-19 05:06:13,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 67 states have (on average 4.925373134328358) internal successors, (330), 65 states have internal predecessors, (330), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:13,262 INFO L276 IsEmpty]: Start isEmpty. Operand 6091 states and 6821 transitions. [2021-11-19 05:06:13,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 05:06:13,271 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:06:13,271 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:13,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-19 05:06:13,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:13,499 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:06:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:13,499 INFO L85 PathProgramCache]: Analyzing trace with hash -1204207827, now seen corresponding path program 11 times [2021-11-19 05:06:13,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:13,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891021076] [2021-11-19 05:06:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:13,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:13,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:06:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 28 proven. 239 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:06:13,864 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:13,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891021076] [2021-11-19 05:06:13,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891021076] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:06:13,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275342572] [2021-11-19 05:06:13,864 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:06:13,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:13,865 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:06:13,866 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:06:13,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-19 05:06:14,032 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-19 05:06:14,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:06:14,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-19 05:06:14,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:06:14,875 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:06:14,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:06:15,540 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 21 treesize of output 17 [2021-11-19 05:06:15,910 INFO L134 CoverageAnalysis]: Checked inductivity of 268 backedges. 45 proven. 222 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:06:15,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275342572] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:06:15,910 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:06:15,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 44 [2021-11-19 05:06:15,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440193245] [2021-11-19 05:06:15,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:06:15,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-19 05:06:15,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:15,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-19 05:06:15,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1745, Unknown=0, NotChecked=0, Total=1980 [2021-11-19 05:06:15,912 INFO L87 Difference]: Start difference. First operand 6091 states and 6821 transitions. Second operand has 45 states, 44 states have (on average 6.409090909090909) internal successors, (282), 41 states have internal predecessors, (282), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:06:17,739 INFO L93 Difference]: Finished difference Result 6801 states and 7610 transitions. [2021-11-19 05:06:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-19 05:06:17,740 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 6.409090909090909) internal successors, (282), 41 states have internal predecessors, (282), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2021-11-19 05:06:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:06:17,746 INFO L225 Difference]: With dead ends: 6801 [2021-11-19 05:06:17,746 INFO L226 Difference]: Without dead ends: 6801 [2021-11-19 05:06:17,746 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 220 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=499, Invalid=3407, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 05:06:17,747 INFO L933 BasicCegarLoop]: 117 mSDtfsCounter, 467 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2959 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 467 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 2994 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 2959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:06:17,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [467 Valid, 221 Invalid, 2994 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 2959 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-19 05:06:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6801 states. [2021-11-19 05:06:17,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6801 to 6442. [2021-11-19 05:06:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6410 states have (on average 1.1210608424336974) internal successors, (7186), 6411 states have internal predecessors, (7186), 29 states have call successors, (29), 29 states have call predecessors, (29), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:17,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 7216 transitions. [2021-11-19 05:06:17,830 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 7216 transitions. Word has length 123 [2021-11-19 05:06:17,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:06:17,831 INFO L470 AbstractCegarLoop]: Abstraction has 6442 states and 7216 transitions. [2021-11-19 05:06:17,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 6.409090909090909) internal successors, (282), 41 states have internal predecessors, (282), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:17,831 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 7216 transitions. [2021-11-19 05:06:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 05:06:17,841 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:06:17,841 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 7, 7, 7, 7, 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] [2021-11-19 05:06:17,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-19 05:06:18,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-19 05:06:18,057 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:06:18,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1195991899, now seen corresponding path program 7 times [2021-11-19 05:06:18,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:18,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837005935] [2021-11-19 05:06:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:18,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:18,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:18,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:06:18,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 37 proven. 330 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:06:18,573 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:18,573 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837005935] [2021-11-19 05:06:18,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837005935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:06:18,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047090579] [2021-11-19 05:06:18,574 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:06:18,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:18,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:06:18,575 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:06:18,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-19 05:06:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:18,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 443 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 05:06:18,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:06:19,161 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 [2021-11-19 05:06:20,382 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 [2021-11-19 05:06:20,395 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 37 proven. 330 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:06:20,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:06:20,968 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 22 treesize of output 20 [2021-11-19 05:06:20,970 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 32 treesize of output 28 [2021-11-19 05:06:21,752 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 37 proven. 330 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:06:21,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047090579] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:06:21,752 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:06:21,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 64 [2021-11-19 05:06:21,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194597676] [2021-11-19 05:06:21,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:06:21,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-19 05:06:21,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:21,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-19 05:06:21,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=3801, Unknown=0, NotChecked=0, Total=4032 [2021-11-19 05:06:21,754 INFO L87 Difference]: Start difference. First operand 6442 states and 7216 transitions. Second operand has 64 states, 61 states have (on average 4.295081967213115) internal successors, (262), 60 states have internal predecessors, (262), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:24,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:06:24,446 INFO L93 Difference]: Finished difference Result 6850 states and 7600 transitions. [2021-11-19 05:06:24,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-19 05:06:24,447 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 61 states have (on average 4.295081967213115) internal successors, (262), 60 states have internal predecessors, (262), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-11-19 05:06:24,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:06:24,453 INFO L225 Difference]: With dead ends: 6850 [2021-11-19 05:06:24,453 INFO L226 Difference]: Without dead ends: 6416 [2021-11-19 05:06:24,453 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 212 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2567 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=560, Invalid=8560, Unknown=0, NotChecked=0, Total=9120 [2021-11-19 05:06:24,454 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 368 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 3802 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 4607 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 752 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:06:24,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [368 Valid, 358 Invalid, 4607 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3802 Invalid, 0 Unknown, 752 Unchecked, 1.6s Time] [2021-11-19 05:06:24,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6416 states. [2021-11-19 05:06:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6416 to 5560. [2021-11-19 05:06:24,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5531 states have (on average 1.118965828964021) internal successors, (6189), 5532 states have internal predecessors, (6189), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:24,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 6216 transitions. [2021-11-19 05:06:24,517 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 6216 transitions. Word has length 124 [2021-11-19 05:06:24,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:06:24,518 INFO L470 AbstractCegarLoop]: Abstraction has 5560 states and 6216 transitions. [2021-11-19 05:06:24,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 61 states have (on average 4.295081967213115) internal successors, (262), 60 states have internal predecessors, (262), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:24,518 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 6216 transitions. [2021-11-19 05:06:24,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 05:06:24,526 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:06:24,527 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:24,556 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-19 05:06:24,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:24,743 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:06:24,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:24,743 INFO L85 PathProgramCache]: Analyzing trace with hash -742649247, now seen corresponding path program 6 times [2021-11-19 05:06:24,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:24,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498896958] [2021-11-19 05:06:24,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:24,744 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:24,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:25,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:06:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:25,483 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:06:25,483 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:25,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498896958] [2021-11-19 05:06:25,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498896958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:06:25,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250485860] [2021-11-19 05:06:25,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:06:25,484 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:25,484 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:06:25,484 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:06:25,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-19 05:06:25,647 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-19 05:06:25,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:06:25,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-19 05:06:25,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:06:25,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:06:26,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 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 [2021-11-19 05:06:26,183 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-19 05:06:26,184 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 35 treesize of output 34 [2021-11-19 05:06:29,126 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-11-19 05:06:29,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 52 [2021-11-19 05:06:29,187 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:06:29,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:06:34,338 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)) c_main_~nondetString1~0.base) (+ 5 c_main_~nondetString1~0.offset)) 0)) is different from false [2021-11-19 05:06:34,344 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 56 treesize of output 50 [2021-11-19 05:06:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:06:34,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250485860] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:06:34,968 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:06:34,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 25, 25] total 72 [2021-11-19 05:06:34,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970072582] [2021-11-19 05:06:34,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:06:34,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-19 05:06:34,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:34,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-19 05:06:34,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4760, Unknown=5, NotChecked=138, Total=5112 [2021-11-19 05:06:34,970 INFO L87 Difference]: Start difference. First operand 5560 states and 6216 transitions. Second operand has 72 states, 70 states have (on average 4.714285714285714) internal successors, (330), 68 states have internal predecessors, (330), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:42,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:06:42,296 INFO L93 Difference]: Finished difference Result 6982 states and 7771 transitions. [2021-11-19 05:06:42,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-19 05:06:42,296 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 70 states have (on average 4.714285714285714) internal successors, (330), 68 states have internal predecessors, (330), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-11-19 05:06:42,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:06:42,302 INFO L225 Difference]: With dead ends: 6982 [2021-11-19 05:06:42,302 INFO L226 Difference]: Without dead ends: 6934 [2021-11-19 05:06:42,303 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 217 SyntacticMatches, 3 SemanticMatches, 111 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1880 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=505, Invalid=11924, Unknown=7, NotChecked=220, Total=12656 [2021-11-19 05:06:42,303 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 233 mSDsluCounter, 816 mSDsCounter, 0 mSdLazyCounter, 2757 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 910 SdHoareTripleChecker+Invalid, 5253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2477 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:06:42,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [233 Valid, 910 Invalid, 5253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2757 Invalid, 0 Unknown, 2477 Unchecked, 1.3s Time] [2021-11-19 05:06:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6934 states. [2021-11-19 05:06:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6934 to 6409. [2021-11-19 05:06:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6409 states, 6380 states have (on average 1.1191222570532915) internal successors, (7140), 6381 states have internal predecessors, (7140), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:42,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6409 states to 6409 states and 7167 transitions. [2021-11-19 05:06:42,374 INFO L78 Accepts]: Start accepts. Automaton has 6409 states and 7167 transitions. Word has length 129 [2021-11-19 05:06:42,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:06:42,375 INFO L470 AbstractCegarLoop]: Abstraction has 6409 states and 7167 transitions. [2021-11-19 05:06:42,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 70 states have (on average 4.714285714285714) internal successors, (330), 68 states have internal predecessors, (330), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:42,375 INFO L276 IsEmpty]: Start isEmpty. Operand 6409 states and 7167 transitions. [2021-11-19 05:06:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-11-19 05:06:42,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:06:42,379 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:42,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-19 05:06:42,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:42,580 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:06:42,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:42,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1116922233, now seen corresponding path program 7 times [2021-11-19 05:06:42,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:42,580 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123792081] [2021-11-19 05:06:42,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:42,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:42,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:43,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:06:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:43,333 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 11 proven. 265 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:06:43,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:43,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123792081] [2021-11-19 05:06:43,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123792081] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:06:43,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82528223] [2021-11-19 05:06:43,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:06:43,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:43,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:06:43,337 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:06:43,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-19 05:06:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:43,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-19 05:06:43,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:06:43,544 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:06:43,544 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:06:44,302 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 [2021-11-19 05:06:44,392 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-19 05:06:44,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 38 treesize of output 37 [2021-11-19 05:06:46,513 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:06:46,514 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 51 treesize of output 49 [2021-11-19 05:06:46,523 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-19 05:06:46,524 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 44 treesize of output 29 [2021-11-19 05:06:46,586 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 67 proven. 