./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext-properties/test-0513_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version f8e1c903 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext-properties/test-0513_1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX --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 2cd9310cc22b48510db29915dc2047c5968d5424a204e513aea9283dac5ac7bf --- Real Ultimate output --- This is Ultimate 0.2.1-dev-f8e1c90 [2021-11-09 10:46:01,985 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-09 10:46:01,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-09 10:46:02,020 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-09 10:46:02,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-09 10:46:02,022 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-09 10:46:02,024 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-09 10:46:02,026 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-09 10:46:02,028 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-09 10:46:02,030 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-09 10:46:02,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-09 10:46:02,033 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-09 10:46:02,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-09 10:46:02,035 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-09 10:46:02,037 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-09 10:46:02,038 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-09 10:46:02,040 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-09 10:46:02,041 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-09 10:46:02,044 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-09 10:46:02,046 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-09 10:46:02,048 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-09 10:46:02,050 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-09 10:46:02,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-09 10:46:02,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-09 10:46:02,057 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-09 10:46:02,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-09 10:46:02,058 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-09 10:46:02,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-09 10:46:02,060 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-09 10:46:02,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-09 10:46:02,062 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-09 10:46:02,063 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-09 10:46:02,064 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-09 10:46:02,065 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-09 10:46:02,067 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-09 10:46:02,067 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-09 10:46:02,068 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-09 10:46:02,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-09 10:46:02,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-09 10:46:02,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-09 10:46:02,071 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-09 10:46:02,074 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-11-09 10:46:02,120 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-09 10:46:02,120 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-09 10:46:02,121 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-09 10:46:02,121 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-09 10:46:02,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-09 10:46:02,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-09 10:46:02,123 INFO L138 SettingsManager]: * Use SBE=true [2021-11-09 10:46:02,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-09 10:46:02,124 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-09 10:46:02,124 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-09 10:46:02,125 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-09 10:46:02,125 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-09 10:46:02,126 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-09 10:46:02,126 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-09 10:46:02,126 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-09 10:46:02,126 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-09 10:46:02,126 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-09 10:46:02,127 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-09 10:46:02,127 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-09 10:46:02,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-09 10:46:02,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-09 10:46:02,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-09 10:46:02,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-09 10:46:02,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:46:02,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-09 10:46:02,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-09 10:46:02,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-09 10:46:02,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-09 10:46:02,130 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-09 10:46:02,130 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_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cd9310cc22b48510db29915dc2047c5968d5424a204e513aea9283dac5ac7bf [2021-11-09 10:46:02,398 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-09 10:46:02,427 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-09 10:46:02,430 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-09 10:46:02,432 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-09 10:46:02,433 INFO L275 PluginConnector]: CDTParser initialized [2021-11-09 10:46:02,434 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/../../sv-benchmarks/c/list-ext-properties/test-0513_1.i [2021-11-09 10:46:02,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/data/00fe516f1/0b2204a4e0b64a56afd47ded52d7f758/FLAG0c346b12a [2021-11-09 10:46:03,068 INFO L306 CDTParser]: Found 1 translation units. [2021-11-09 10:46:03,077 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/sv-benchmarks/c/list-ext-properties/test-0513_1.i [2021-11-09 10:46:03,092 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/data/00fe516f1/0b2204a4e0b64a56afd47ded52d7f758/FLAG0c346b12a [2021-11-09 10:46:03,392 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/data/00fe516f1/0b2204a4e0b64a56afd47ded52d7f758 [2021-11-09 10:46:03,394 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-09 10:46:03,396 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-11-09 10:46:03,398 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-09 10:46:03,398 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-09 10:46:03,406 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-09 10:46:03,406 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:46:03" (1/1) ... [2021-11-09 10:46:03,408 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ec4db7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03, skipping insertion in model container [2021-11-09 10:46:03,409 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:46:03" (1/1) ... [2021-11-09 10:46:03,416 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-09 10:46:03,481 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-09 10:46:03,873 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:46:03,883 INFO L203 MainTranslator]: Completed pre-run [2021-11-09 10:46:03,948 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-09 10:46:03,977 INFO L208 MainTranslator]: Completed translation [2021-11-09 10:46:03,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03 WrapperNode [2021-11-09 10:46:03,978 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-09 10:46:03,979 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-09 10:46:03,979 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-09 10:46:03,979 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-09 10:46:03,991 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03" (1/1) ... [2021-11-09 10:46:03,991 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03" (1/1) ... [2021-11-09 10:46:04,009 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03" (1/1) ... [2021-11-09 10:46:04,009 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03" (1/1) ... [2021-11-09 10:46:04,036 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03" (1/1) ... [2021-11-09 10:46:04,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03" (1/1) ... [2021-11-09 10:46:04,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03" (1/1) ... [2021-11-09 10:46:04,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-09 10:46:04,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-09 10:46:04,056 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-09 10:46:04,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-09 10:46:04,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03" (1/1) ... [2021-11-09 10:46:04,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-09 10:46:04,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:04,090 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-09 10:46:04,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-09 10:46:04,127 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-11-09 10:46:04,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-09 10:46:04,128 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-11-09 10:46:04,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2021-11-09 10:46:04,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2021-11-09 10:46:04,128 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint16_identity [2021-11-09 10:46:04,129 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint32_identity [2021-11-09 10:46:04,129 INFO L138 BoogieDeclarations]: Found implementation of procedure __uint64_identity [2021-11-09 10:46:04,129 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-11-09 10:46:04,129 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-11-09 10:46:04,129 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-11-09 10:46:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2021-11-09 10:46:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2021-11-09 10:46:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-11-09 10:46:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-09 10:46:04,130 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2021-11-09 10:46:04,131 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2021-11-09 10:46:04,131 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2021-11-09 10:46:04,131 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2021-11-09 10:46:04,131 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2021-11-09 10:46:04,131 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2021-11-09 10:46:04,131 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2021-11-09 10:46:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2021-11-09 10:46:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2021-11-09 10:46:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2021-11-09 10:46:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2021-11-09 10:46:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2021-11-09 10:46:04,132 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2021-11-09 10:46:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2021-11-09 10:46:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2021-11-09 10:46:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2021-11-09 10:46:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2021-11-09 10:46:04,133 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2021-11-09 10:46:04,134 INFO L130 BoogieDeclarations]: Found specification of procedure __uint16_identity [2021-11-09 10:46:04,134 INFO L130 BoogieDeclarations]: Found specification of procedure __uint32_identity [2021-11-09 10:46:04,134 INFO L130 BoogieDeclarations]: Found specification of procedure __uint64_identity [2021-11-09 10:46:04,134 INFO L130 BoogieDeclarations]: Found specification of procedure select [2021-11-09 10:46:04,134 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2021-11-09 10:46:04,134 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2021-11-09 10:46:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2021-11-09 10:46:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2021-11-09 10:46:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure random [2021-11-09 10:46:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2021-11-09 10:46:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2021-11-09 10:46:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2021-11-09 10:46:04,135 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2021-11-09 10:46:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2021-11-09 10:46:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2021-11-09 10:46:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2021-11-09 10:46:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2021-11-09 10:46:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2021-11-09 10:46:04,136 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2021-11-09 10:46:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2021-11-09 10:46:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2021-11-09 10:46:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2021-11-09 10:46:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2021-11-09 10:46:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2021-11-09 10:46:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2021-11-09 10:46:04,137 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2021-11-09 10:46:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2021-11-09 10:46:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2021-11-09 10:46:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2021-11-09 10:46:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2021-11-09 10:46:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2021-11-09 10:46:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2021-11-09 10:46:04,138 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2021-11-09 10:46:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2021-11-09 10:46:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2021-11-09 10:46:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2021-11-09 10:46:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2021-11-09 10:46:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2021-11-09 10:46:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2021-11-09 10:46:04,139 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2021-11-09 10:46:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure free [2021-11-09 10:46:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2021-11-09 10:46:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2021-11-09 10:46:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2021-11-09 10:46:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2021-11-09 10:46:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2021-11-09 10:46:04,140 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2021-11-09 10:46:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2021-11-09 10:46:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2021-11-09 10:46:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2021-11-09 10:46:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2021-11-09 10:46:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2021-11-09 10:46:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2021-11-09 10:46:04,141 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2021-11-09 10:46:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2021-11-09 10:46:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2021-11-09 10:46:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2021-11-09 10:46:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2021-11-09 10:46:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2021-11-09 10:46:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2021-11-09 10:46:04,142 INFO L130 BoogieDeclarations]: Found specification of procedure system [2021-11-09 10:46:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2021-11-09 10:46:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2021-11-09 10:46:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2021-11-09 10:46:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2021-11-09 10:46:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2021-11-09 10:46:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2021-11-09 10:46:04,143 INFO L130 BoogieDeclarations]: Found specification of procedure div [2021-11-09 10:46:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2021-11-09 10:46:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2021-11-09 10:46:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2021-11-09 10:46:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2021-11-09 10:46:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2021-11-09 10:46:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2021-11-09 10:46:04,144 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2021-11-09 10:46:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2021-11-09 10:46:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2021-11-09 10:46:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2021-11-09 10:46:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2021-11-09 10:46:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2021-11-09 10:46:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2021-11-09 10:46:04,145 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2021-11-09 10:46:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2021-11-09 10:46:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2021-11-09 10:46:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2021-11-09 10:46:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2021-11-09 10:46:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2021-11-09 10:46:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2021-11-09 10:46:04,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-11-09 10:46:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-11-09 10:46:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-09 10:46:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-09 10:46:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-09 10:46:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-09 10:46:04,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-09 10:46:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-09 10:46:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-11-09 10:46:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-09 10:46:04,148 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-09 10:46:05,048 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-09 10:46:05,048 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-11-09 10:46:05,051 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:46:05 BoogieIcfgContainer [2021-11-09 10:46:05,051 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-09 10:46:05,053 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-09 10:46:05,053 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-09 10:46:05,057 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-09 10:46:05,057 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:46:03" (1/3) ... [2021-11-09 10:46:05,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6440cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:46:05, skipping insertion in model container [2021-11-09 10:46:05,058 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:46:03" (2/3) ... [2021-11-09 10:46:05,058 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6440cb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:46:05, skipping insertion in model container [2021-11-09 10:46:05,059 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:46:05" (3/3) ... [2021-11-09 10:46:05,060 INFO L111 eAbstractionObserver]: Analyzing ICFG test-0513_1.i [2021-11-09 10:46:05,066 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-09 10:46:05,066 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 70 error locations. [2021-11-09 10:46:05,108 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-09 10:46:05,114 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 [2021-11-09 