215 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:06:46,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:06:47,536 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 23 treesize of output 21 [2021-11-19 05:06:47,538 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 33 treesize of output 29 [2021-11-19 05:06:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 67 proven. 215 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:06:48,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82528223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:06:48,836 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:06:48,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 23] total 71 [2021-11-19 05:06:48,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779579879] [2021-11-19 05:06:48,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:06:48,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-19 05:06:48,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:48,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-19 05:06:48,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=4694, Unknown=0, NotChecked=0, Total=4970 [2021-11-19 05:06:48,838 INFO L87 Difference]: Start difference. First operand 6409 states and 7167 transitions. Second operand has 71 states, 70 states have (on average 4.742857142857143) internal successors, (332), 67 states have internal predecessors, (332), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:06:53,757 INFO L93 Difference]: Finished difference Result 9701 states and 10725 transitions. [2021-11-19 05:06:53,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-19 05:06:53,758 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.742857142857143) internal successors, (332), 67 states have internal predecessors, (332), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2021-11-19 05:06:53,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:06:53,765 INFO L225 Difference]: With dead ends: 9701 [2021-11-19 05:06:53,765 INFO L226 Difference]: Without dead ends: 9146 [2021-11-19 05:06:53,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 220 SyntacticMatches, 3 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2761 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=751, Invalid=16019, Unknown=0, NotChecked=0, Total=16770 [2021-11-19 05:06:53,767 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 282 mSDsluCounter, 584 mSDsCounter, 0 mSdLazyCounter, 3030 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 4418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3030 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1371 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:06:53,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 658 Invalid, 4418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3030 Invalid, 0 Unknown, 1371 Unchecked, 1.4s Time] [2021-11-19 05:06:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9146 states. [2021-11-19 05:06:53,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9146 to 6487. [2021-11-19 05:06:53,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6487 states, 6458 states have (on average 1.1209352740786622) internal successors, (7239), 6459 states have internal predecessors, (7239), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:53,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6487 states to 6487 states and 7266 transitions. [2021-11-19 05:06:53,883 INFO L78 Accepts]: Start accepts. Automaton has 6487 states and 7266 transitions. Word has length 129 [2021-11-19 05:06:53,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:06:53,883 INFO L470 AbstractCegarLoop]: Abstraction has 6487 states and 7266 transitions. [2021-11-19 05:06:53,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.742857142857143) internal successors, (332), 67 states have internal predecessors, (332), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:06:53,884 INFO L276 IsEmpty]: Start isEmpty. Operand 6487 states and 7266 transitions. [2021-11-19 05:06:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2021-11-19 05:06:53,888 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:06:53,888 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:06:53,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-19 05:06:54,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-19 05:06:54,089 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:06:54,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:06:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1329111109, now seen corresponding path program 15 times [2021-11-19 05:06:54,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:06:54,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604777787] [2021-11-19 05:06:54,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:06:54,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:06:54,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:54,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:06:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:06:54,664 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:06:54,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:06:54,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604777787] [2021-11-19 05:06:54,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604777787] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:06:54,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366512284] [2021-11-19 05:06:54,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:06:54,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:06:54,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:06:54,667 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:06:54,699 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-19 05:06:55,018 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-11-19 05:06:55,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:06:55,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-19 05:06:55,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:06:55,457 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 21 treesize of output 17 [2021-11-19 05:06:55,886 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 [2021-11-19 05:06:55,898 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:06:55,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:06:56,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:06:56,243 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 26 treesize of output 22 [2021-11-19 05:06:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 41 proven. 490 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:06:56,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366512284] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:06:56,563 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:06:56,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 56 [2021-11-19 05:06:56,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633996284] [2021-11-19 05:06:56,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:06:56,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-19 05:06:56,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:06:56,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-19 05:06:56,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2914, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 05:06:56,564 INFO L87 Difference]: Start difference. First operand 6487 states and 7266 transitions. Second operand has 56 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:01,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:07:01,147 INFO L93 Difference]: Finished difference Result 9299 states and 10323 transitions. [2021-11-19 05:07:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 05:07:01,147 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2021-11-19 05:07:01,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:07:01,154 INFO L225 Difference]: With dead ends: 9299 [2021-11-19 05:07:01,154 INFO L226 Difference]: Without dead ends: 9183 [2021-11-19 05:07:01,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 239 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 2159 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=521, Invalid=8791, Unknown=0, NotChecked=0, Total=9312 [2021-11-19 05:07:01,155 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 556 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 7958 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 556 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 8537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 7958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 490 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:07:01,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [556 Valid, 667 Invalid, 8537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 7958 Invalid, 0 Unknown, 490 Unchecked, 3.2s Time] [2021-11-19 05:07:01,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9183 states. [2021-11-19 05:07:01,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9183 to 8118. [2021-11-19 05:07:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8118 states, 8084 states have (on average 1.1245670460168233) internal successors, (9091), 8085 states have internal predecessors, (9091), 31 states have call successors, (31), 31 states have call predecessors, (31), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:01,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8118 states to 8118 states and 9123 transitions. [2021-11-19 05:07:01,274 INFO L78 Accepts]: Start accepts. Automaton has 8118 states and 9123 transitions. Word has length 131 [2021-11-19 05:07:01,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:07:01,274 INFO L470 AbstractCegarLoop]: Abstraction has 8118 states and 9123 transitions. [2021-11-19 05:07:01,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 53 states have (on average 3.8867924528301887) internal successors, (206), 52 states have internal predecessors, (206), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:01,274 INFO L276 IsEmpty]: Start isEmpty. Operand 8118 states and 9123 transitions. [2021-11-19 05:07:01,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 05:07:01,281 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:07:01,282 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:01,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-19 05:07:01,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-11-19 05:07:01,491 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:07:01,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:01,492 INFO L85 PathProgramCache]: Analyzing trace with hash 320175294, now seen corresponding path program 16 times [2021-11-19 05:07:01,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:01,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130018774] [2021-11-19 05:07:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:01,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:01,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:02,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:07:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:02,292 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 153 proven. 419 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:07:02,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:02,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130018774] [2021-11-19 05:07:02,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130018774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:07:02,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737919083] [2021-11-19 05:07:02,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:07:02,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:07:02,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:07:02,299 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:07:02,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-19 05:07:02,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:07:02,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:07:02,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-19 05:07:02,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:07:02,445 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:07:02,446 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:07:02,869 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 [2021-11-19 05:07:04,166 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:07:04,166 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 19 treesize of output 19 [2021-11-19 05:07:04,488 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 200 proven. 372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:07:04,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:07:06,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 05:07:06,296 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 39 treesize of output 35 [2021-11-19 05:07:08,989 INFO L134 CoverageAnalysis]: Checked inductivity of 573 backedges. 231 proven. 341 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:07:08,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737919083] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:07:08,989 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:07:08,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 33, 33] total 83 [2021-11-19 05:07:08,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910120027] [2021-11-19 05:07:08,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:07:08,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-19 05:07:08,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:08,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-19 05:07:08,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=670, Invalid=6302, Unknown=0, NotChecked=0, Total=6972 [2021-11-19 05:07:08,992 INFO L87 Difference]: Start difference. First operand 8118 states and 9123 transitions. Second operand has 84 states, 80 states have (on average 4.275) internal successors, (342), 80 states have internal predecessors, (342), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:18,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:07:18,325 INFO L93 Difference]: Finished difference Result 12777 states and 14189 transitions. [2021-11-19 05:07:18,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-19 05:07:18,326 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 80 states have (on average 4.275) internal successors, (342), 80 states have internal predecessors, (342), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-11-19 05:07:18,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:07:18,336 INFO L225 Difference]: With dead ends: 12777 [2021-11-19 05:07:18,336 INFO L226 Difference]: Without dead ends: 12709 [2021-11-19 05:07:18,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3853 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1947, Invalid=18075, Unknown=0, NotChecked=0, Total=20022 [2021-11-19 05:07:18,337 INFO L933 BasicCegarLoop]: 155 mSDtfsCounter, 1269 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 9742 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1269 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 10595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 9742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 732 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:07:18,337 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1269 Valid, 312 Invalid, 10595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 9742 Invalid, 0 Unknown, 732 Unchecked, 5.3s Time] [2021-11-19 05:07:18,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12709 states. [2021-11-19 05:07:18,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12709 to 10284. [2021-11-19 05:07:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10284 states, 10250 states have (on average 1.1301463414634145) internal successors, (11584), 10251 states have internal predecessors, (11584), 31 states have call successors, (31), 31 states have call predecessors, (31), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:18,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10284 states to 10284 states and 11616 transitions. [2021-11-19 05:07:18,492 INFO L78 Accepts]: Start accepts. Automaton has 10284 states and 11616 transitions. Word has length 135 [2021-11-19 05:07:18,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:07:18,493 INFO L470 AbstractCegarLoop]: Abstraction has 10284 states and 11616 transitions. [2021-11-19 05:07:18,493 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 80 states have (on average 4.275) internal successors, (342), 80 states have internal predecessors, (342), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:18,493 INFO L276 IsEmpty]: Start isEmpty. Operand 10284 states and 11616 transitions. [2021-11-19 05:07:18,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-19 05:07:18,499 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:07:18,499 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:18,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-19 05:07:18,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:07:18,700 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:07:18,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:18,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1788934035, now seen corresponding path program 8 times [2021-11-19 05:07:18,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:18,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438270515] [2021-11-19 05:07:18,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:18,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:18,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:19,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:07:19,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:19,332 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 11 proven. 301 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:07:19,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:19,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438270515] [2021-11-19 05:07:19,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438270515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:07:19,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944720390] [2021-11-19 05:07:19,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:07:19,332 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:07:19,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:07:19,333 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:07:19,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-19 05:07:19,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:07:19,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:07:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-19 05:07:19,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:07:19,499 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:07:19,500 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:07:20,353 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 [2021-11-19 05:07:20,447 INFO L354 Elim1Store]: treesize reduction 44, result has 18.5 percent of original size [2021-11-19 05:07:20,447 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 38 treesize of output 37 [2021-11-19 05:07:22,744 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:07:22,744 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 51 treesize of output 49 [2021-11-19 05:07:22,758 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-19 05:07:22,758 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 44 treesize of output 29 [2021-11-19 05:07:22,825 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 73 proven. 245 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:07:22,825 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:07:23,895 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 23 treesize of output 21 [2021-11-19 05:07:23,897 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 33 treesize of output 29 [2021-11-19 05:07:25,328 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 73 proven. 