10:46:05,114 INFO L340 AbstractCegarLoop]: Starting to check reachability of 70 error locations. [2021-11-09 10:46:05,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 156 states, 81 states have (on average 2.111111111111111) internal successors, (171), 151 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-09 10:46:05,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-09 10:46:05,143 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:05,143 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:05,144 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr69ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:05,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:05,150 INFO L85 PathProgramCache]: Analyzing trace with hash -218697500, now seen corresponding path program 1 times [2021-11-09 10:46:05,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:05,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670807921] [2021-11-09 10:46:05,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:05,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:05,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:05,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:05,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:05,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:05,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670807921] [2021-11-09 10:46:05,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670807921] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:05,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:05,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:05,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164131135] [2021-11-09 10:46:05,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-09 10:46:05,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:05,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-09 10:46:05,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:05,394 INFO L87 Difference]: Start difference. First operand has 156 states, 81 states have (on average 2.111111111111111) internal successors, (171), 151 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-09 10:46:05,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:05,843 INFO L93 Difference]: Finished difference Result 204 states and 222 transitions. [2021-11-09 10:46:05,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-09 10:46:05,845 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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 9 [2021-11-09 10:46:05,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:05,861 INFO L225 Difference]: With dead ends: 204 [2021-11-09 10:46:05,861 INFO L226 Difference]: Without dead ends: 199 [2021-11-09 10:46:05,863 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-09 10:46:05,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-11-09 10:46:05,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 157. [2021-11-09 10:46:05,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 84 states have (on average 2.0238095238095237) internal successors, (170), 153 states have internal predecessors, (170), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:05,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 173 transitions. [2021-11-09 10:46:05,936 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 173 transitions. Word has length 9 [2021-11-09 10:46:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:05,937 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 173 transitions. [2021-11-09 10:46:05,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-11-09 10:46:05,937 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 173 transitions. [2021-11-09 10:46:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:46:05,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:05,938 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:05,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-09 10:46:05,939 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:05,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:05,940 INFO L85 PathProgramCache]: Analyzing trace with hash 214303425, now seen corresponding path program 1 times [2021-11-09 10:46:05,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:05,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314890136] [2021-11-09 10:46:05,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:05,941 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:06,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:06,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:06,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:06,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314890136] [2021-11-09 10:46:06,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314890136] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:06,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:06,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:06,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749974018] [2021-11-09 10:46:06,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:06,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:06,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:06,104 INFO L87 Difference]: Start difference. First operand 157 states and 173 transitions. Second operand has 4 states, 4 states have (on average 2.0) 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) [2021-11-09 10:46:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:06,459 INFO L93 Difference]: Finished difference Result 177 states and 194 transitions. [2021-11-09 10:46:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:46:06,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) 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 [2021-11-09 10:46:06,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:06,466 INFO L225 Difference]: With dead ends: 177 [2021-11-09 10:46:06,466 INFO L226 Difference]: Without dead ends: 176 [2021-11-09 10:46:06,467 INFO L786 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 [2021-11-09 10:46:06,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-09 10:46:06,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 166. [2021-11-09 10:46:06,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 93 states have (on average 2.032258064516129) internal successors, (189), 162 states have internal predecessors, (189), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 192 transitions. [2021-11-09 10:46:06,486 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 192 transitions. Word has length 11 [2021-11-09 10:46:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:06,486 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 192 transitions. [2021-11-09 10:46:06,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) 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) [2021-11-09 10:46:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 192 transitions. [2021-11-09 10:46:06,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:46:06,487 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:06,487 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:06,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-09 10:46:06,487 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:06,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:06,488 INFO L85 PathProgramCache]: Analyzing trace with hash 214303328, now seen corresponding path program 1 times [2021-11-09 10:46:06,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:06,488 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488839157] [2021-11-09 10:46:06,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:06,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:06,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:06,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:06,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:06,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:06,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488839157] [2021-11-09 10:46:06,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488839157] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:06,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:06,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:06,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925926193] [2021-11-09 10:46:06,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:06,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:06,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:06,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:06,562 INFO L87 Difference]: Start difference. First operand 166 states and 192 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) [2021-11-09 10:46:06,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:06,918 INFO L93 Difference]: Finished difference Result 195 states and 221 transitions. [2021-11-09 10:46:06,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:06,919 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 [2021-11-09 10:46:06,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:06,921 INFO L225 Difference]: With dead ends: 195 [2021-11-09 10:46:06,921 INFO L226 Difference]: Without dead ends: 195 [2021-11-09 10:46:06,922 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:06,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-09 10:46:06,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 165. [2021-11-09 10:46:06,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 97 states have (on average 1.9381443298969072) internal successors, (188), 161 states have internal predecessors, (188), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:06,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 191 transitions. [2021-11-09 10:46:06,933 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 191 transitions. Word has length 11 [2021-11-09 10:46:06,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:06,933 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 191 transitions. [2021-11-09 10:46:06,934 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) [2021-11-09 10:46:06,934 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 191 transitions. [2021-11-09 10:46:06,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-09 10:46:06,935 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:06,935 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:06,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-09 10:46:06,935 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr1REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:06,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:06,936 INFO L85 PathProgramCache]: Analyzing trace with hash 214303329, now seen corresponding path program 1 times [2021-11-09 10:46:06,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:06,936 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207191281] [2021-11-09 10:46:06,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:06,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:06,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:07,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:07,016 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:07,016 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207191281] [2021-11-09 10:46:07,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207191281] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:07,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:07,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:07,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128835877] [2021-11-09 10:46:07,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:07,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:07,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:07,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:07,019 INFO L87 Difference]: Start difference. First operand 165 states and 191 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) [2021-11-09 10:46:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:07,281 INFO L93 Difference]: Finished difference Result 161 states and 183 transitions. [2021-11-09 10:46:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:07,282 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 [2021-11-09 10:46:07,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:07,283 INFO L225 Difference]: With dead ends: 161 [2021-11-09 10:46:07,284 INFO L226 Difference]: Without dead ends: 161 [2021-11-09 10:46:07,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:07,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-11-09 10:46:07,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2021-11-09 10:46:07,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 97 states have (on average 1.8556701030927836) internal successors, (180), 157 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:07,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 183 transitions. [2021-11-09 10:46:07,299 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 183 transitions. Word has length 11 [2021-11-09 10:46:07,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:07,299 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 183 transitions. [2021-11-09 10:46:07,300 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) [2021-11-09 10:46:07,300 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 183 transitions. [2021-11-09 10:46:07,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-09 10:46:07,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:07,306 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:07,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-09 10:46:07,307 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:07,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:07,307 INFO L85 PathProgramCache]: Analyzing trace with hash -1554554164, now seen corresponding path program 1 times [2021-11-09 10:46:07,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:07,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44795391] [2021-11-09 10:46:07,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:07,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:07,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:07,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:07,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44795391] [2021-11-09 10:46:07,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44795391] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:07,397 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:07,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:07,397 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330005317] [2021-11-09 10:46:07,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:46:07,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:07,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:46:07,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:07,399 INFO L87 Difference]: Start difference. First operand 161 states and 183 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-09 10:46:07,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:07,715 INFO L93 Difference]: Finished difference Result 299 states and 333 transitions. [2021-11-09 10:46:07,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:46:07,716 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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 17 [2021-11-09 10:46:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:07,719 INFO L225 Difference]: With dead ends: 299 [2021-11-09 10:46:07,719 INFO L226 Difference]: Without dead ends: 299 [2021-11-09 10:46:07,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:07,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2021-11-09 10:46:07,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 164. [2021-11-09 10:46:07,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 100 states have (on average 1.8) internal successors, (180), 160 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:07,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 183 transitions. [2021-11-09 10:46:07,736 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 183 transitions. Word has length 17 [2021-11-09 10:46:07,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:07,737 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 183 transitions. [2021-11-09 10:46:07,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 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) [2021-11-09 10:46:07,737 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 183 transitions. [2021-11-09 10:46:07,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:46:07,738 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:07,738 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:07,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-09 10:46:07,739 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr14REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:07,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:07,740 INFO L85 PathProgramCache]: Analyzing trace with hash 184371332, now seen corresponding path program 1 times [2021-11-09 10:46:07,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:07,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070187179] [2021-11-09 10:46:07,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:07,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:07,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:07,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:07,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:07,836 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070187179] [2021-11-09 10:46:07,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070187179] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:07,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:07,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:07,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364563637] [2021-11-09 10:46:07,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:07,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:07,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:07,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:07,839 INFO L87 Difference]: Start difference. First operand 164 states and 183 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:08,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:08,083 INFO L93 Difference]: Finished difference Result 160 states and 179 transitions. [2021-11-09 10:46:08,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:08,084 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-09 10:46:08,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:08,085 INFO L225 Difference]: With dead ends: 160 [2021-11-09 10:46:08,085 INFO L226 Difference]: Without dead ends: 160 [2021-11-09 10:46:08,086 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-09 10:46:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2021-11-09 10:46:08,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 100 states have (on average 1.76) internal successors, (176), 156 states have internal predecessors, (176), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:08,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 179 transitions. [2021-11-09 10:46:08,092 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 179 transitions. Word has length 20 [2021-11-09 10:46:08,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:08,092 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 179 transitions. [2021-11-09 10:46:08,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:08,092 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 179 transitions. [2021-11-09 10:46:08,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-09 10:46:08,093 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:08,093 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:08,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-09 10:46:08,094 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr15REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:08,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:08,094 INFO L85 PathProgramCache]: Analyzing trace with hash 184371333, now seen corresponding path program 1 times [2021-11-09 10:46:08,094 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:08,095 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649078714] [2021-11-09 