245 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:07:25,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [944720390] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:07:25,328 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:07:25,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24, 23] total 71 [2021-11-19 05:07:25,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051143954] [2021-11-19 05:07:25,329 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:07:25,329 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-19 05:07:25,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:25,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-19 05:07:25,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4690, Unknown=0, NotChecked=0, Total=4970 [2021-11-19 05:07:25,330 INFO L87 Difference]: Start difference. First operand 10284 states and 11616 transitions. Second operand has 71 states, 70 states have (on average 4.785714285714286) internal successors, (335), 67 states have internal predecessors, (335), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:07:32,081 INFO L93 Difference]: Finished difference Result 14882 states and 16683 transitions. [2021-11-19 05:07:32,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-19 05:07:32,081 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 4.785714285714286) internal successors, (335), 67 states have internal predecessors, (335), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2021-11-19 05:07:32,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:07:32,095 INFO L225 Difference]: With dead ends: 14882 [2021-11-19 05:07:32,095 INFO L226 Difference]: Without dead ends: 13698 [2021-11-19 05:07:32,096 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 235 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2881 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=911, Invalid=16119, Unknown=0, NotChecked=0, Total=17030 [2021-11-19 05:07:32,096 INFO L933 BasicCegarLoop]: 131 mSDtfsCounter, 432 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 6160 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 432 SdHoareTripleChecker+Valid, 1355 SdHoareTripleChecker+Invalid, 9924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 6160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3710 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-19 05:07:32,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [432 Valid, 1355 Invalid, 9924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 6160 Invalid, 0 Unknown, 3710 Unchecked, 3.1s Time] [2021-11-19 05:07:32,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13698 states. [2021-11-19 05:07:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13698 to 10187. [2021-11-19 05:07:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10187 states, 10153 states have (on average 1.1292228897862702) internal successors, (11465), 10154 states have internal predecessors, (11465), 31 states have call successors, (31), 31 states have call predecessors, (31), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:32,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10187 states to 10187 states and 11497 transitions. [2021-11-19 05:07:32,231 INFO L78 Accepts]: Start accepts. Automaton has 10187 states and 11497 transitions. Word has length 135 [2021-11-19 05:07:32,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:07:32,232 INFO L470 AbstractCegarLoop]: Abstraction has 10187 states and 11497 transitions. [2021-11-19 05:07:32,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 4.785714285714286) internal successors, (335), 67 states have internal predecessors, (335), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:32,232 INFO L276 IsEmpty]: Start isEmpty. Operand 10187 states and 11497 transitions. [2021-11-19 05:07:32,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-19 05:07:32,237 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:07:32,237 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:07:32,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-19 05:07:32,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:07:32,439 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:07:32,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:32,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1450973871, now seen corresponding path program 12 times [2021-11-19 05:07:32,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:32,440 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013997925] [2021-11-19 05:07:32,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:32,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:32,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:33,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:07:33,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:33,378 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:07:33,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:33,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013997925] [2021-11-19 05:07:33,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013997925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:07:33,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356468478] [2021-11-19 05:07:33,379 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:07:33,379 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:07:33,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:07:33,383 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:07:33,387 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-19 05:07:33,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-19 05:07:33,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:07:33,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-19 05:07:33,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:07:33,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:07:34,287 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 21 treesize of output 17 [2021-11-19 05:07:34,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-19 05:07:39,181 INFO L354 Elim1Store]: treesize reduction 190, result has 4.0 percent of original size [2021-11-19 05:07:39,181 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 80 treesize of output 40 [2021-11-19 05:07:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 13 proven. 333 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:07:39,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:07:41,588 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~length2~0 Int)) (let ((.cse3 (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) c_main_~nondetString2~0.offset main_~length2~0) 0))) (let ((.cse1 (select (store |c_#memory_int| c_main_~nondetString2~0.base .cse3) c_main_~nondetString1~0.base))) (let ((.cse2 (select .cse3 c_main_~nondetString2~0.offset)) (.cse0 (select .cse1 (+ 2 c_main_~nondetString1~0.offset)))) (or (= .cse0 0) (not (= (select .cse1 (+ 6 c_main_~nondetString1~0.offset)) .cse2)) (not (= .cse2 (select .cse1 c_main_~nondetString1~0.offset))) (not (= .cse2 .cse0))))))) is different from false [2021-11-19 05:07:41,633 INFO L354 Elim1Store]: treesize reduction 113, result has 26.1 percent of original size [2021-11-19 05:07:41,633 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 7 case distinctions, treesize of input 580 treesize of output 465 [2021-11-19 05:07:41,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:07:41,645 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 389 treesize of output 363 [2021-11-19 05:07:41,671 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 458 treesize of output 434 [2021-11-19 05:07:41,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:07:41,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:07:41,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:07:41,817 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:07:41,857 INFO L354 Elim1Store]: treesize reduction 17, result has 73.4 percent of original size [2021-11-19 05:07:41,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 157 [2021-11-19 05:07:43,122 INFO L134 CoverageAnalysis]: Checked inductivity of 347 backedges. 63 proven. 283 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:07:43,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356468478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:07:43,123 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:07:43,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 36, 36] total 90 [2021-11-19 05:07:43,123 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470150084] [2021-11-19 05:07:43,123 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:07:43,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-19 05:07:43,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:43,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-19 05:07:43,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=362, Invalid=7473, Unknown=1, NotChecked=174, Total=8010 [2021-11-19 05:07:43,125 INFO L87 Difference]: Start difference. First operand 10187 states and 11497 transitions. Second operand has 90 states, 88 states have (on average 3.7613636363636362) internal successors, (331), 86 states have internal predecessors, (331), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:49,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:07:49,456 INFO L93 Difference]: Finished difference Result 12663 states and 14224 transitions. [2021-11-19 05:07:49,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-19 05:07:49,457 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 88 states have (on average 3.7613636363636362) internal successors, (331), 86 states have internal predecessors, (331), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-11-19 05:07:49,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:07:49,468 INFO L225 Difference]: With dead ends: 12663 [2021-11-19 05:07:49,468 INFO L226 Difference]: Without dead ends: 12551 [2021-11-19 05:07:49,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 220 SyntacticMatches, 2 SemanticMatches, 143 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 3990 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=902, Invalid=19693, Unknown=1, NotChecked=284, Total=20880 [2021-11-19 05:07:49,469 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 456 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 4744 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 8680 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 4744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3896 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:07:49,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 628 Invalid, 8680 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 4744 Invalid, 0 Unknown, 3896 Unchecked, 2.2s Time] [2021-11-19 05:07:49,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12551 states. [2021-11-19 05:07:49,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12551 to 12130. [2021-11-19 05:07:49,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12130 states, 12087 states have (on average 1.1278232812112188) internal successors, (13632), 12088 states have internal predecessors, (13632), 40 states have call successors, (40), 40 states have call predecessors, (40), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12130 states to 12130 states and 13673 transitions. [2021-11-19 05:07:49,626 INFO L78 Accepts]: Start accepts. Automaton has 12130 states and 13673 transitions. Word has length 136 [2021-11-19 05:07:49,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:07:49,627 INFO L470 AbstractCegarLoop]: Abstraction has 12130 states and 13673 transitions. [2021-11-19 05:07:49,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 88 states have (on average 3.7613636363636362) internal successors, (331), 86 states have internal predecessors, (331), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:07:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 12130 states and 13673 transitions. [2021-11-19 05:07:49,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-19 05:07:49,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:07:49,634 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 9, 9, 9, 9, 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] [2021-11-19 05:07:49,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-19 05:07:49,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:07:49,834 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:07:49,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:07:49,835 INFO L85 PathProgramCache]: Analyzing trace with hash 1237284081, now seen corresponding path program 8 times [2021-11-19 05:07:49,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:07:49,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147247920] [2021-11-19 05:07:49,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:07:49,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:07:49,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:50,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:07:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:07:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 41 proven. 455 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:07:50,429 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:07:50,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147247920] [2021-11-19 05:07:50,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2147247920] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:07:50,429 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356190112] [2021-11-19 05:07:50,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:07:50,430 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:07:50,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:07:50,431 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:07:50,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-19 05:07:50,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:07:50,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:07:50,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-19 05:07:50,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:07:50,915 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 25 treesize of output 21 [2021-11-19 05:07:53,593 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:07:53,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 33 [2021-11-19 05:07:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 120 proven. 376 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:07:53,887 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:07:55,911 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 36 treesize of output 34 [2021-11-19 05:07:55,914 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 46 treesize of output 42 [2021-11-19 05:07:55,918 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 38 treesize of output 30 [2021-11-19 05:07:56,111 INFO L134 CoverageAnalysis]: Checked inductivity of 504 backedges. 120 proven. 376 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:07:56,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356190112] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:07:56,111 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:07:56,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 77 [2021-11-19 05:07:56,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028773041] [2021-11-19 05:07:56,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:07:56,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-19 05:07:56,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:07:56,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-19 05:07:56,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=5473, Unknown=0, NotChecked=0, Total=5852 [2021-11-19 05:07:56,113 INFO L87 Difference]: Start difference. First operand 12130 states and 13673 transitions. Second operand has 77 states, 74 states have (on average 4.5) internal successors, (333), 73 states have internal predecessors, (333), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:08:02,217 INFO L93 Difference]: Finished difference Result 15913 states and 17721 transitions. [2021-11-19 05:08:02,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-19 05:08:02,218 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 74 states have (on average 4.5) internal successors, (333), 73 states have internal predecessors, (333), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2021-11-19 05:08:02,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:08:02,230 INFO L225 Difference]: With dead ends: 15913 [2021-11-19 05:08:02,230 INFO L226 Difference]: Without dead ends: 15807 [2021-11-19 05:08:02,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 274 SyntacticMatches, 4 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3919 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=995, Invalid=14755, Unknown=0, NotChecked=0, Total=15750 [2021-11-19 05:08:02,232 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 999 mSDsluCounter, 1916 mSDsCounter, 0 mSdLazyCounter, 3852 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 2087 SdHoareTripleChecker+Invalid, 9671 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 3852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 5776 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:08:02,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [999 Valid, 2087 Invalid, 9671 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 3852 Invalid, 0 Unknown, 5776 Unchecked, 1.6s Time] [2021-11-19 05:08:02,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15807 states. [2021-11-19 05:08:02,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15807 to 12749. [2021-11-19 05:08:02,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12749 states, 12706 states have (on average 1.1273414135054305) internal successors, (14324), 12707 states have internal predecessors, (14324), 40 states have call successors, (40), 40 states have call predecessors, (40), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:02,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12749 states to 12749 states and 14365 transitions. [2021-11-19 05:08:02,473 INFO L78 Accepts]: Start accepts. Automaton has 12749 states and 14365 transitions. Word has length 138 [2021-11-19 05:08:02,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:08:02,474 INFO L470 AbstractCegarLoop]: Abstraction has 12749 states and 14365 transitions. [2021-11-19 05:08:02,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 74 states have (on average 4.5) internal successors, (333), 73 states have internal predecessors, (333), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:02,474 INFO L276 IsEmpty]: Start isEmpty. Operand 12749 states and 14365 transitions. [2021-11-19 05:08:02,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-19 05:08:02,486 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:08:02,486 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:02,516 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-11-19 05:08:02,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:08:02,703 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:08:02,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:02,704 INFO L85 PathProgramCache]: Analyzing trace with hash -1226362164, now seen corresponding path program 13 times [2021-11-19 05:08:02,704 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:02,704 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979361845] [2021-11-19 05:08:02,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:02,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:02,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:03,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:08:03,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:03,088 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 45 proven. 326 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:08:03,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:03,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979361845] [2021-11-19 05:08:03,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979361845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:08:03,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802428159] [2021-11-19 05:08:03,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:08:03,089 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:08:03,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:08:03,090 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:08:03,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-19 05:08:03,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:03,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-19 05:08:03,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:08:03,284 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:08:03,284 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 05:08:03,287 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 15 treesize of output 13 [2021-11-19 05:08:04,431 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 66 proven. 305 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:08:04,431 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:08:05,730 INFO L134 CoverageAnalysis]: Checked inductivity of 372 backedges. 91 proven. 