10:46:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:08,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:08,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:08,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:08,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:08,161 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649078714] [2021-11-09 10:46:08,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649078714] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:08,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:08,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-09 10:46:08,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497716246] [2021-11-09 10:46:08,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:08,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:08,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:08,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:08,163 INFO L87 Difference]: Start difference. First operand 160 states and 179 transitions. Second operand has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:08,411 INFO L93 Difference]: Finished difference Result 157 states and 176 transitions. [2021-11-09 10:46:08,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-09 10:46:08,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-11-09 10:46:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:08,413 INFO L225 Difference]: With dead ends: 157 [2021-11-09 10:46:08,413 INFO L226 Difference]: Without dead ends: 157 [2021-11-09 10:46:08,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-09 10:46:08,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-11-09 10:46:08,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2021-11-09 10:46:08,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 100 states have (on average 1.73) internal successors, (173), 153 states have internal predecessors, (173), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:08,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 176 transitions. [2021-11-09 10:46:08,418 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 176 transitions. Word has length 20 [2021-11-09 10:46:08,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:08,419 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 176 transitions. [2021-11-09 10:46:08,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:08,419 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 176 transitions. [2021-11-09 10:46:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:46:08,420 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:08,420 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:08,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-09 10:46:08,420 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr69ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:08,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:08,421 INFO L85 PathProgramCache]: Analyzing trace with hash 736988264, now seen corresponding path program 1 times [2021-11-09 10:46:08,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:08,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196051769] [2021-11-09 10:46:08,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:08,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:08,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:08,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:08,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:08,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:08,498 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:08,499 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196051769] [2021-11-09 10:46:08,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196051769] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:08,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:08,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:08,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795799777] [2021-11-09 10:46:08,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:46:08,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:08,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:46:08,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:08,501 INFO L87 Difference]: Start difference. First operand 157 states and 176 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:08,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:08,784 INFO L93 Difference]: Finished difference Result 265 states and 294 transitions. [2021-11-09 10:46:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:08,784 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-09 10:46:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:08,786 INFO L225 Difference]: With dead ends: 265 [2021-11-09 10:46:08,786 INFO L226 Difference]: Without dead ends: 265 [2021-11-09 10:46:08,786 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-09 10:46:08,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 157. [2021-11-09 10:46:08,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 100 states have (on average 1.71) internal successors, (171), 153 states have internal predecessors, (171), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:08,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 174 transitions. [2021-11-09 10:46:08,791 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 174 transitions. Word has length 28 [2021-11-09 10:46:08,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:08,792 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 174 transitions. [2021-11-09 10:46:08,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:08,792 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 174 transitions. [2021-11-09 10:46:08,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:46:08,793 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:08,793 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:08,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-09 10:46:08,794 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:08,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:08,794 INFO L85 PathProgramCache]: Analyzing trace with hash 736988137, now seen corresponding path program 1 times [2021-11-09 10:46:08,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:08,795 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880418046] [2021-11-09 10:46:08,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:08,795 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:08,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:08,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:08,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:08,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:08,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880418046] [2021-11-09 10:46:08,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880418046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:08,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:08,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:08,904 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622495804] [2021-11-09 10:46:08,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:08,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:08,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:08,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:08,907 INFO L87 Difference]: Start difference. First operand 157 states and 174 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:09,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:09,264 INFO L93 Difference]: Finished difference Result 151 states and 168 transitions. [2021-11-09 10:46:09,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:09,265 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-09 10:46:09,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:09,266 INFO L225 Difference]: With dead ends: 151 [2021-11-09 10:46:09,266 INFO L226 Difference]: Without dead ends: 151 [2021-11-09 10:46:09,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:09,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-09 10:46:09,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-11-09 10:46:09,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 101 states have (on average 1.6336633663366336) internal successors, (165), 146 states have internal predecessors, (165), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:09,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 168 transitions. [2021-11-09 10:46:09,272 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 168 transitions. Word has length 28 [2021-11-09 10:46:09,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:09,273 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 168 transitions. [2021-11-09 10:46:09,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:09,273 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 168 transitions. [2021-11-09 10:46:09,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-09 10:46:09,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:09,274 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:09,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-09 10:46:09,274 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:09,275 INFO L85 PathProgramCache]: Analyzing trace with hash 736988138, now seen corresponding path program 1 times [2021-11-09 10:46:09,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:09,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974461994] [2021-11-09 10:46:09,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:09,275 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:09,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:09,395 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:09,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:09,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974461994] [2021-11-09 10:46:09,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974461994] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:09,396 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:09,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:09,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047066586] [2021-11-09 10:46:09,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:46:09,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:09,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:46:09,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:09,398 INFO L87 Difference]: Start difference. First operand 150 states and 168 transitions. Second operand has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:09,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:09,769 INFO L93 Difference]: Finished difference Result 241 states and 269 transitions. [2021-11-09 10:46:09,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:09,770 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-11-09 10:46:09,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:09,772 INFO L225 Difference]: With dead ends: 241 [2021-11-09 10:46:09,772 INFO L226 Difference]: Without dead ends: 241 [2021-11-09 10:46:09,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:09,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-09 10:46:09,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 189. [2021-11-09 10:46:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 142 states have (on average 1.6619718309859155) internal successors, (236), 185 states have internal predecessors, (236), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:09,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 239 transitions. [2021-11-09 10:46:09,779 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 239 transitions. Word has length 28 [2021-11-09 10:46:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:09,780 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 239 transitions. [2021-11-09 10:46:09,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 6.25) internal successors, (25), 4 states have internal predecessors, (25), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 239 transitions. [2021-11-09 10:46:09,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 10:46:09,781 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:09,782 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:09,782 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-09 10:46:09,782 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr58ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:09,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:09,783 INFO L85 PathProgramCache]: Analyzing trace with hash 68673321, now seen corresponding path program 1 times [2021-11-09 10:46:09,783 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:09,783 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633991793] [2021-11-09 10:46:09,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:09,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:09,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:09,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:09,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:09,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633991793] [2021-11-09 10:46:09,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633991793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:09,880 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:09,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-09 10:46:09,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849451609] [2021-11-09 10:46:09,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:09,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:09,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:09,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:09,882 INFO L87 Difference]: Start difference. First operand 189 states and 239 transitions. Second operand has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-11-09 10:46:10,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:10,274 INFO L93 Difference]: Finished difference Result 242 states and 270 transitions. [2021-11-09 10:46:10,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:46:10,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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 33 [2021-11-09 10:46:10,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:10,277 INFO L225 Difference]: With dead ends: 242 [2021-11-09 10:46:10,277 INFO L226 Difference]: Without dead ends: 242 [2021-11-09 10:46:10,277 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:10,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-09 10:46:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 190. [2021-11-09 10:46:10,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 143 states have (on average 1.6573426573426573) internal successors, (237), 186 states have internal predecessors, (237), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:10,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 240 transitions. [2021-11-09 10:46:10,284 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 240 transitions. Word has length 33 [2021-11-09 10:46:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:10,285 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 240 transitions. [2021-11-09 10:46:10,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 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) [2021-11-09 10:46:10,285 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 240 transitions. [2021-11-09 10:46:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 10:46:10,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:10,286 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:10,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-09 10:46:10,286 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:10,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:10,287 INFO L85 PathProgramCache]: Analyzing trace with hash 67534286, now seen corresponding path program 1 times [2021-11-09 10:46:10,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:10,287 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918437063] [2021-11-09 10:46:10,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:10,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:10,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:10,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:10,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:10,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:10,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918437063] [2021-11-09 10:46:10,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918437063] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:10,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:10,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:46:10,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67142717] [2021-11-09 10:46:10,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:46:10,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:10,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:46:10,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:46:10,405 INFO L87 Difference]: Start difference. First operand 190 states and 240 transitions. Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-11-09 10:46:10,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:10,844 INFO L93 Difference]: Finished difference Result 241 states and 296 transitions. [2021-11-09 10:46:10,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-09 10:46:10,845 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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 33 [2021-11-09 10:46:10,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:10,847 INFO L225 Difference]: With dead ends: 241 [2021-11-09 10:46:10,847 INFO L226 Difference]: Without dead ends: 241 [2021-11-09 10:46:10,847 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:46:10,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-09 10:46:10,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 202. [2021-11-09 10:46:10,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 155 states have (on average 1.632258064516129) internal successors, (253), 198 states have internal predecessors, (253), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 256 transitions. [2021-11-09 10:46:10,855 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 256 transitions. Word has length 33 [2021-11-09 10:46:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:10,855 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 256 transitions. [2021-11-09 10:46:10,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 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) [2021-11-09 10:46:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 256 transitions. [2021-11-09 10:46:10,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-09 10:46:10,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:10,858 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:10,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-09 10:46:10,858 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:10,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:10,859 INFO L85 PathProgramCache]: Analyzing trace with hash 67534287, now seen corresponding path program 1 times [2021-11-09 10:46:10,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:10,859 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699210207] [2021-11-09 10:46:10,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:10,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:10,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:10,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:10,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:10,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:10,982 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699210207] [2021-11-09 10:46:10,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699210207] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:10,982 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:10,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:46:10,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964851229] [2021-11-09 10:46:10,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:46:10,983 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:10,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:46:10,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:10,985 INFO L87 Difference]: Start difference. First operand 202 states and 256 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-11-09 10:46:11,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:11,431 INFO L93 Difference]: Finished difference Result 229 states and 283 transitions. [2021-11-09 10:46:11,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-09 10:46:11,431 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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 33 [2021-11-09 10:46:11,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:11,433 INFO L225 Difference]: With dead ends: 229 [2021-11-09 10:46:11,434 INFO L226 Difference]: Without dead ends: 229 [2021-11-09 10:46:11,434 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:46:11,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-09 10:46:11,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 198. [2021-11-09 10:46:11,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 151 states have (on average 1.6357615894039734) internal successors, (247), 194 states have internal predecessors, (247), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 250 transitions. [2021-11-09 10:46:11,443 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 250 transitions. Word has length 33 [2021-11-09 10:46:11,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:11,443 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 250 transitions. [2021-11-09 10:46:11,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 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) [2021-11-09 10:46:11,444 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 250 transitions. [2021-11-09 10:46:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 10:46:11,445 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:11,445 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:11,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-09 10:46:11,445 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:11,446 INFO L85 PathProgramCache]: Analyzing trace with hash 1442719570, now seen corresponding path program 1 times [2021-11-09 10:46:11,446 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:11,447 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669346319] [2021-11-09 10:46:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:11,447 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:11,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:11,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:11,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:11,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:11,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669346319] [2021-11-09 10:46:11,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669346319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:11,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:11,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-09 10:46:11,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803121268] [2021-11-09 10:46:11,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-09 10:46:11,726 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:11,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-09 10:46:11,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-09 10:46:11,727 INFO L87 Difference]: Start difference. First operand 198 states and 250 transitions. Second operand has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:12,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:12,536 INFO L93 Difference]: Finished difference Result 311 states and 378 transitions. [2021-11-09 10:46:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:46:12,537 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-11-09 10:46:12,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:12,540 INFO L225 Difference]: With dead ends: 311 [2021-11-09 10:46:12,540 INFO L226 Difference]: Without dead ends: 311 [2021-11-09 10:46:12,541 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2021-11-09 10:46:12,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-11-09 10:46:12,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 224. [2021-11-09 10:46:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 177 states have (on average 1.5875706214689265) internal successors, (281), 220 states have internal predecessors, (281), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:12,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 284 transitions. [2021-11-09 10:46:12,551 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 284 transitions. Word has length 36 [2021-11-09 10:46:12,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:12,551 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 284 transitions. [2021-11-09 10:46:12,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 284 transitions. [2021-11-09 10:46:12,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-09 10:46:12,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:12,553 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:12,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-09 10:46:12,553 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr61REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:12,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:12,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1442719571, now seen corresponding path program 1 times [2021-11-09 10:46:12,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:12,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792996195] [2021-11-09 10:46:12,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:12,555 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:12,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:12,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:12,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792996195] [2021-11-09 10:46:12,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792996195] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:12,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:12,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-09 10:46:12,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231617612] [2021-11-09 10:46:12,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:46:12,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:12,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:46:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:12,925 INFO L87 Difference]: Start difference. First operand 224 states and 284 transitions. Second operand has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:13,557 INFO L93 Difference]: Finished difference Result 313 states and 378 transitions. [2021-11-09 10:46:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:46:13,558 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-11-09 10:46:13,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:13,560 INFO L225 Difference]: With dead ends: 313 [2021-11-09 10:46:13,561 INFO L226 Difference]: Without dead ends: 313 [2021-11-09 10:46:13,564 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:46:13,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-11-09 10:46:13,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 224. [2021-11-09 10:46:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 177 states have (on average 1.5819209039548023) internal successors, (280), 220 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:13,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 283 transitions. [2021-11-09 10:46:13,574 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 283 transitions. Word has length 36 [2021-11-09 10:46:13,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:13,574 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 283 transitions. [2021-11-09 10:46:13,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.125) internal successors, (33), 8 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:13,575 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 283 transitions. [2021-11-09 10:46:13,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-09 10:46:13,579 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:13,579 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:13,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-09 10:46:13,580 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr69ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:13,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:13,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1774633043, now seen corresponding path program 1 times [2021-11-09 10:46:13,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:13,581 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185422328] [2021-11-09 10:46:13,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:13,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:13,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:13,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:13,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:13,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:13,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185422328] [2021-11-09 10:46:13,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185422328] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:13,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:13,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 10:46:13,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082035323] [2021-11-09 10:46:13,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:46:13,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:13,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:46:13,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:46:13,820 INFO L87 Difference]: Start difference. First operand 224 states and 283 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:14,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:14,234 INFO L93 Difference]: Finished difference Result 258 states and 319 transitions. [2021-11-09 10:46:14,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-09 10:46:14,235 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2021-11-09 10:46:14,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:14,237 INFO L225 Difference]: With dead ends: 258 [2021-11-09 10:46:14,237 INFO L226 Difference]: Without dead ends: 258 [2021-11-09 10:46:14,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:46:14,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-09 10:46:14,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 230. [2021-11-09 10:46:14,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 183 states have (on average 1.5628415300546448) internal successors, (286), 226 states have internal predecessors, (286), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:14,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 289 transitions. [2021-11-09 10:46:14,246 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 289 transitions. Word has length 37 [2021-11-09 10:46:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:14,247 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 289 transitions. [2021-11-09 10:46:14,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:14,247 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 289 transitions. [2021-11-09 10:46:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:46:14,248 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:14,248 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:14,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-09 10:46:14,249 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr62REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:14,249 INFO L85 PathProgramCache]: Analyzing trace with hash -820923405, now seen corresponding path program 1 times [2021-11-09 10:46:14,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:14,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122240822] [2021-11-09 10:46:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:14,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:14,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:14,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:14,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:14,314 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-09 10:46:14,314 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:14,314 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122240822] [2021-11-09 10:46:14,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122240822] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:14,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:14,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-09 10:46:14,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591117020] [2021-11-09 10:46:14,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:46:14,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:14,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:46:14,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-09 10:46:14,316 INFO L87 Difference]: Start difference. First operand 230 states and 289 transitions. Second operand has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:14,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:14,717 INFO L93 Difference]: Finished difference Result 303 states and 382 transitions. [2021-11-09 10:46:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:14,717 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-09 10:46:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:14,720 INFO L225 Difference]: With dead ends: 303 [2021-11-09 10:46:14,720 INFO L226 Difference]: Without dead ends: 303 [2021-11-09 10:46:14,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-11-09 10:46:14,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 232. [2021-11-09 10:46:14,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 189 states have (on average 1.560846560846561) internal successors, (295), 228 states have internal predecessors, (295), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:14,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 298 transitions. [2021-11-09 10:46:14,730 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 298 transitions. Word has length 38 [2021-11-09 10:46:14,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:14,730 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 298 transitions. [2021-11-09 10:46:14,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 8.25) internal successors, (33), 4 states have internal predecessors, (33), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:14,731 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 298 transitions. [2021-11-09 10:46:14,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-09 10:46:14,732 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:14,732 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:14,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-09 10:46:14,732 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr63REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:14,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:14,733 INFO L85 PathProgramCache]: Analyzing trace with hash -820923404, now seen corresponding path program 1 times [2021-11-09 10:46:14,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:14,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883084735] [2021-11-09 10:46:14,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:14,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:15,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:15,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:15,196 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:15,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:15,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883084735] [2021-11-09 10:46:15,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883084735] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:15,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:15,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-11-09 10:46:15,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235996536] [2021-11-09 10:46:15,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-09 10:46:15,197 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:15,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-09 10:46:15,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-11-09 10:46:15,198 INFO L87 Difference]: Start difference. First operand 232 states and 298 transitions. Second operand has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:16,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:16,374 INFO L93 Difference]: Finished difference Result 332 states and 406 transitions. [2021-11-09 10:46:16,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:46:16,375 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-11-09 10:46:16,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:16,377 INFO L225 Difference]: With dead ends: 332 [2021-11-09 10:46:16,377 INFO L226 Difference]: Without dead ends: 332 [2021-11-09 10:46:16,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:46:16,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2021-11-09 10:46:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 240. [2021-11-09 10:46:16,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 197 states have (on average 1.5482233502538072) internal successors, (305), 236 states have internal predecessors, (305), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 308 transitions. [2021-11-09 10:46:16,388 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 308 transitions. Word has length 38 [2021-11-09 10:46:16,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:16,388 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 308 transitions. [2021-11-09 10:46:16,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 308 transitions. [2021-11-09 10:46:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-09 10:46:16,390 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:16,390 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:16,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-09 10:46:16,390 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:16,391 INFO L85 PathProgramCache]: Analyzing trace with hash 291327655, now seen corresponding path program 1 times [2021-11-09 10:46:16,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:16,391 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359282312] [2021-11-09 10:46:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:16,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:16,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:16,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:16,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:16,995 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:16,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359282312] [2021-11-09 10:46:16,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359282312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:16,996 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579718598] [2021-11-09 10:46:16,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:16,996 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:16,996 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:17,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:17,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-09 10:46:17,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:17,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-09 10:46:17,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:17,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:46:17,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:46:17,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:46:17,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:17,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:46:17,527 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:17,529 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:46:17,585 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:17,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:46:17,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:17,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:46:17,655 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:17,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:46:17,664 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:17,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:46:17,709 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:46:17,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 10:46:17,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:46:17,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:46:18,013 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:46:18,014 