280 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:08:05,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802428159] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:08:05,731 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:08:05,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 55 [2021-11-19 05:08:05,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068858870] [2021-11-19 05:08:05,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:08:05,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-19 05:08:05,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:05,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-19 05:08:05,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2784, Unknown=0, NotChecked=0, Total=3080 [2021-11-19 05:08:05,732 INFO L87 Difference]: Start difference. First operand 12749 states and 14365 transitions. Second operand has 56 states, 55 states have (on average 7.054545454545455) internal successors, (388), 52 states have internal predecessors, (388), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:08,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:08:08,114 INFO L93 Difference]: Finished difference Result 17189 states and 19410 transitions. [2021-11-19 05:08:08,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-19 05:08:08,115 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 7.054545454545455) internal successors, (388), 52 states have internal predecessors, (388), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2021-11-19 05:08:08,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:08:08,129 INFO L225 Difference]: With dead ends: 17189 [2021-11-19 05:08:08,129 INFO L226 Difference]: Without dead ends: 17189 [2021-11-19 05:08:08,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 324 GetRequests, 245 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=707, Invalid=5613, Unknown=0, NotChecked=0, Total=6320 [2021-11-19 05:08:08,130 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 578 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 3827 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 3871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 3827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:08:08,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 211 Invalid, 3871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 3827 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-19 05:08:08,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17189 states. [2021-11-19 05:08:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17189 to 13326. [2021-11-19 05:08:08,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13326 states, 13283 states have (on average 1.1276067153504479) internal successors, (14978), 13284 states have internal predecessors, (14978), 40 states have call successors, (40), 40 states have call predecessors, (40), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:08,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13326 states to 13326 states and 15019 transitions. [2021-11-19 05:08:08,267 INFO L78 Accepts]: Start accepts. Automaton has 13326 states and 15019 transitions. Word has length 140 [2021-11-19 05:08:08,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:08:08,267 INFO L470 AbstractCegarLoop]: Abstraction has 13326 states and 15019 transitions. [2021-11-19 05:08:08,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 7.054545454545455) internal successors, (388), 52 states have internal predecessors, (388), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:08,268 INFO L276 IsEmpty]: Start isEmpty. Operand 13326 states and 15019 transitions. [2021-11-19 05:08:08,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-19 05:08:08,279 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:08:08,280 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:08,321 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-19 05:08:08,499 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:08:08,499 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:08:08,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:08,499 INFO L85 PathProgramCache]: Analyzing trace with hash -55341959, now seen corresponding path program 9 times [2021-11-19 05:08:08,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:08,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321841711] [2021-11-19 05:08:08,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:08,500 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:08,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:08:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 115 proven. 239 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 05:08:08,870 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:08,870 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321841711] [2021-11-19 05:08:08,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321841711] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:08:08,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035837210] [2021-11-19 05:08:08,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:08:08,871 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:08:08,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:08:08,872 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:08:08,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-19 05:08:09,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-19 05:08:09,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:08:09,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-19 05:08:09,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:08:09,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:08:09,411 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 21 treesize of output 17 [2021-11-19 05:08:09,463 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-19 05:08:09,463 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 35 treesize of output 34 [2021-11-19 05:08:12,400 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-11-19 05:08:12,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 52 [2021-11-19 05:08:12,444 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 16 proven. 343 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 05:08:12,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:08:14,030 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (main_~length2~0 Int)) (= (select (select (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)) c_main_~nondetString1~0.base) (+ 5 c_main_~nondetString1~0.offset)) 0)) is different from false [2021-11-19 05:08:14,038 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 56 treesize of output 50 [2021-11-19 05:08:14,517 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 11 proven. 348 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-19 05:08:14,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035837210] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:08:14,517 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:08:14,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25, 25] total 61 [2021-11-19 05:08:14,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067333316] [2021-11-19 05:08:14,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:08:14,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-19 05:08:14,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:14,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-19 05:08:14,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=3357, Unknown=1, NotChecked=116, Total=3660 [2021-11-19 05:08:14,519 INFO L87 Difference]: Start difference. First operand 13326 states and 15019 transitions. Second operand has 61 states, 59 states have (on average 5.0508474576271185) internal successors, (298), 57 states have internal predecessors, (298), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:20,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:08:20,130 INFO L93 Difference]: Finished difference Result 12689 states and 14244 transitions. [2021-11-19 05:08:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-19 05:08:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 59 states have (on average 5.0508474576271185) internal successors, (298), 57 states have internal predecessors, (298), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 141 [2021-11-19 05:08:20,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:08:20,139 INFO L225 Difference]: With dead ends: 12689 [2021-11-19 05:08:20,139 INFO L226 Difference]: Without dead ends: 10432 [2021-11-19 05:08:20,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 242 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=354, Invalid=6453, Unknown=3, NotChecked=162, Total=6972 [2021-11-19 05:08:20,141 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 186 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 1569 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 1484 SdHoareTripleChecker+Invalid, 2108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 521 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:08:20,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 1484 Invalid, 2108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1569 Invalid, 0 Unknown, 521 Unchecked, 0.7s Time] [2021-11-19 05:08:20,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10432 states. [2021-11-19 05:08:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10432 to 8390. [2021-11-19 05:08:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8390 states, 8353 states have (on average 1.1278582545193343) internal successors, (9421), 8354 states have internal predecessors, (9421), 34 states have call successors, (34), 34 states have call predecessors, (34), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:20,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8390 states to 8390 states and 9456 transitions. [2021-11-19 05:08:20,239 INFO L78 Accepts]: Start accepts. Automaton has 8390 states and 9456 transitions. Word has length 141 [2021-11-19 05:08:20,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:08:20,239 INFO L470 AbstractCegarLoop]: Abstraction has 8390 states and 9456 transitions. [2021-11-19 05:08:20,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 59 states have (on average 5.0508474576271185) internal successors, (298), 57 states have internal predecessors, (298), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:20,239 INFO L276 IsEmpty]: Start isEmpty. Operand 8390 states and 9456 transitions. [2021-11-19 05:08:20,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-19 05:08:20,246 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:08:20,246 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 9, 9, 9, 9, 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] [2021-11-19 05:08:20,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-19 05:08:20,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-11-19 05:08:20,449 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:08:20,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:20,449 INFO L85 PathProgramCache]: Analyzing trace with hash 476340605, now seen corresponding path program 9 times [2021-11-19 05:08:20,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:20,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489074559] [2021-11-19 05:08:20,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:20,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:20,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:21,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:08:21,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:21,048 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:08:21,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:21,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489074559] [2021-11-19 05:08:21,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489074559] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:08:21,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63664478] [2021-11-19 05:08:21,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:08:21,050 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:08:21,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:08:21,053 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:08:21,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-19 05:08:21,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-19 05:08:21,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:08:21,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-19 05:08:21,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:08:21,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-19 05:08:22,446 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 [2021-11-19 05:08:22,458 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:08:22,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:08:22,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:08:22,828 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 26 treesize of output 22 [2021-11-19 05:08:23,102 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 45 proven. 512 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:08:23,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63664478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:08:23,103 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:08:23,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 29, 29] total 53 [2021-11-19 05:08:23,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525069489] [2021-11-19 05:08:23,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:08:23,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-19 05:08:23,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:23,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-19 05:08:23,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2598, Unknown=0, NotChecked=0, Total=2756 [2021-11-19 05:08:23,104 INFO L87 Difference]: Start difference. First operand 8390 states and 9456 transitions. Second operand has 53 states, 50 states have (on average 4.62) internal successors, (231), 49 states have internal predecessors, (231), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:26,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:08:26,832 INFO L93 Difference]: Finished difference Result 8998 states and 10025 transitions. [2021-11-19 05:08:26,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 05:08:26,833 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 4.62) internal successors, (231), 49 states have internal predecessors, (231), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-11-19 05:08:26,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:08:26,840 INFO L225 Difference]: With dead ends: 8998 [2021-11-19 05:08:26,840 INFO L226 Difference]: Without dead ends: 8297 [2021-11-19 05:08:26,840 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 266 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 1903 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=489, Invalid=7701, Unknown=0, NotChecked=0, Total=8190 [2021-11-19 05:08:26,841 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 316 mSDsluCounter, 400 mSDsCounter, 0 mSdLazyCounter, 5661 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 6301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 597 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:08:26,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 524 Invalid, 6301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 5661 Invalid, 0 Unknown, 597 Unchecked, 2.4s Time] [2021-11-19 05:08:26,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8297 states. [2021-11-19 05:08:26,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8297 to 7293. [2021-11-19 05:08:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7293 states, 7260 states have (on average 1.1239669421487604) internal successors, (8160), 7261 states have internal predecessors, (8160), 30 states have call successors, (30), 30 states have call predecessors, (30), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:26,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7293 states to 7293 states and 8191 transitions. [2021-11-19 05:08:26,915 INFO L78 Accepts]: Start accepts. Automaton has 7293 states and 8191 transitions. Word has length 144 [2021-11-19 05:08:26,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:08:26,916 INFO L470 AbstractCegarLoop]: Abstraction has 7293 states and 8191 transitions. [2021-11-19 05:08:26,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 4.62) internal successors, (231), 49 states have internal predecessors, (231), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:26,916 INFO L276 IsEmpty]: Start isEmpty. Operand 7293 states and 8191 transitions. [2021-11-19 05:08:26,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-19 05:08:26,921 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:08:26,921 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:26,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-19 05:08:27,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:08:27,122 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:08:27,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:27,122 INFO L85 PathProgramCache]: Analyzing trace with hash -354094760, now seen corresponding path program 10 times [2021-11-19 05:08:27,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:27,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995137827] [2021-11-19 05:08:27,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:27,123 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:27,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:27,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:08:27,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:27,718 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 109 proven. 273 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:08:27,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:27,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995137827] [2021-11-19 05:08:27,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995137827] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:08:27,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634443392] [2021-11-19 05:08:27,719 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:08:27,719 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:08:27,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:08:27,720 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:08:27,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-19 05:08:27,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:08:27,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:08:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-19 05:08:27,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:08:27,908 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:08:27,909 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:08:29,100 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-11-19 05:08:29,175 INFO L354 Elim1Store]: treesize reduction 47, result has 19.0 percent of original size [2021-11-19 05:08:29,176 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 33 treesize of output 32 [2021-11-19 05:08:31,664 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:08:31,664 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 56 treesize of output 48 [2021-11-19 05:08:31,674 INFO L354 Elim1Store]: treesize reduction 40, result has 7.0 percent of original size [2021-11-19 05:08:31,674 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 48 treesize of output 34 [2021-11-19 05:08:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 310 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:08:31,705 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:08:34,281 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 56 treesize of output 52 [2021-11-19 05:08:35,920 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 299 proven. 89 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:08:35,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634443392] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:08:35,920 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:08:35,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 27, 27] total 70 [2021-11-19 05:08:35,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530997440] [2021-11-19 05:08:35,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:08:35,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-19 05:08:35,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:35,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-19 05:08:35,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=4475, Unknown=1, NotChecked=0, Total=4830 [2021-11-19 05:08:35,922 INFO L87 Difference]: Start difference. First operand 7293 states and 8191 transitions. Second operand has 70 states, 68 states have (on average 5.4411764705882355) internal successors, (370), 66 states have internal predecessors, (370), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:48,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:08:48,546 INFO L93 Difference]: Finished difference Result 12309 states and 13772 transitions. [2021-11-19 05:08:48,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-19 05:08:48,546 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 68 states have (on average 5.4411764705882355) internal successors, (370), 66 states have internal predecessors, (370), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-11-19 05:08:48,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:08:48,555 INFO L225 Difference]: With dead ends: 12309 [2021-11-19 05:08:48,555 INFO L226 Difference]: Without dead ends: 10218 [2021-11-19 05:08:48,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 274 SyntacticMatches, 8 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5412 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=1651, Invalid=21299, Unknown=2, NotChecked=0, Total=22952 [2021-11-19 05:08:48,557 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 582 mSDsluCounter, 718 mSDsCounter, 0 mSdLazyCounter, 3111 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 582 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 5826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 3111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2609 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:08:48,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [582 Valid, 822 Invalid, 5826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 3111 Invalid, 0 Unknown, 2609 Unchecked, 1.6s Time] [2021-11-19 05:08:48,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10218 states. [2021-11-19 05:08:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10218 to 8566. [2021-11-19 05:08:48,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8566 states, 8533 states have (on average 1.1184811906715106) internal successors, (9544), 8534 states have internal predecessors, (9544), 30 states have call successors, (30), 30 states have call predecessors, (30), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:48,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8566 states to 8566 states and 9575 transitions. [2021-11-19 05:08:48,687 INFO L78 Accepts]: Start accepts. Automaton has 8566 states and 9575 transitions. Word has length 146 [2021-11-19 05:08:48,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:08:48,687 INFO L470 AbstractCegarLoop]: Abstraction has 8566 states and 9575 transitions. [2021-11-19 05:08:48,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 68 states have (on average 5.4411764705882355) internal successors, (370), 66 states have internal predecessors, (370), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:48,687 INFO L276 IsEmpty]: Start isEmpty. Operand 8566 states and 9575 transitions. [2021-11-19 05:08:48,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-19 05:08:48,692 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:08:48,692 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:08:48,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-19 05:08:48,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-19 05:08:48,893 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:08:48,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash -2105255130, now seen corresponding path program 17 times [2021-11-19 05:08:48,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:48,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970376466] [2021-11-19 05:08:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:48,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:49,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:08:49,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:49,388 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 414 proven. 298 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:08:49,388 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:49,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970376466] [2021-11-19 05:08:49,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970376466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:08:49,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439430271] [2021-11-19 05:08:49,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:08:49,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:08:49,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:08:49,393 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:08:49,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-19 05:08:49,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-19 05:08:49,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:08:49,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-19 05:08:49,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:08:49,641 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:08:49,641 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:08:51,123 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 481 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:08:51,123 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:08:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 713 backedges. 481 proven. 231 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:08:52,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439430271] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:08:52,212 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:08:52,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 31, 31] total 79 [2021-11-19 05:08:52,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716614162] [2021-11-19 05:08:52,212 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:08:52,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-19 05:08:52,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:08:52,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-19 05:08:52,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=965, Invalid=5197, Unknown=0, NotChecked=0, Total=6162 [2021-11-19 05:08:52,214 INFO L87 Difference]: Start difference. First operand 8566 states and 9575 transitions. Second operand has 79 states, 78 states have (on average 4.371794871794871) internal successors, (341), 75 states have internal predecessors, (341), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:54,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:08:54,537 INFO L93 Difference]: Finished difference Result 13979 states and 15228 transitions. [2021-11-19 05:08:54,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 05:08:54,537 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 4.371794871794871) internal successors, (341), 75 states have internal predecessors, (341), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2021-11-19 05:08:54,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:08:54,555 INFO L225 Difference]: With dead ends: 13979 [2021-11-19 05:08:54,555 INFO L226 Difference]: Without dead ends: 13321 [2021-11-19 05:08:54,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 249 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5233 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2346, Invalid=11934, Unknown=0, NotChecked=0, Total=14280 [2021-11-19 05:08:54,557 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 538 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 2185 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 538 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 2260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 2185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-19 05:08:54,557 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [538 Valid, 162 Invalid, 2260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 2185 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-19 05:08:54,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13321 states. [2021-11-19 05:08:54,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13321 to 9705. [2021-11-19 05:08:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9705 states, 9670 states have (on average 1.1195449844881076) internal successors, (10826), 9671 states have internal predecessors, (10826), 32 states have call successors, (32), 32 states have call predecessors, (32), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9705 states to 9705 states and 10859 transitions. [2021-11-19 05:08:54,677 INFO L78 Accepts]: Start accepts. Automaton has 9705 states and 10859 transitions. Word has length 147 [2021-11-19 05:08:54,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:08:54,677 INFO L470 AbstractCegarLoop]: Abstraction has 9705 states and 10859 transitions. [2021-11-19 05:08:54,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 4.371794871794871) internal successors, (341), 75 states have internal predecessors, (341), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:08:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 9705 states and 10859 transitions. [2021-11-19 05:08:54,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-19 05:08:54,683 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:08:54,683 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 10, 10, 10, 10, 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] [2021-11-19 05:08:54,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-19 05:08:54,883 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-19 05:08:54,884 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:08:54,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:08:54,884 INFO L85 PathProgramCache]: Analyzing trace with hash 358555994, now seen corresponding path program 10 times [2021-11-19 05:08:54,884 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:08:54,884 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339734216] [2021-11-19 05:08:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:08:54,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:08:54,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:55,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:08:55,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:08:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 120 proven. 474 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:08:55,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:08:55,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339734216] [2021-11-19 05:08:55,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339734216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:08:55,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898456315] [2021-11-19 05:08:55,440 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:08:55,440 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:08:55,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:08:55,441 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:08:55,442 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-19 05:08:55,566 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:08:55,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:08:55,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-19 05:08:55,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:08:55,604 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:08:55,605 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:08:56,073 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 [2021-11-19 05:08:57,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:08:57,352 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 19 treesize of output 19 [2021-11-19 05:08:57,645 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 162 proven. 432 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:08:57,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:08:59,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 05:08:59,567 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 39 treesize of output 35 [2021-11-19 05:09:02,058 INFO L134 CoverageAnalysis]: Checked inductivity of 608 backedges. 190 proven. 404 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-19 05:09:02,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898456315] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:09:02,058 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:09:02,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 31, 31] total 78 [2021-11-19 05:09:02,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079695774] [2021-11-19 05:09:02,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:09:02,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-19 05:09:02,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:02,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-19 05:09:02,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=5569, Unknown=0, NotChecked=0, Total=6162 [2021-11-19 05:09:02,060 INFO L87 Difference]: Start difference. First operand 9705 states and 10859 transitions. Second operand has 79 states, 75 states have (on average 4.733333333333333) internal successors, (355), 75 states have internal predecessors, (355), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:09:10,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:09:10,463 INFO L93 Difference]: Finished difference Result 12672 states and 13843 transitions. [2021-11-19 05:09:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-19 05:09:10,464 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 75 states have (on average 4.733333333333333) internal successors, (355), 75 states have internal predecessors, (355), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2021-11-19 05:09:10,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:09:10,473 INFO L225 Difference]: With dead ends: 12672 [2021-11-19 05:09:10,473 INFO L226 Difference]: Without dead ends: 11887 [2021-11-19 05:09:10,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 385 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2021, Invalid=17439, Unknown=0, NotChecked=0, Total=19460 [2021-11-19 05:09:10,475 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 1480 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 6759 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1480 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 7309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 6759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 436 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:09:10,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1480 Valid, 244 Invalid, 7309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 6759 Invalid, 0 Unknown, 436 Unchecked, 3.9s Time] [2021-11-19 05:09:10,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11887 states. [2021-11-19 05:09:10,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11887 to 8561. [2021-11-19 05:09:10,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8561 states, 8530 states have (on average 1.1160609613130128) internal successors, (9520), 8531 states have internal predecessors, (9520), 28 states have call successors, (28), 28 states have call predecessors, (28), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:09:10,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8561 states to 8561 states and 9549 transitions. [2021-11-19 05:09:10,575 INFO L78 Accepts]: Start accepts. Automaton has 8561 states and 9549 transitions. Word has length 148 [2021-11-19 05:09:10,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:09:10,576 INFO L470 AbstractCegarLoop]: Abstraction has 8561 states and 9549 transitions. [2021-11-19 05:09:10,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 75 states have (on average 4.733333333333333) internal successors, (355), 75 states have internal predecessors, (355), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:09:10,576 INFO L276 IsEmpty]: Start isEmpty. Operand 8561 states and 9549 transitions. [2021-11-19 05:09:10,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-19 05:09:10,581 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:09:10,581 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:10,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-19 05:09:10,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:09:10,782 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:09:10,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:10,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1191833047, now seen corresponding path program 18 times [2021-11-19 05:09:10,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:10,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300534117] [2021-11-19 05:09:10,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:10,782 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:11,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:09:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:11,433 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 49 proven. 708 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:09:11,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:11,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300534117] [2021-11-19 05:09:11,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300534117] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:09:11,434 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101064721] [2021-11-19 05:09:11,434 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:09:11,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:09:11,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:09:11,435 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:09:11,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-19 05:09:11,989 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-11-19 05:09:11,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:09:11,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-19 05:09:11,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:09:12,027 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:09:12,027 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:09:12,975 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 [2021-11-19 05:09:15,358 INFO L354 Elim1Store]: treesize reduction 3, result has 76.9 percent of original size [2021-11-19 05:09:15,359 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 29 treesize of output 26 [2021-11-19 05:09:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 231 proven. 526 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:09:15,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:09:18,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2021-11-19 05:09:18,432 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 35 treesize of output 33 [2021-11-19 05:09:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 276 proven. 481 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:09:21,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101064721] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:09:21,159 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:09:21,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 107 [2021-11-19 05:09:21,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248503049] [2021-11-19 05:09:21,160 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:09:21,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-19 05:09:21,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:21,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-19 05:09:21,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=806, Invalid=10536, Unknown=0, NotChecked=0, Total=11342 [2021-11-19 05:09:21,161 INFO L87 Difference]: Start difference. First operand 8561 states and 9549 transitions. Second operand has 107 states, 104 states have (on average 4.153846153846154) internal successors, (432), 103 states have internal predecessors, (432), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:09:40,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:09:40,493 INFO L93 Difference]: Finished difference Result 10016 states and 11135 transitions. [2021-11-19 05:09:40,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-11-19 05:09:40,494 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 104 states have (on average 4.153846153846154) internal successors, (432), 103 states have internal predecessors, (432), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2021-11-19 05:09:40,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:09:40,501 INFO L225 Difference]: With dead ends: 10016 [2021-11-19 05:09:40,501 INFO L226 Difference]: Without dead ends: 9915 [2021-11-19 05:09:40,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 243 SyntacticMatches, 7 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25404 ImplicationChecksByTransitivity, 22.4s TimeCoverageRelationStatistics Valid=6611, Invalid=72069, Unknown=0, NotChecked=0, Total=78680 [2021-11-19 05:09:40,505 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 693 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 5060 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 7548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 5060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2365 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:09:40,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [693 Valid, 441 Invalid, 7548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 5060 Invalid, 0 Unknown, 2365 Unchecked, 2.3s Time] [2021-11-19 05:09:40,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9915 states. [2021-11-19 05:09:40,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9915 to 9169. [2021-11-19 05:09:40,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9169 states, 9132 states have (on average 1.1176084099868593) internal successors, (10206), 9133 states have internal predecessors, (10206), 34 states have call successors, (34), 34 states have call predecessors, (34), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:09:40,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9169 states to 9169 states and 10241 transitions. [2021-11-19 05:09:40,621 INFO L78 Accepts]: Start accepts. Automaton has 9169 states and 10241 transitions. Word has length 151 [2021-11-19 05:09:40,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:09:40,622 INFO L470 AbstractCegarLoop]: Abstraction has 9169 states and 10241 transitions. [2021-11-19 05:09:40,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 104 states have (on average 4.153846153846154) internal successors, (432), 103 states have internal predecessors, (432), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:09:40,622 INFO L276 IsEmpty]: Start isEmpty. Operand 9169 states and 10241 transitions. [2021-11-19 05:09:40,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 05:09:40,628 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:09:40,628 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:09:40,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-19 05:09:40,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:09:40,829 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:09:40,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:09:40,829 INFO L85 PathProgramCache]: Analyzing trace with hash -547231988, now seen corresponding path program 11 times [2021-11-19 05:09:40,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:09:40,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862968465] [2021-11-19 05:09:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:09:40,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:09:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:41,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:09:41,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:09:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 121 proven. 