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 57 [2021-11-09 10:46:18,021 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:46:18,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 58 [2021-11-09 10:46:19,159 INFO L354 Elim1Store]: treesize reduction 110, result has 6.0 percent of original size [2021-11-09 10:46:19,160 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 96 treesize of output 66 [2021-11-09 10:46:19,190 INFO L354 Elim1Store]: treesize reduction 82, result has 7.9 percent of original size [2021-11-09 10:46:19,191 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 48 treesize of output 35 [2021-11-09 10:46:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:19,330 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579718598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:19,330 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:19,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2021-11-09 10:46:19,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449556556] [2021-11-09 10:46:19,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-09 10:46:19,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:19,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-09 10:46:19,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2021-11-09 10:46:19,334 INFO L87 Difference]: Start difference. First operand 240 states and 308 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 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) [2021-11-09 10:46:23,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:23,582 INFO L93 Difference]: Finished difference Result 286 states and 357 transitions. [2021-11-09 10:46:23,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-09 10:46:23,586 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 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 43 [2021-11-09 10:46:23,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:23,589 INFO L225 Difference]: With dead ends: 286 [2021-11-09 10:46:23,589 INFO L226 Difference]: Without dead ends: 286 [2021-11-09 10:46:23,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=428, Invalid=2878, Unknown=0, NotChecked=0, Total=3306 [2021-11-09 10:46:23,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-11-09 10:46:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 252. [2021-11-09 10:46:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 209 states have (on average 1.5263157894736843) internal successors, (319), 248 states have internal predecessors, (319), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 322 transitions. [2021-11-09 10:46:23,605 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 322 transitions. Word has length 43 [2021-11-09 10:46:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:23,606 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 322 transitions. [2021-11-09 10:46:23,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 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) [2021-11-09 10:46:23,606 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 322 transitions. [2021-11-09 10:46:23,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-09 10:46:23,607 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:23,607 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:23,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:23,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:23,837 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr67ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:23,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:23,837 INFO L85 PathProgramCache]: Analyzing trace with hash 606000577, now seen corresponding path program 1 times [2021-11-09 10:46:23,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:23,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122556648] [2021-11-09 10:46:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:23,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:24,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:24,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:24,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:24,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:24,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122556648] [2021-11-09 10:46:24,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [122556648] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:24,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:24,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-09 10:46:24,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626642018] [2021-11-09 10:46:24,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:46:24,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:24,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:46:24,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:46:24,027 INFO L87 Difference]: Start difference. First operand 252 states and 322 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:24,492 INFO L93 Difference]: Finished difference Result 261 states and 329 transitions. [2021-11-09 10:46:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:46:24,493 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2021-11-09 10:46:24,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:24,498 INFO L225 Difference]: With dead ends: 261 [2021-11-09 10:46:24,498 INFO L226 Difference]: Without dead ends: 261 [2021-11-09 10:46:24,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-11-09 10:46:24,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2021-11-09 10:46:24,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 252. [2021-11-09 10:46:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 209 states have (on average 1.5215311004784688) internal successors, (318), 248 states have internal predecessors, (318), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:24,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 321 transitions. [2021-11-09 10:46:24,506 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 321 transitions. Word has length 45 [2021-11-09 10:46:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:24,507 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 321 transitions. [2021-11-09 10:46:24,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 9 states have internal predecessors, (42), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:24,507 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 321 transitions. [2021-11-09 10:46:24,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-09 10:46:24,508 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:24,508 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:24,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-09 10:46:24,509 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr69ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:24,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:24,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1606363579, now seen corresponding path program 1 times [2021-11-09 10:46:24,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:24,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28487898] [2021-11-09 10:46:24,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:24,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:25,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:25,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:25,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:25,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28487898] [2021-11-09 10:46:25,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28487898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:25,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:25,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-11-09 10:46:25,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870806169] [2021-11-09 10:46:25,209 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-09 10:46:25,209 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:25,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-09 10:46:25,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:46:25,210 INFO L87 Difference]: Start difference. First operand 252 states and 321 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:26,816 INFO L93 Difference]: Finished difference Result 298 states and 371 transitions. [2021-11-09 10:46:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-09 10:46:26,817 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-11-09 10:46:26,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:26,819 INFO L225 Difference]: With dead ends: 298 [2021-11-09 10:46:26,819 INFO L226 Difference]: Without dead ends: 298 [2021-11-09 10:46:26,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=273, Invalid=1449, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:46:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-09 10:46:26,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 252. [2021-11-09 10:46:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 209 states have (on average 1.5167464114832536) internal successors, (317), 248 states have internal predecessors, (317), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:26,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 320 transitions. [2021-11-09 10:46:26,831 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 320 transitions. Word has length 46 [2021-11-09 10:46:26,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:26,831 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 320 transitions. [2021-11-09 10:46:26,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:26,832 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 320 transitions. [2021-11-09 10:46:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 10:46:26,833 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:26,833 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:26,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-11-09 10:46:26,833 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr69ENSURES_VIOLATIONMEMORY_LEAK === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:26,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:26,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1445918649, now seen corresponding path program 1 times [2021-11-09 10:46:26,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:26,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476002515] [2021-11-09 10:46:26,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:26,835 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:27,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:27,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:27,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:27,214 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476002515] [2021-11-09 10:46:27,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476002515] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:27,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195105310] [2021-11-09 10:46:27,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:27,215 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:27,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:27,216 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:27,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-09 10:46:27,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:27,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-09 10:46:27,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:27,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 30 [2021-11-09 10:46:27,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:46:27,926 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 44 treesize of output 36 [2021-11-09 10:46:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:28,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195105310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:28,697 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:28,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 24 [2021-11-09 10:46:28,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740858274] [2021-11-09 10:46:28,698 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-09 10:46:28,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:28,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-09 10:46:28,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:46:28,700 INFO L87 Difference]: Start difference. First operand 252 states and 320 transitions. Second operand has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:30,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:30,671 INFO L93 Difference]: Finished difference Result 254 states and 321 transitions. [2021-11-09 10:46:30,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-09 10:46:30,672 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-11-09 10:46:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:30,674 INFO L225 Difference]: With dead ends: 254 [2021-11-09 10:46:30,675 INFO L226 Difference]: Without dead ends: 231 [2021-11-09 10:46:30,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:46:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-09 10:46:30,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2021-11-09 10:46:30,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 188 states have (on average 1.5691489361702127) internal successors, (295), 227 states have internal predecessors, (295), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:30,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 298 transitions. [2021-11-09 10:46:30,684 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 298 transitions. Word has length 49 [2021-11-09 10:46:30,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:30,685 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 298 transitions. [2021-11-09 10:46:30,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 3.6666666666666665) internal successors, (88), 24 states have internal predecessors, (88), 1 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:30,685 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 298 transitions. [2021-11-09 10:46:30,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 10:46:30,686 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:30,686 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1] [2021-11-09 10:46:30,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:30,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:30,908 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:30,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:30,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1258796051, now seen corresponding path program 1 times [2021-11-09 10:46:30,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:30,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524643411] [2021-11-09 10:46:30,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:30,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:30,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:30,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:30,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:30,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524643411] [2021-11-09 10:46:30,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524643411] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:30,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915994694] [2021-11-09 10:46:30,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:30,975 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:30,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:30,976 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:30,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-09 10:46:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:31,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-09 10:46:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:31,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-09 10:46:31,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915994694] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:31,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:46:31,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 7 [2021-11-09 10:46:31,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135021831] [2021-11-09 10:46:31,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-09 10:46:31,388 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:31,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-09 10:46:31,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:31,388 INFO L87 Difference]: Start difference. First operand 231 states and 298 transitions. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:31,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:31,420 INFO L93 Difference]: Finished difference Result 394 states and 508 transitions. [2021-11-09 10:46:31,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:46:31,420 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2021-11-09 10:46:31,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:31,423 INFO L225 Difference]: With dead ends: 394 [2021-11-09 10:46:31,424 INFO L226 Difference]: Without dead ends: 392 [2021-11-09 10:46:31,424 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:46:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-11-09 10:46:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 242. [2021-11-09 10:46:31,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 199 states have (on average 1.5175879396984924) internal successors, (302), 238 states have internal predecessors, (302), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 305 transitions. [2021-11-09 10:46:31,434 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 305 transitions. Word has length 49 [2021-11-09 10:46:31,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:31,435 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 305 transitions. [2021-11-09 10:46:31,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 305 transitions. [2021-11-09 10:46:31,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-09 10:46:31,436 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:31,436 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:31,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:31,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-09 10:46:31,661 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:31,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:31,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1938854421, now seen corresponding path program 1 times [2021-11-09 10:46:31,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:31,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128463378] [2021-11-09 10:46:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:31,662 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:31,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:31,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:31,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:31,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128463378] [2021-11-09 10:46:31,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128463378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:31,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963685152] [2021-11-09 10:46:31,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:31,732 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:31,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:31,733 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:31,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-09 10:46:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:32,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-09 10:46:32,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:32,257 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 10 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:32,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963685152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:32,257 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:32,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-09 10:46:32,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113454202] [2021-11-09 10:46:32,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-09 10:46:32,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:32,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-09 10:46:32,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-09 10:46:32,259 INFO L87 Difference]: Start difference. First operand 242 states and 305 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-11-09 10:46:32,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:32,640 INFO L93 Difference]: Finished difference Result 542 states and 706 transitions. [2021-11-09 10:46:32,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-09 10:46:32,641 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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 49 [2021-11-09 10:46:32,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:32,645 INFO L225 Difference]: With dead ends: 542 [2021-11-09 10:46:32,645 INFO L226 Difference]: Without dead ends: 542 [2021-11-09 10:46:32,646 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:32,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2021-11-09 10:46:32,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 226. [2021-11-09 10:46:32,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 183 states have (on average 1.540983606557377) internal successors, (282), 222 states have internal predecessors, (282), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 285 transitions. [2021-11-09 10:46:32,658 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 285 transitions. Word has length 49 [2021-11-09 10:46:32,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:32,658 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 285 transitions. [2021-11-09 10:46:32,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 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) [2021-11-09 10:46:32,659 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 285 transitions. [2021-11-09 10:46:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:46:32,659 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:32,660 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-09 10:46:32,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:32,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-09 10:46:32,877 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:32,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:32,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1641765812, now seen corresponding path program 1 times [2021-11-09 10:46:32,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:32,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956603374] [2021-11-09 10:46:32,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:32,878 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:33,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:33,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:33,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:33,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:33,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956603374] [2021-11-09 10:46:33,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956603374] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:33,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800369659] [2021-11-09 10:46:33,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:33,235 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:33,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:33,237 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:33,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-09 10:46:33,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:33,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-09 10:46:33,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:33,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:46:33,786 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:46:33,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:46:33,971 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-09 10:46:33,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-09 10:46:34,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:46:34,225 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:46:34,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 42 [2021-11-09 10:46:34,634 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 10:46:34,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 77 treesize of output 34 [2021-11-09 10:46:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:34,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800369659] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:34,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:46:34,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-11-09 10:46:34,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415683366] [2021-11-09 10:46:34,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-09 10:46:34,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:34,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-09 10:46:34,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:46:34,700 INFO L87 Difference]: Start difference. First operand 226 states and 285 transitions. Second operand has 9 states, 8 states have (on average 6.0) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:35,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:35,199 INFO L93 Difference]: Finished difference Result 232 states and 287 transitions. [2021-11-09 10:46:35,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-09 10:46:35,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-11-09 10:46:35,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:35,202 INFO L225 Difference]: With dead ends: 232 [2021-11-09 10:46:35,202 INFO L226 Difference]: Without dead ends: 232 [2021-11-09 10:46:35,203 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=122, Invalid=478, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:46:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-09 10:46:35,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 226. [2021-11-09 10:46:35,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 183 states have (on average 1.53551912568306) internal successors, (281), 222 states have internal predecessors, (281), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 284 transitions. [2021-11-09 10:46:35,211 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 284 transitions. Word has length 51 [2021-11-09 10:46:35,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:35,211 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 284 transitions. [2021-11-09 10:46:35,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.0) internal successors, (48), 9 states have internal predecessors, (48), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 284 transitions. [2021-11-09 10:46:35,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-09 10:46:35,214 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:35,214 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-09 10:46:35,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:35,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-09 10:46:35,441 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:35,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:35,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1641765811, now seen corresponding path program 1 times [2021-11-09 10:46:35,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:35,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207869430] [2021-11-09 10:46:35,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:35,442 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:35,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:35,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:35,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:35,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207869430] [2021-11-09 10:46:35,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207869430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:35,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877971824] [2021-11-09 10:46:35,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:35,635 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:35,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:35,637 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:35,660 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-09 10:46:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:36,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-09 10:46:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:36,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:46:36,315 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:46:36,316 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:46:36,494 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-09 10:46:36,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 10:46:36,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:46:36,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:46:36,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:36,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 75 treesize of output 53 [2021-11-09 10:46:36,756 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:46:36,757 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 67 [2021-11-09 10:46:37,096 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 73 treesize of output 65 [2021-11-09 10:46:37,104 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:46:37,104 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 33 [2021-11-09 10:46:37,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:37,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877971824] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:37,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:37,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-11-09 10:46:37,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756881426] [2021-11-09 10:46:37,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:46:37,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:37,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:46:37,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-11-09 10:46:37,136 INFO L87 Difference]: Start difference. First operand 226 states and 284 transitions. Second operand has 18 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:38,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:38,408 INFO L93 Difference]: Finished difference Result 276 states and 332 transitions. [2021-11-09 10:46:38,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:46:38,409 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2021-11-09 10:46:38,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:38,411 INFO L225 Difference]: With dead ends: 276 [2021-11-09 10:46:38,411 INFO L226 Difference]: Without dead ends: 276 [2021-11-09 10:46:38,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=242, Invalid=948, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:46:38,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-11-09 10:46:38,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 226. [2021-11-09 10:46:38,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 183 states have (on average 1.530054644808743) internal successors, (280), 222 states have internal predecessors, (280), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:38,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 283 transitions. [2021-11-09 10:46:38,419 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 283 transitions. Word has length 51 [2021-11-09 10:46:38,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:38,420 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 283 transitions. [2021-11-09 10:46:38,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.882352941176471) internal successors, (83), 17 states have internal predecessors, (83), 1 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:38,420 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 283 transitions. [2021-11-09 10:46:38,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-09 10:46:38,421 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:38,421 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:38,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-09 10:46:38,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-09 10:46:38,637 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:38,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:38,637 INFO L85 PathProgramCache]: Analyzing trace with hash 815761428, now seen corresponding path program 1 times [2021-11-09 10:46:38,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:38,638 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975820857] [2021-11-09 10:46:38,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:38,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:38,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:38,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:38,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:38,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:38,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975820857] [2021-11-09 10:46:38,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975820857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:38,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100452009] [2021-11-09 10:46:38,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:38,790 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:38,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:38,791 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:38,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-09 10:46:39,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:39,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:46:39,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:39,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:46:39,387 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:46:39,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:46:39,505 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-09 10:46:39,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 10:46:39,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:46:39,646 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:46:39,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 32 [2021-11-09 10:46:41,805 INFO L354 Elim1Store]: treesize reduction 13, result has 7.1 percent of original size [2021-11-09 10:46:41,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 19 [2021-11-09 10:46:41,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:41,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100452009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:41,828 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:46:41,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2021-11-09 10:46:41,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072546057] [2021-11-09 10:46:41,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:46:41,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:41,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:46:41,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:46:41,830 INFO L87 Difference]: Start difference. First operand 226 states and 283 transitions. Second operand has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 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) [2021-11-09 10:46:56,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:56,631 INFO L93 Difference]: Finished difference Result 248 states and 303 transitions. [2021-11-09 10:46:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-09 10:46:56,631 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 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 54 [2021-11-09 10:46:56,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:56,633 INFO L225 Difference]: With dead ends: 248 [2021-11-09 10:46:56,633 INFO L226 Difference]: Without dead ends: 248 [2021-11-09 10:46:56,634 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2021-11-09 10:46:56,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-09 10:46:56,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 222. [2021-11-09 10:46:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 179 states have (on average 1.5363128491620113) internal successors, (275), 218 states have internal predecessors, (275), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 278 transitions. [2021-11-09 10:46:56,640 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 278 transitions. Word has length 54 [2021-11-09 10:46:56,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:56,641 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 278 transitions. [2021-11-09 10:46:56,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.0) internal successors, (75), 14 states have internal predecessors, (75), 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) [2021-11-09 10:46:56,641 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 278 transitions. [2021-11-09 10:46:56,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 10:46:56,642 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:56,642 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:56,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-09 10:46:56,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-09 10:46:56,857 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr28REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:56,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:56,858 INFO L85 PathProgramCache]: Analyzing trace with hash -141764210, now seen corresponding path program 1 times [2021-11-09 10:46:56,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:56,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869766448] [2021-11-09 10:46:56,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:56,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:56,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:56,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 10:46:56,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:56,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869766448] [2021-11-09 10:46:56,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869766448] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:56,954 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:56,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-09 10:46:56,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471875958] [2021-11-09 10:46:56,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-09 10:46:56,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:56,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-09 10:46:56,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-09 10:46:56,956 INFO L87 Difference]: Start difference. First operand 222 states and 278 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2021-11-09 10:46:57,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:57,393 INFO L93 Difference]: Finished difference Result 221 states and 276 transitions. [2021-11-09 10:46:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:46:57,394 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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 55 [2021-11-09 10:46:57,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:57,396 INFO L225 Difference]: With dead ends: 221 [2021-11-09 10:46:57,396 INFO L226 Difference]: Without dead ends: 221 [2021-11-09 10:46:57,397 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:46:57,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-11-09 10:46:57,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2021-11-09 10:46:57,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 179 states have (on average 1.5251396648044693) internal successors, (273), 217 states have internal predecessors, (273), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 276 transitions. [2021-11-09 10:46:57,405 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 276 transitions. Word has length 55 [2021-11-09 10:46:57,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:57,406 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 276 transitions. [2021-11-09 10:46:57,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 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) [2021-11-09 10:46:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 276 transitions. [2021-11-09 10:46:57,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-09 10:46:57,407 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:57,408 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:57,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-09 10:46:57,408 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr29REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:57,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:57,409 