303 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:09:41,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:09:41,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862968465] [2021-11-19 05:09:41,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862968465] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:09:41,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729508393] [2021-11-19 05:09:41,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:09:41,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:09:41,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:09:41,447 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:09:41,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-19 05:09:41,678 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-19 05:09:41,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:09:41,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-19 05:09:41,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:09:42,318 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 [2021-11-19 05:09:42,387 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-19 05:09:42,387 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 31 treesize of output 30 [2021-11-19 05:09:47,073 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 25 proven. 410 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-19 05:09:47,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:09:57,061 INFO L354 Elim1Store]: treesize reduction 65, result has 36.3 percent of original size [2021-11-19 05:09:57,061 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 4 case distinctions, treesize of input 722 treesize of output 515 [2021-11-19 05:09:57,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:09:57,075 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 511 treesize of output 471 [2021-11-19 05:09:57,317 INFO L354 Elim1Store]: treesize reduction 27, result has 30.8 percent of original size [2021-11-19 05:09:57,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 42 [2021-11-19 05:09:57,355 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-11-19 05:09:57,355 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 344 treesize of output 282 [2021-11-19 05:09:58,385 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 15 proven. 415 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:09:58,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729508393] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:09:58,385 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:09:58,385 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 38, 39] total 95 [2021-11-19 05:09:58,385 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134196797] [2021-11-19 05:09:58,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:09:58,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-19 05:09:58,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:09:58,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-19 05:09:58,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=8531, Unknown=1, NotChecked=0, Total=8930 [2021-11-19 05:09:58,387 INFO L87 Difference]: Start difference. First operand 9169 states and 10241 transitions. Second operand has 95 states, 93 states have (on average 4.311827956989247) internal successors, (401), 91 states have internal predecessors, (401), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:10:02,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:10:02,287 INFO L93 Difference]: Finished difference Result 10545 states and 11774 transitions. [2021-11-19 05:10:02,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-19 05:10:02,288 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 93 states have (on average 4.311827956989247) internal successors, (401), 91 states have internal predecessors, (401), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2021-11-19 05:10:02,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:10:02,295 INFO L225 Difference]: With dead ends: 10545 [2021-11-19 05:10:02,295 INFO L226 Difference]: Without dead ends: 6862 [2021-11-19 05:10:02,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 233 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3115 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=635, Invalid=14616, Unknown=1, NotChecked=0, Total=15252 [2021-11-19 05:10:02,296 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 290 mSDsluCounter, 704 mSDsCounter, 0 mSdLazyCounter, 2479 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 4611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 2479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2105 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-19 05:10:02,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 802 Invalid, 4611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 2479 Invalid, 0 Unknown, 2105 Unchecked, 1.6s Time] [2021-11-19 05:10:02,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6862 states. [2021-11-19 05:10:02,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6862 to 5948. [2021-11-19 05:10:02,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5948 states, 5919 states have (on average 1.1250211184321677) internal successors, (6659), 5920 states have internal predecessors, (6659), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:10:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5948 states to 5948 states and 6686 transitions. [2021-11-19 05:10:02,354 INFO L78 Accepts]: Start accepts. Automaton has 5948 states and 6686 transitions. Word has length 152 [2021-11-19 05:10:02,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:10:02,355 INFO L470 AbstractCegarLoop]: Abstraction has 5948 states and 6686 transitions. [2021-11-19 05:10:02,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 93 states have (on average 4.311827956989247) internal successors, (401), 91 states have internal predecessors, (401), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:10:02,355 INFO L276 IsEmpty]: Start isEmpty. Operand 5948 states and 6686 transitions. [2021-11-19 05:10:02,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 05:10:02,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:10:02,358 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:02,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-19 05:10:02,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:10:02,559 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:10:02,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:02,559 INFO L85 PathProgramCache]: Analyzing trace with hash 635033588, now seen corresponding path program 12 times [2021-11-19 05:10:02,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:02,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220906773] [2021-11-19 05:10:02,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:02,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:03,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:10:03,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 13 proven. 411 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:10:03,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:03,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220906773] [2021-11-19 05:10:03,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220906773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:10:03,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100399900] [2021-11-19 05:10:03,363 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-19 05:10:03,363 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:10:03,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:10:03,364 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:10:03,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-19 05:10:03,572 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-19 05:10:03,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:10:03,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 132 conjunts are in the unsatisfiable core [2021-11-19 05:10:03,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:10:03,637 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:10:04,234 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 21 treesize of output 17 [2021-11-19 05:10:04,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 30 [2021-11-19 05:10:10,866 INFO L354 Elim1Store]: treesize reduction 267, result has 2.9 percent of original size [2021-11-19 05:10:10,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 93 treesize of output 43 [2021-11-19 05:10:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 13 proven. 411 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:10:10,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:10:18,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:10:18,528 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 252 treesize of output 234 [2021-11-19 05:10:18,586 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 101 treesize of output 93 [2021-11-19 05:10:18,731 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:10:18,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:10:18,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:10:18,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:10:18,735 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:10:18,737 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:10:18,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:10:18,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 419 treesize of output 379 [2021-11-19 05:10:20,527 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 156 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:10:20,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100399900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:10:20,528 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:10:20,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 41, 40] total 100 [2021-11-19 05:10:20,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842167172] [2021-11-19 05:10:20,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:10:20,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-19 05:10:20,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:20,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-19 05:10:20,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=9264, Unknown=0, NotChecked=0, Total=9900 [2021-11-19 05:10:20,532 INFO L87 Difference]: Start difference. First operand 5948 states and 6686 transitions. Second operand has 100 states, 99 states have (on average 3.6565656565656566) internal successors, (362), 96 states have internal predecessors, (362), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:10:25,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:10:25,916 INFO L93 Difference]: Finished difference Result 6656 states and 7447 transitions. [2021-11-19 05:10:25,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-19 05:10:25,916 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 3.6565656565656566) internal successors, (362), 96 states have internal predecessors, (362), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2021-11-19 05:10:25,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:10:25,921 INFO L225 Difference]: With dead ends: 6656 [2021-11-19 05:10:25,921 INFO L226 Difference]: Without dead ends: 6652 [2021-11-19 05:10:25,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 237 SyntacticMatches, 2 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5046 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=1250, Invalid=21702, Unknown=0, NotChecked=0, Total=22952 [2021-11-19 05:10:25,922 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 293 mSDsluCounter, 696 mSDsCounter, 0 mSdLazyCounter, 3059 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 480 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-19 05:10:25,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 753 Invalid, 3566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3059 Invalid, 0 Unknown, 480 Unchecked, 1.5s Time] [2021-11-19 05:10:25,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6652 states. [2021-11-19 05:10:25,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6652 to 6224. [2021-11-19 05:10:25,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6224 states, 6195 states have (on average 1.1236481033091203) internal successors, (6961), 6196 states have internal predecessors, (6961), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:10:25,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6224 states to 6224 states and 6988 transitions. [2021-11-19 05:10:25,982 INFO L78 Accepts]: Start accepts. Automaton has 6224 states and 6988 transitions. Word has length 152 [2021-11-19 05:10:25,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:10:25,982 INFO L470 AbstractCegarLoop]: Abstraction has 6224 states and 6988 transitions. [2021-11-19 05:10:25,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 3.6565656565656566) internal successors, (362), 96 states have internal predecessors, (362), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:10:25,982 INFO L276 IsEmpty]: Start isEmpty. Operand 6224 states and 6988 transitions. [2021-11-19 05:10:25,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-19 05:10:25,986 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:10:25,986 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:26,010 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-19 05:10:26,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-11-19 05:10:26,187 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:10:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:26,187 INFO L85 PathProgramCache]: Analyzing trace with hash -994541836, now seen corresponding path program 13 times [2021-11-19 05:10:26,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:26,187 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489956906] [2021-11-19 05:10:26,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:26,188 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:26,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:26,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:10:26,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:26,922 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 13 proven. 411 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:10:26,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:26,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489956906] [2021-11-19 05:10:26,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489956906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:10:26,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413535111] [2021-11-19 05:10:26,923 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:10:26,923 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:10:26,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:10:26,924 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:10:26,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-19 05:10:27,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:27,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 555 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-19 05:10:27,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:10:27,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:10:27,569 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 21 treesize of output 17 [2021-11-19 05:10:27,639 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-19 05:10:27,639 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 35 treesize of output 34 [2021-11-19 05:10:29,884 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-19 05:10:29,885 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 38 treesize of output 23 [2021-11-19 05:10:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 85 proven. 339 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:10:29,945 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:10:42,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:10:42,428 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 26 treesize of output 22 [2021-11-19 05:10:43,065 INFO L134 CoverageAnalysis]: Checked inductivity of 442 backedges. 85 proven. 339 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:10:43,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413535111] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:10:43,066 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:10:43,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 22, 21] total 68 [2021-11-19 05:10:43,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456796843] [2021-11-19 05:10:43,066 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:10:43,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-19 05:10:43,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:10:43,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-19 05:10:43,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4362, Unknown=0, NotChecked=0, Total=4556 [2021-11-19 05:10:43,068 INFO L87 Difference]: Start difference. First operand 6224 states and 6988 transitions. Second operand has 68 states, 67 states have (on average 5.641791044776119) internal successors, (378), 64 states have internal predecessors, (378), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:10:47,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:10:47,354 INFO L93 Difference]: Finished difference Result 6765 states and 7580 transitions. [2021-11-19 05:10:47,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-19 05:10:47,355 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 5.641791044776119) internal successors, (378), 64 states have internal predecessors, (378), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2021-11-19 05:10:47,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:10:47,361 INFO L225 Difference]: With dead ends: 6765 [2021-11-19 05:10:47,361 INFO L226 Difference]: Without dead ends: 6751 [2021-11-19 05:10:47,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 268 SyntacticMatches, 4 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1684 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=498, Invalid=10844, Unknown=0, NotChecked=0, Total=11342 [2021-11-19 05:10:47,362 INFO L933 BasicCegarLoop]: 120 mSDtfsCounter, 301 mSDsluCounter, 738 mSDsCounter, 0 mSdLazyCounter, 4254 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 858 SdHoareTripleChecker+Invalid, 7318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 4254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3038 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-19 05:10:47,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 858 Invalid, 7318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 4254 Invalid, 0 Unknown, 3038 Unchecked, 1.9s Time] [2021-11-19 05:10:47,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6751 states. [2021-11-19 05:10:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6751 to 6160. [2021-11-19 05:10:47,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6160 states, 6131 states have (on average 1.1233077801337465) internal successors, (6887), 6132 states have internal predecessors, (6887), 26 states have call successors, (26), 26 states have call predecessors, (26), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:10:47,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6160 states to 6160 states and 6914 transitions. [2021-11-19 05:10:47,429 INFO L78 Accepts]: Start accepts. Automaton has 6160 states and 6914 transitions. Word has length 152 [2021-11-19 05:10:47,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:10:47,429 INFO L470 AbstractCegarLoop]: Abstraction has 6160 states and 6914 transitions. [2021-11-19 05:10:47,429 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 5.641791044776119) internal successors, (378), 64 states have internal predecessors, (378), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:10:47,429 INFO L276 IsEmpty]: Start isEmpty. Operand 6160 states and 6914 transitions. [2021-11-19 05:10:47,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2021-11-19 05:10:47,433 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:10:47,433 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:10:47,457 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-19 05:10:47,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-19 05:10:47,634 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:10:47,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:10:47,634 INFO L85 PathProgramCache]: Analyzing trace with hash 672219504, now seen corresponding path program 14 times [2021-11-19 05:10:47,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:10:47,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111080672] [2021-11-19 05:10:47,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:10:47,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:10:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:48,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:10:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:10:48,592 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 15 proven. 