INFO L85 PathProgramCache]: Analyzing trace with hash -141764209, now seen corresponding path program 1 times [2021-11-09 10:46:57,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:57,409 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600019906] [2021-11-09 10:46:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:57,410 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:57,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:57,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:57,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:57,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:57,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600019906] [2021-11-09 10:46:57,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600019906] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:46:57,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:46:57,737 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-11-09 10:46:57,737 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933631870] [2021-11-09 10:46:57,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-09 10:46:57,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:46:57,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-09 10:46:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2021-11-09 10:46:57,739 INFO L87 Difference]: Start difference. First operand 221 states and 276 transitions. Second operand has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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) [2021-11-09 10:46:58,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:46:58,747 INFO L93 Difference]: Finished difference Result 298 states and 338 transitions. [2021-11-09 10:46:58,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-09 10:46:58,747 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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 55 [2021-11-09 10:46:58,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:46:58,750 INFO L225 Difference]: With dead ends: 298 [2021-11-09 10:46:58,750 INFO L226 Difference]: Without dead ends: 298 [2021-11-09 10:46:58,751 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=503, Unknown=0, NotChecked=0, Total=650 [2021-11-09 10:46:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2021-11-09 10:46:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 221. [2021-11-09 10:46:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 179 states have (on average 1.5195530726256983) internal successors, (272), 217 states have internal predecessors, (272), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:46:58,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 275 transitions. [2021-11-09 10:46:58,758 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 275 transitions. Word has length 55 [2021-11-09 10:46:58,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:46:58,759 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 275 transitions. [2021-11-09 10:46:58,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 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) [2021-11-09 10:46:58,759 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 275 transitions. [2021-11-09 10:46:58,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-09 10:46:58,760 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:46:58,760 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:46:58,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-09 10:46:58,761 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr32ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:46:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:46:58,762 INFO L85 PathProgramCache]: Analyzing trace with hash -1344628746, now seen corresponding path program 1 times [2021-11-09 10:46:58,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:46:58,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850572438] [2021-11-09 10:46:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:58,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:46:58,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:59,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:46:59,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:46:59,125 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:46:59,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850572438] [2021-11-09 10:46:59,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850572438] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:46:59,126 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927138024] [2021-11-09 10:46:59,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:46:59,126 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:46:59,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:46:59,129 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:46:59,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-09 10:46:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:46:59,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-09 10:46:59,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:46:59,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:47:00,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:00,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:47:00,219 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 [2021-11-09 10:47:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:00,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927138024] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:47:00,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:47:00,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [12] total 19 [2021-11-09 10:47:00,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188304409] [2021-11-09 10:47:00,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-09 10:47:00,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:00,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-09 10:47:00,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-11-09 10:47:00,251 INFO L87 Difference]: Start difference. First operand 221 states and 275 transitions. Second operand has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:47:00,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:00,423 INFO L93 Difference]: Finished difference Result 252 states and 289 transitions. [2021-11-09 10:47:00,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-09 10:47:00,424 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-11-09 10:47:00,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:00,425 INFO L225 Difference]: With dead ends: 252 [2021-11-09 10:47:00,425 INFO L226 Difference]: Without dead ends: 252 [2021-11-09 10:47:00,426 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2021-11-09 10:47:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-09 10:47:00,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 221. [2021-11-09 10:47:00,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 179 states have (on average 1.5139664804469273) internal successors, (271), 217 states have internal predecessors, (271), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:47:00,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 274 transitions. [2021-11-09 10:47:00,433 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 274 transitions. Word has length 58 [2021-11-09 10:47:00,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:00,433 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 274 transitions. [2021-11-09 10:47:00,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 6.111111111111111) internal successors, (55), 10 states have internal predecessors, (55), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:47:00,434 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 274 transitions. [2021-11-09 10:47:00,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-09 10:47:00,435 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:00,435 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:00,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:00,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:00,656 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr33ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:47:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:00,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1266182001, now seen corresponding path program 1 times [2021-11-09 10:47:00,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:00,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979299120] [2021-11-09 10:47:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:00,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:00,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:00,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:47:00,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:00,885 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:00,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:00,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979299120] [2021-11-09 10:47:00,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979299120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:00,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11755713] [2021-11-09 10:47:00,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:00,886 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:00,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:00,887 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:00,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-09 10:47:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:01,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:47:01,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:01,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:47:01,900 INFO L354 Elim1Store]: treesize reduction 29, result has 19.4 percent of original size [2021-11-09 10:47:01,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 26 [2021-11-09 10:47:02,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2021-11-09 10:47:02,070 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:02,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11755713] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:02,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:02,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-11-09 10:47:02,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588244851] [2021-11-09 10:47:02,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-09 10:47:02,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:02,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-09 10:47:02,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:47:02,072 INFO L87 Difference]: Start difference. First operand 221 states and 274 transitions. Second operand has 15 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 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) [2021-11-09 10:47:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:02,772 INFO L93 Difference]: Finished difference Result 241 states and 276 transitions. [2021-11-09 10:47:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-09 10:47:02,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 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 59 [2021-11-09 10:47:02,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:02,774 INFO L225 Difference]: With dead ends: 241 [2021-11-09 10:47:02,774 INFO L226 Difference]: Without dead ends: 241 [2021-11-09 10:47:02,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2021-11-09 10:47:02,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-11-09 10:47:02,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 221. [2021-11-09 10:47:02,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 179 states have (on average 1.5083798882681565) internal successors, (270), 217 states have internal predecessors, (270), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:47:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 273 transitions. [2021-11-09 10:47:02,782 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 273 transitions. Word has length 59 [2021-11-09 10:47:02,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:02,783 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 273 transitions. [2021-11-09 10:47:02,783 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.642857142857143) internal successors, (93), 14 states have internal predecessors, (93), 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) [2021-11-09 10:47:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 273 transitions. [2021-11-09 10:47:02,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:47:02,784 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:02,785 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:02,823 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-11-09 10:47:03,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-09 10:47:03,001 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:47:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:03,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1869600869, now seen corresponding path program 1 times [2021-11-09 10:47:03,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:03,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433860708] [2021-11-09 10:47:03,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:03,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:03,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:03,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:47:03,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:03,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:03,745 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:03,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433860708] [2021-11-09 10:47:03,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433860708] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:03,746 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907348278] [2021-11-09 10:47:03,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:03,746 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:03,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:03,765 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:03,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-09 10:47:04,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:04,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-09 10:47:04,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:04,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:47:04,345 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:47:04,346 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:47:04,503 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 17 treesize of output 13 [2021-11-09 10:47:04,635 INFO L354 Elim1Store]: treesize reduction 60, result has 31.0 percent of original size [2021-11-09 10:47:04,635 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 10:47:04,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 24 [2021-11-09 10:47:04,908 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:47:04,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 27 [2021-11-09 10:47:04,989 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:47:04,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 27 [2021-11-09 10:47:05,129 INFO L354 Elim1Store]: treesize reduction 78, result has 31.6 percent of original size [2021-11-09 10:47:05,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 7 case distinctions, treesize of input 31 treesize of output 53 [2021-11-09 10:47:05,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-11-09 10:47:05,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:05,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-11-09 10:47:05,737 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:05,765 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-11-09 10:47:05,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 95 treesize of output 75 [2021-11-09 10:47:07,005 INFO L354 Elim1Store]: treesize reduction 122, result has 2.4 percent of original size [2021-11-09 10:47:07,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 158 treesize of output 75 [2021-11-09 10:47:07,020 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 54 treesize of output 50 [2021-11-09 10:47:07,751 INFO L354 Elim1Store]: treesize reduction 90, result has 15.1 percent of original size [2021-11-09 10:47:07,751 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 47 treesize of output 53 [2021-11-09 10:47:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:07,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907348278] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:07,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:07,917 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-11-09 10:47:07,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430753128] [2021-11-09 10:47:07,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-09 10:47:07,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:07,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-09 10:47:07,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-11-09 10:47:07,920 INFO L87 Difference]: Start difference. First operand 221 states and 273 transitions. Second operand has 37 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 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) [2021-11-09 10:47:12,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:47:12,833 INFO L93 Difference]: Finished difference Result 328 states and 392 transitions. [2021-11-09 10:47:12,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:47:12,834 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 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 62 [2021-11-09 10:47:12,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:47:12,836 INFO L225 Difference]: With dead ends: 328 [2021-11-09 10:47:12,836 INFO L226 Difference]: Without dead ends: 328 [2021-11-09 10:47:12,838 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=506, Invalid=2574, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 10:47:12,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-11-09 10:47:12,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 219. [2021-11-09 10:47:12,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 177 states have (on average 1.497175141242938) internal successors, (265), 215 states have internal predecessors, (265), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:47:12,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 268 transitions. [2021-11-09 10:47:12,845 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 268 transitions. Word has length 62 [2021-11-09 10:47:12,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:47:12,846 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 268 transitions. [2021-11-09 10:47:12,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 3.1666666666666665) internal successors, (114), 36 states have internal predecessors, (114), 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) [2021-11-09 10:47:12,846 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 268 transitions. [2021-11-09 10:47:12,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-09 10:47:12,847 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:47:12,848 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:47:12,895 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-09 10:47:13,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:13,073 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr36REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:47:13,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:47:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1869600868, now seen corresponding path program 1 times [2021-11-09 10:47:13,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:47:13,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669817614] [2021-11-09 10:47:13,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:13,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:47:13,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:14,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:47:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:14,036 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:14,036 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:47:14,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669817614] [2021-11-09 