448 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:10:48,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:10:48,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111080672] [2021-11-19 05:10:48,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111080672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:10:48,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680043646] [2021-11-19 05:10:48,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:10:48,593 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:10:48,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:10:48,594 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:10:48,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-19 05:10:48,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:10:48,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:10:48,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-19 05:10:48,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:10:48,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:10:49,415 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 21 treesize of output 17 [2021-11-19 05:10:49,492 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-19 05:10:49,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 34 [2021-11-19 05:10:51,973 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-19 05:10:51,973 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 38 treesize of output 23 [2021-11-19 05:10:52,040 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 85 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:10:52,041 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:11:05,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:11:05,866 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 26 treesize of output 22 [2021-11-19 05:11:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 85 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:11:06,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680043646] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:11:06,657 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:11:06,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 24, 23] total 74 [2021-11-19 05:11:06,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931355816] [2021-11-19 05:11:06,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:11:06,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-19 05:11:06,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:06,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-19 05:11:06,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=5198, Unknown=0, NotChecked=0, Total=5402 [2021-11-19 05:11:06,659 INFO L87 Difference]: Start difference. First operand 6160 states and 6914 transitions. Second operand has 74 states, 73 states have (on average 5.794520547945205) internal successors, (423), 70 states have internal predecessors, (423), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:11:11,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:11:11,513 INFO L93 Difference]: Finished difference Result 10052 states and 11286 transitions. [2021-11-19 05:11:11,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-19 05:11:11,513 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 5.794520547945205) internal successors, (423), 70 states have internal predecessors, (423), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 153 [2021-11-19 05:11:11,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:11:11,520 INFO L225 Difference]: With dead ends: 10052 [2021-11-19 05:11:11,520 INFO L226 Difference]: Without dead ends: 7800 [2021-11-19 05:11:11,521 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 266 SyntacticMatches, 2 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1449 ImplicationChecksByTransitivity, 18.6s TimeCoverageRelationStatistics Valid=469, Invalid=11521, Unknown=0, NotChecked=0, Total=11990 [2021-11-19 05:11:11,521 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 256 mSDsluCounter, 1553 mSDsCounter, 0 mSdLazyCounter, 5386 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1680 SdHoareTripleChecker+Invalid, 8778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 5386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3364 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:11:11,522 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [256 Valid, 1680 Invalid, 8778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 5386 Invalid, 0 Unknown, 3364 Unchecked, 2.4s Time] [2021-11-19 05:11:11,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7800 states. [2021-11-19 05:11:11,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7800 to 6952. [2021-11-19 05:11:11,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6952 states, 6912 states have (on average 1.122974537037037) internal successors, (7762), 6913 states have internal predecessors, (7762), 37 states have call successors, (37), 37 states have call predecessors, (37), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:11:11,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6952 states to 6952 states and 7800 transitions. [2021-11-19 05:11:11,638 INFO L78 Accepts]: Start accepts. Automaton has 6952 states and 7800 transitions. Word has length 153 [2021-11-19 05:11:11,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:11:11,638 INFO L470 AbstractCegarLoop]: Abstraction has 6952 states and 7800 transitions. [2021-11-19 05:11:11,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 5.794520547945205) internal successors, (423), 70 states have internal predecessors, (423), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:11:11,639 INFO L276 IsEmpty]: Start isEmpty. Operand 6952 states and 7800 transitions. [2021-11-19 05:11:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 05:11:11,648 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:11:11,648 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:11,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-19 05:11:11,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-19 05:11:11,871 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:11:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:11,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1019201267, now seen corresponding path program 15 times [2021-11-19 05:11:11,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:11,872 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225977497] [2021-11-19 05:11:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:11,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:12,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:11:12,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:12,410 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 66 proven. 426 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:11:12,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:12,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225977497] [2021-11-19 05:11:12,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225977497] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:11:12,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524816593] [2021-11-19 05:11:12,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:11:12,411 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:11:12,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:11:12,412 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:11:12,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-19 05:11:12,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-19 05:11:12,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:11:12,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 05:11:12,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:11:12,719 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-19 05:11:12,720 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 1 case distinctions, treesize of input 18 treesize of output 19 [2021-11-19 05:11:12,723 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 15 treesize of output 13 [2021-11-19 05:11:14,110 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 91 proven. 401 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:11:14,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:11:15,762 INFO L134 CoverageAnalysis]: Checked inductivity of 493 backedges. 120 proven. 372 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:11:15,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524816593] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:11:15,763 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:11:15,763 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 62 [2021-11-19 05:11:15,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553450189] [2021-11-19 05:11:15,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:11:15,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-19 05:11:15,764 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:15,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-19 05:11:15,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=426, Invalid=3480, Unknown=0, NotChecked=0, Total=3906 [2021-11-19 05:11:15,765 INFO L87 Difference]: Start difference. First operand 6952 states and 7800 transitions. Second operand has 63 states, 62 states have (on average 7.258064516129032) internal successors, (450), 59 states have internal predecessors, (450), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:11:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:11:18,670 INFO L93 Difference]: Finished difference Result 11470 states and 12910 transitions. [2021-11-19 05:11:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-19 05:11:18,670 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 62 states have (on average 7.258064516129032) internal successors, (450), 59 states have internal predecessors, (450), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2021-11-19 05:11:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:11:18,679 INFO L225 Difference]: With dead ends: 11470 [2021-11-19 05:11:18,679 INFO L226 Difference]: Without dead ends: 11470 [2021-11-19 05:11:18,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 275 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=985, Invalid=7025, Unknown=0, NotChecked=0, Total=8010 [2021-11-19 05:11:18,679 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 963 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 3715 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 963 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 3772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-19 05:11:18,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [963 Valid, 222 Invalid, 3772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3715 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-19 05:11:18,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11470 states. [2021-11-19 05:11:18,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11470 to 7473. [2021-11-19 05:11:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7473 states, 7433 states have (on average 1.1233687609309835) internal successors, (8350), 7434 states have internal predecessors, (8350), 37 states have call successors, (37), 37 states have call predecessors, (37), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:11:18,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7473 states to 7473 states and 8388 transitions. [2021-11-19 05:11:18,790 INFO L78 Accepts]: Start accepts. Automaton has 7473 states and 8388 transitions. Word has length 157 [2021-11-19 05:11:18,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:11:18,791 INFO L470 AbstractCegarLoop]: Abstraction has 7473 states and 8388 transitions. [2021-11-19 05:11:18,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 62 states have (on average 7.258064516129032) internal successors, (450), 59 states have internal predecessors, (450), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:11:18,791 INFO L276 IsEmpty]: Start isEmpty. Operand 7473 states and 8388 transitions. [2021-11-19 05:11:18,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-19 05:11:18,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:11:18,797 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:18,823 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-19 05:11:18,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-19 05:11:18,998 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:11:18,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:18,998 INFO L85 PathProgramCache]: Analyzing trace with hash -197504064, now seen corresponding path program 14 times [2021-11-19 05:11:18,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:18,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691989331] [2021-11-19 05:11:18,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:18,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:19,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:11:19,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:19,584 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 133 proven. 339 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 05:11:19,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:19,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691989331] [2021-11-19 05:11:19,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691989331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:11:19,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716758367] [2021-11-19 05:11:19,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-19 05:11:19,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:11:19,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:11:19,587 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:11:19,611 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-19 05:11:19,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-19 05:11:19,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:11:19,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 575 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-19 05:11:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:11:19,814 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:11:19,815 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:11:20,796 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 33 treesize of output 29 [2021-11-19 05:11:20,803 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-19 05:11:20,804 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 29 treesize of output 29 [2021-11-19 05:11:20,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 33 [2021-11-19 05:11:26,610 INFO L354 Elim1Store]: treesize reduction 125, result has 6.0 percent of original size [2021-11-19 05:11:26,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 73 treesize of output 43 [2021-11-19 05:11:26,685 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 13 proven. 477 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:11:26,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:11:29,334 INFO L354 Elim1Store]: treesize reduction 70, result has 31.4 percent of original size [2021-11-19 05:11:29,335 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 4 case distinctions, treesize of input 435 treesize of output 360 [2021-11-19 05:11:29,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-19 05:11:29,346 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 290 treesize of output 274 [2021-11-19 05:11:29,386 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 248 treesize of output 224 [2021-11-19 05:11:29,449 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 208 treesize of output 188 [2021-11-19 05:11:29,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:11:29,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-19 05:11:29,735 INFO L354 Elim1Store]: treesize reduction 15, result has 70.6 percent of original size [2021-11-19 05:11:29,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 118 treesize of output 112 [2021-11-19 05:11:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 32 proven. 458 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-19 05:11:37,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1716758367] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:11:37,755 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:11:37,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 37, 37] total 92 [2021-11-19 05:11:37,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120063267] [2021-11-19 05:11:37,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:11:37,756 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-19 05:11:37,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:11:37,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-19 05:11:37,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=7929, Unknown=0, NotChecked=0, Total=8372 [2021-11-19 05:11:37,757 INFO L87 Difference]: Start difference. First operand 7473 states and 8388 transitions. Second operand has 92 states, 90 states have (on average 4.666666666666667) internal successors, (420), 88 states have internal predecessors, (420), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:11:43,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:11:43,099 INFO L93 Difference]: Finished difference Result 8137 states and 9112 transitions. [2021-11-19 05:11:43,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-19 05:11:43,099 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 90 states have (on average 4.666666666666667) internal successors, (420), 88 states have internal predecessors, (420), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2021-11-19 05:11:43,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:11:43,105 INFO L225 Difference]: With dead ends: 8137 [2021-11-19 05:11:43,105 INFO L226 Difference]: Without dead ends: 7651 [2021-11-19 05:11:43,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 256 SyntacticMatches, 1 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3691 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=1007, Invalid=17899, Unknown=0, NotChecked=0, Total=18906 [2021-11-19 05:11:43,107 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 329 mSDsluCounter, 2226 mSDsCounter, 0 mSdLazyCounter, 3920 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 2369 SdHoareTripleChecker+Invalid, 7158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 3920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3211 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-19 05:11:43,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 2369 Invalid, 7158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 3920 Invalid, 0 Unknown, 3211 Unchecked, 2.0s Time] [2021-11-19 05:11:43,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7651 states. [2021-11-19 05:11:43,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7651 to 7078. [2021-11-19 05:11:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7078 states, 7039 states have (on average 1.1260122176445517) internal successors, (7926), 7040 states have internal predecessors, (7926), 36 states have call successors, (36), 36 states have call predecessors, (36), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:11:43,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7078 states to 7078 states and 7963 transitions. [2021-11-19 05:11:43,186 INFO L78 Accepts]: Start accepts. Automaton has 7078 states and 7963 transitions. Word has length 158 [2021-11-19 05:11:43,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:11:43,186 INFO L470 AbstractCegarLoop]: Abstraction has 7078 states and 7963 transitions. [2021-11-19 05:11:43,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 90 states have (on average 4.666666666666667) internal successors, (420), 88 states have internal predecessors, (420), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:11:43,187 INFO L276 IsEmpty]: Start isEmpty. Operand 7078 states and 7963 transitions. [2021-11-19 05:11:43,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-19 05:11:43,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:11:43,193 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:11:43,220 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-19 05:11:43,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-19 05:11:43,395 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:11:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:11:43,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1153178177, now seen corresponding path program 15 times [2021-11-19 05:11:43,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:11:43,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551466547] [2021-11-19 05:11:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:11:43,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:11:43,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:44,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:11:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:11:44,445 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:11:44,445 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:11:44,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551466547] [2021-11-19 05:11:44,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551466547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:11:44,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84333192] [2021-11-19 05:11:44,446 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-19 05:11:44,446 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:11:44,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:11:44,446 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:11:44,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-19 05:11:44,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-19 05:11:44,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:11:44,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-19 05:11:44,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:11:44,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:11:45,352 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 21 treesize of output 17 [2021-11-19 05:11:45,441 INFO L354 Elim1Store]: treesize reduction 40, result has 20.0 percent of original size [2021-11-19 05:11:45,441 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 35 treesize of output 34 [2021-11-19 05:11:49,422 INFO L354 Elim1Store]: treesize reduction 61, result has 29.9 percent of original size [2021-11-19 05:11:49,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 53 treesize of output 52 [2021-11-19 05:11:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:11:49,487 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:01,873 WARN L838 $PredicateComparison]: unable to prove that (forall ((main_~nondetString2~0.offset Int) (cstrpbrk_~s~0.offset Int) (cstrpbrk_~s~0.base Int) (main_~length2~0 Int)) (let ((.cse1 (store |c_#memory_int| c_main_~nondetString2~0.base (store (select |c_#memory_int| c_main_~nondetString2~0.base) (+ (- 1) main_~nondetString2~0.offset main_~length2~0) 0)))) (let ((.cse0 (select (select .cse1 cstrpbrk_~s~0.base) cstrpbrk_~s~0.offset))) (or (= .cse0 0) (not (= .cse0 (select (select .cse1 c_main_~nondetString1~0.base) (+ 7 c_main_~nondetString1~0.offset)))))))) is different from false [2021-11-19 05:12:01,884 INFO L354 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2021-11-19 05:12:01,885 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 404 treesize of output 360 [2021-11-19 05:12:02,915 INFO L134 CoverageAnalysis]: Checked inductivity of 517 backedges. 15 proven. 490 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 05:12:02,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84333192] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:02,916 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:02,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 29] total 85 [2021-11-19 05:12:02,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917279145] [2021-11-19 05:12:02,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:02,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-19 05:12:02,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:02,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-19 05:12:02,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=6721, Unknown=11, NotChecked=164, Total=7140 [2021-11-19 05:12:02,918 INFO L87 Difference]: Start difference. First operand 7078 states and 7963 transitions. Second operand has 85 states, 83 states have (on average 5.204819277108434) internal successors, (432), 81 states have internal predecessors, (432), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:12:39,959 WARN L227 SmtUtils]: Spent 33.56s on a formula simplification. DAG size of input: 42 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-19 05:12:43,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:43,313 INFO L93 Difference]: Finished difference Result 8381 states and 9374 transitions. [2021-11-19 05:12:43,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-19 05:12:43,313 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 83 states have (on average 5.204819277108434) internal successors, (432), 81 states have internal predecessors, (432), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2021-11-19 05:12:43,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:43,320 INFO L225 Difference]: With dead ends: 8381 [2021-11-19 05:12:43,320 INFO L226 Difference]: Without dead ends: 8363 [2021-11-19 05:12:43,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 276 SyntacticMatches, 4 SemanticMatches, 122 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 2090 ImplicationChecksByTransitivity, 53.9s TimeCoverageRelationStatistics Valid=522, Invalid=14475, Unknown=13, NotChecked=242, Total=15252 [2021-11-19 05:12:43,322 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 209 mSDsluCounter, 1584 mSDsCounter, 0 mSdLazyCounter, 3017 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 1661 SdHoareTripleChecker+Invalid, 4694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 3017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1656 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:43,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 1661 Invalid, 4694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 3017 Invalid, 0 Unknown, 1656 Unchecked, 1.4s Time] [2021-11-19 05:12:43,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8363 states. [2021-11-19 05:12:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8363 to 8294. [2021-11-19 05:12:43,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8294 states, 8255 states have (on average 1.1201695941853422) internal successors, (9247), 8256 states have internal predecessors, (9247), 36 states have call successors, (36), 36 states have call predecessors, (36), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:12:43,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8294 states to 8294 states and 9284 transitions. [2021-11-19 05:12:43,411 INFO L78 Accepts]: Start accepts. Automaton has 8294 states and 9284 transitions. Word has length 163 [2021-11-19 05:12:43,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:43,411 INFO L470 AbstractCegarLoop]: Abstraction has 8294 states and 9284 transitions. [2021-11-19 05:12:43,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 83 states have (on average 5.204819277108434) internal successors, (432), 81 states have internal predecessors, (432), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:12:43,412 INFO L276 IsEmpty]: Start isEmpty. Operand 8294 states and 9284 transitions. [2021-11-19 05:12:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-19 05:12:43,420 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:43,420 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:12:43,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:43,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-19 05:12:43,621 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:12:43,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:43,621 INFO L85 PathProgramCache]: Analyzing trace with hash -535660268, now seen corresponding path program 19 times [2021-11-19 05:12:43,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:43,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975375906] [2021-11-19 05:12:43,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:43,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:44,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:12:44,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:44,407 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 566 proven. 404 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:12:44,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:44,407 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975375906] [2021-11-19 05:12:44,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975375906] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:44,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79030725] [2021-11-19 05:12:44,408 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-19 05:12:44,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:44,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:44,411 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:44,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-19 05:12:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:44,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 571 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-19 05:12:44,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:44,633 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-11-19 05:12:44,633 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 1 case distinctions, treesize of input 9 treesize of output 15 [2021-11-19 05:12:46,284 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 645 proven. 325 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:12:46,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:47,597 INFO L134 CoverageAnalysis]: Checked inductivity of 971 backedges. 631 proven. 339 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-19 05:12:47,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79030725] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:47,597 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:47,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 87 [2021-11-19 05:12:47,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192615546] [2021-11-19 05:12:47,598 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:47,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-19 05:12:47,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:47,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-19 05:12:47,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1232, Invalid=6250, Unknown=0, NotChecked=0, Total=7482 [2021-11-19 05:12:47,601 INFO L87 Difference]: Start difference. First operand 8294 states and 9284 transitions. Second operand has 87 states, 86 states have (on average 4.441860465116279) internal successors, (382), 84 states have internal predecessors, (382), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:12:50,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:50,199 INFO L93 Difference]: Finished difference Result 14316 states and 15658 transitions. [2021-11-19 05:12:50,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 05:12:50,200 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 86 states have (on average 4.441860465116279) internal successors, (382), 84 states have internal predecessors, (382), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2021-11-19 05:12:50,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:50,214 INFO L225 Difference]: With dead ends: 14316 [2021-11-19 05:12:50,214 INFO L226 Difference]: Without dead ends: 14216 [2021-11-19 05:12:50,216 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 285 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6706 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2988, Invalid=14834, Unknown=0, NotChecked=0, Total=17822 [2021-11-19 05:12:50,216 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 753 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 2445 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 753 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 2445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:50,216 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [753 Valid, 154 Invalid, 2556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 2445 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-19 05:12:50,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14216 states. [2021-11-19 05:12:50,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14216 to 9842. [2021-11-19 05:12:50,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9842 states, 9796 states have (on average 1.1242343813801552) internal successors, (11013), 9797 states have internal predecessors, (11013), 43 states have call successors, (43), 43 states have call predecessors, (43), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:12:50,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9842 states to 9842 states and 11057 transitions. [2021-11-19 05:12:50,357 INFO L78 Accepts]: Start accepts. Automaton has 9842 states and 11057 transitions. Word has length 167 [2021-11-19 05:12:50,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:50,357 INFO L470 AbstractCegarLoop]: Abstraction has 9842 states and 11057 transitions. [2021-11-19 05:12:50,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 86 states have (on average 4.441860465116279) internal successors, (382), 84 states have internal predecessors, (382), 3 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:12:50,357 INFO L276 IsEmpty]: Start isEmpty. Operand 9842 states and 11057 transitions. [2021-11-19 05:12:50,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-19 05:12:50,367 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:12:50,367 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 12, 12, 12, 12, 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] [2021-11-19 05:12:50,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-19 05:12:50,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-19 05:12:50,578 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting cstrpbrkErr5REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:12:50,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:12:50,578 INFO L85 PathProgramCache]: Analyzing trace with hash 708520676, now seen corresponding path program 11 times [2021-11-19 05:12:50,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:12:50,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319042694] [2021-11-19 05:12:50,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:12:50,579 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:12:50,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:51,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:12:51,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:12:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 53 proven. 785 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:12:51,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:12:51,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319042694] [2021-11-19 05:12:51,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319042694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:12:51,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145659993] [2021-11-19 05:12:51,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-19 05:12:51,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:12:51,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:12:51,338 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:12:51,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-19 05:12:51,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-19 05:12:51,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:12:51,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-19 05:12:51,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:12:52,309 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 [2021-11-19 05:12:52,935 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 [2021-11-19 05:12:52,946 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 53 proven. 785 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:12:52,946 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 05:12:53,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2021-11-19 05:12:53,329 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 26 treesize of output 22 [2021-11-19 05:12:53,625 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 53 proven. 785 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-19 05:12:53,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1145659993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-19 05:12:53,626 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-19 05:12:53,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 35, 35] total 62 [2021-11-19 05:12:53,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80712547] [2021-11-19 05:12:53,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-19 05:12:53,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-19 05:12:53,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-19 05:12:53,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-19 05:12:53,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3600, Unknown=0, NotChecked=0, Total=3782 [2021-11-19 05:12:53,627 INFO L87 Difference]: Start difference. First operand 9842 states and 11057 transitions. Second operand has 62 states, 59 states have (on average 4.576271186440678) internal successors, (270), 58 states have internal predecessors, (270), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:12:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 05:12:59,857 INFO L93 Difference]: Finished difference Result 13645 states and 15264 transitions. [2021-11-19 05:12:59,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-19 05:12:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 59 states have (on average 4.576271186440678) internal successors, (270), 58 states have internal predecessors, (270), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2021-11-19 05:12:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 05:12:59,868 INFO L225 Difference]: With dead ends: 13645 [2021-11-19 05:12:59,868 INFO L226 Difference]: Without dead ends: 13524 [2021-11-19 05:12:59,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 421 GetRequests, 311 SyntacticMatches, 3 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=600, Invalid=11172, Unknown=0, NotChecked=0, Total=11772 [2021-11-19 05:12:59,869 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 454 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 9996 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 454 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 10589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 9996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 531 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-19 05:12:59,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [454 Valid, 819 Invalid, 10589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 9996 Invalid, 0 Unknown, 531 Unchecked, 4.4s Time] [2021-11-19 05:12:59,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13524 states. [2021-11-19 05:12:59,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13524 to 10605. [2021-11-19 05:12:59,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10605 states, 10559 states have (on average 1.1252012501183823) internal successors, (11881), 10560 states have internal predecessors, (11881), 43 states have call successors, (43), 43 states have call predecessors, (43), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:12:59,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10605 states to 10605 states and 11925 transitions. [2021-11-19 05:12:59,998 INFO L78 Accepts]: Start accepts. Automaton has 10605 states and 11925 transitions. Word has length 168 [2021-11-19 05:12:59,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 05:12:59,999 INFO L470 AbstractCegarLoop]: Abstraction has 10605 states and 11925 transitions. [2021-11-19 05:12:59,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 59 states have (on average 4.576271186440678) internal successors, (270), 58 states have internal predecessors, (270), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-19 05:12:59,999 INFO L276 IsEmpty]: Start isEmpty. Operand 10605 states and 11925 transitions. [2021-11-19 05:13:00,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-19 05:13:00,008 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 05:13:00,009 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 05:13:00,036 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-19 05:13:00,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:13:00,209 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting cstrpbrkErr1REQUIRES_VIOLATION === [cstrpbrkErr0REQUIRES_VIOLATION, cstrpbrkErr1REQUIRES_VIOLATION, cstrpbrkErr2REQUIRES_VIOLATION, cstrpbrkErr3REQUIRES_VIOLATION (and 15 more)] === [2021-11-19 05:13:00,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 05:13:00,210 INFO L85 PathProgramCache]: Analyzing trace with hash -172516021, now seen corresponding path program 16 times [2021-11-19 05:13:00,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-19 05:13:00,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339725587] [2021-11-19 05:13:00,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 05:13:00,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 05:13:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:00,736 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-19 05:13:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 05:13:00,739 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 139 proven. 414 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:13:00,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-19 05:13:00,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339725587] [2021-11-19 05:13:00,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339725587] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 05:13:00,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112512978] [2021-11-19 05:13:00,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-19 05:13:00,740 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 05:13:00,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 [2021-11-19 05:13:00,741 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 05:13:00,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c33dfbfc-4e01-4cdc-8a4e-baced5f1172e/bin/uautomizer-ZXIjhQolGL/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-19 05:13:00,894 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-19 05:13:00,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-19 05:13:00,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 568 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-19 05:13:00,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 05:13:00,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2021-11-19 05:13:00,923 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 9 treesize of output 11 [2021-11-19 05:13:01,853 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 16 treesize of output 12 [2021-11-19 05:13:01,934 INFO L354 Elim1Store]: treesize reduction 50, result has 19.4 percent of original size [2021-11-19 05:13:01,934 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 33 treesize of output 32 [2021-11-19 05:13:04,882 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-19 05:13:04,882 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 56 treesize of output 48 [2021-11-19 05:13:04,892 INFO L354 Elim1Store]: treesize reduction 42, result has 6.7 percent of original size [2021-11-19 05:13:04,892 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 48 treesize of output 33 [2021-11-19 05:13:04,923 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 455 proven. 98 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 05:13:04,923 INFO L328 TraceCheckSpWp]: Computing backward predicates...