10:47:14,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669817614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:14,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334742857] [2021-11-09 10:47:14,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:47:14,037 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:47:14,038 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:47:14,041 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:47:14,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-09 10:47:14,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:47:14,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 10:47:14,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:47:14,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:47:14,752 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:47:14,763 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:47:14,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:47:14,903 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 17 treesize of output 13 [2021-11-09 10:47:14,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:47:15,046 INFO L354 Elim1Store]: treesize reduction 52, result has 22.4 percent of original size [2021-11-09 10:47:15,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 26 [2021-11-09 10:47:15,064 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:47:15,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 10:47:15,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2021-11-09 10:47:15,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:47:15,299 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:47:15,300 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 10:47:15,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:15,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:47:15,380 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:47:15,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-11-09 10:47:15,395 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:15,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:47:15,468 INFO L354 Elim1Store]: treesize reduction 78, result has 20.4 percent of original size [2021-11-09 10:47:15,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 26 treesize of output 34 [2021-11-09 10:47:15,729 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-09 10:47:15,730 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 46 [2021-11-09 10:47:15,824 INFO L354 Elim1Store]: treesize reduction 32, result has 49.2 percent of original size [2021-11-09 10:47:15,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 44 [2021-11-09 10:47:16,158 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:16,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 49 [2021-11-09 10:47:16,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:16,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 44 [2021-11-09 10:47:16,420 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:16,487 INFO L354 Elim1Store]: treesize reduction 96, result has 32.4 percent of original size [2021-11-09 10:47:16,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 173 treesize of output 177 [2021-11-09 10:47:16,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:16,553 INFO L354 Elim1Store]: treesize reduction 106, result has 31.2 percent of original size [2021-11-09 10:47:16,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 260 treesize of output 245 [2021-11-09 10:47:19,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:19,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:47:19,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:47:19,646 INFO L354 Elim1Store]: treesize reduction 47, result has 27.7 percent of original size [2021-11-09 10:47:19,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 7 case distinctions, treesize of input 372 treesize of output 217 [2021-11-09 10:47:25,601 INFO L354 Elim1Store]: treesize reduction 101, result has 13.7 percent of original size [2021-11-09 10:47:25,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 163 treesize of output 114 [2021-11-09 10:47:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:47:30,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334742857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:47:30,214 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:47:30,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 20] total 34 [2021-11-09 10:47:30,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799827447] [2021-11-09 10:47:30,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-09 10:47:30,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:47:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-09 10:47:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1079, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:47:30,217 INFO L87 Difference]: Start difference. First operand 219 states and 268 transitions. Second operand has 35 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 34 states have internal predecessors, (114), 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) [2021-11-09 10:48:19,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:19,660 INFO L93 Difference]: Finished difference Result 347 states and 412 transitions. [2021-11-09 10:48:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 10:48:19,661 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 34 states have internal predecessors, (114), 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 62 [2021-11-09 10:48:19,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:19,663 INFO L225 Difference]: With dead ends: 347 [2021-11-09 10:48:19,663 INFO L226 Difference]: Without dead ends: 347 [2021-11-09 10:48:19,665 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=690, Invalid=3465, Unknown=5, NotChecked=0, Total=4160 [2021-11-09 10:48:19,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2021-11-09 10:48:19,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 230. [2021-11-09 10:48:19,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 188 states have (on average 1.5265957446808511) internal successors, (287), 226 states have internal predecessors, (287), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:19,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 290 transitions. [2021-11-09 10:48:19,673 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 290 transitions. Word has length 62 [2021-11-09 10:48:19,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:19,674 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 290 transitions. [2021-11-09 10:48:19,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 3.3529411764705883) internal successors, (114), 34 states have internal predecessors, (114), 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) [2021-11-09 10:48:19,674 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 290 transitions. [2021-11-09 10:48:19,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:48:19,675 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:19,675 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:19,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-09 10:48:19,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:19,896 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:48:19,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:19,897 INFO L85 PathProgramCache]: Analyzing trace with hash -2123052773, now seen corresponding path program 1 times [2021-11-09 10:48:19,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:19,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27162828] [2021-11-09 10:48:19,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:19,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:20,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:20,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:20,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27162828] [2021-11-09 10:48:20,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27162828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:20,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683586946] [2021-11-09 10:48:20,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:20,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:20,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:20,230 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:20,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-09 10:48:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:21,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 10:48:21,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:21,719 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 38 treesize of output 30 [2021-11-09 10:48:21,722 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 27 treesize of output 19 [2021-11-09 10:48:21,904 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:48:21,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 10:48:21,951 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 19 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:21,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683586946] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:21,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:21,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-11-09 10:48:21,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256402009] [2021-11-09 10:48:21,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-09 10:48:21,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:21,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-09 10:48:21,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-11-09 10:48:21,954 INFO L87 Difference]: Start difference. First operand 230 states and 290 transitions. Second operand has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 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) [2021-11-09 10:48:23,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:23,512 INFO L93 Difference]: Finished difference Result 326 states and 377 transitions. [2021-11-09 10:48:23,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-09 10:48:23,513 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 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 63 [2021-11-09 10:48:23,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:23,515 INFO L225 Difference]: With dead ends: 326 [2021-11-09 10:48:23,515 INFO L226 Difference]: Without dead ends: 326 [2021-11-09 10:48:23,516 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=1326, Unknown=0, NotChecked=0, Total=1640 [2021-11-09 10:48:23,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 326 states. [2021-11-09 10:48:23,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 326 to 239. [2021-11-09 10:48:23,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 198 states have (on average 1.52020202020202) internal successors, (301), 235 states have internal predecessors, (301), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:23,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 304 transitions. [2021-11-09 10:48:23,523 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 304 transitions. Word has length 63 [2021-11-09 10:48:23,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:23,523 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 304 transitions. [2021-11-09 10:48:23,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 4.818181818181818) internal successors, (106), 22 states have internal predecessors, (106), 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) [2021-11-09 10:48:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 304 transitions. [2021-11-09 10:48:23,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:48:23,525 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:23,525 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:23,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:23,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-09 10:48:23,741 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr50REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:48:23,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash -2123052772, now seen corresponding path program 1 times [2021-11-09 10:48:23,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:23,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514383784] [2021-11-09 10:48:23,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:23,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:23,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:23,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:23,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-09 10:48:23,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:23,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514383784] [2021-11-09 10:48:23,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514383784] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:23,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879859453] [2021-11-09 10:48:23,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:23,864 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:23,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:23,865 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:23,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-09 10:48:24,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:24,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-09 10:48:24,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-09 10:48:25,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879859453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:25,167 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:48:25,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-09 10:48:25,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485855973] [2021-11-09 10:48:25,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-09 10:48:25,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:25,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-09 10:48:25,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-09 10:48:25,168 INFO L87 Difference]: Start difference. First operand 239 states and 304 transitions. Second operand has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:25,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:25,341 INFO L93 Difference]: Finished difference Result 293 states and 357 transitions. [2021-11-09 10:48:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-09 10:48:25,341 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-11-09 10:48:25,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:25,343 INFO L225 Difference]: With dead ends: 293 [2021-11-09 10:48:25,343 INFO L226 Difference]: Without dead ends: 293 [2021-11-09 10:48:25,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-09 10:48:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-11-09 10:48:25,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 255. [2021-11-09 10:48:25,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 218 states have (on average 1.4908256880733946) internal successors, (325), 251 states have internal predecessors, (325), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:25,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 328 transitions. [2021-11-09 10:48:25,350 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 328 transitions. Word has length 63 [2021-11-09 10:48:25,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:25,351 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 328 transitions. [2021-11-09 10:48:25,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 12.5) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:25,351 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 328 transitions. [2021-11-09 10:48:25,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:48:25,353 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:25,353 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:25,399 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:25,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-09 10:48:25,577 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:48:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:25,577 INFO L85 PathProgramCache]: Analyzing trace with hash -2123051969, now seen corresponding path program 1 times [2021-11-09 10:48:25,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:25,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215632950] [2021-11-09 10:48:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:25,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:26,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:26,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:26,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:26,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:26,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215632950] [2021-11-09 10:48:26,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215632950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:26,345 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503480255] [2021-11-09 10:48:26,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:26,345 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:26,346 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:26,349 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:26,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-09 10:48:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:27,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 10:48:27,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:27,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:48:28,065 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:48:28,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:48:28,250 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 11 treesize of output 7 [2021-11-09 10:48:28,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:28,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 32 [2021-11-09 10:48:29,030 INFO L354 Elim1Store]: treesize reduction 14, result has 68.9 percent of original size [2021-11-09 10:48:29,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 93 treesize of output 80 [2021-11-09 10:48:29,034 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 71 treesize of output 55 [2021-11-09 10:48:29,442 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-11-09 10:48:29,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 21 [2021-11-09 10:48:29,501 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:29,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503480255] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:29,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:48:29,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [20] total 37 [2021-11-09 10:48:29,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240947258] [2021-11-09 10:48:29,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-09 10:48:29,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:29,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-09 10:48:29,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=1242, Unknown=0, NotChecked=0, Total=1406 [2021-11-09 10:48:29,503 INFO L87 Difference]: Start difference. First operand 255 states and 328 transitions. Second operand has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:30,992 INFO L93 Difference]: Finished difference Result 343 states and 405 transitions. [2021-11-09 10:48:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-09 10:48:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-11-09 10:48:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:30,995 INFO L225 Difference]: With dead ends: 343 [2021-11-09 10:48:30,995 INFO L226 Difference]: Without dead ends: 343 [2021-11-09 10:48:30,996 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=390, Invalid=2690, Unknown=0, NotChecked=0, Total=3080 [2021-11-09 10:48:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2021-11-09 10:48:31,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 255. [2021-11-09 10:48:31,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 218 states have (on average 1.4862385321100917) internal successors, (324), 251 states have internal predecessors, (324), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:31,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 327 transitions. [2021-11-09 10:48:31,003 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 327 transitions. Word has length 63 [2021-11-09 10:48:31,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:31,003 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 327 transitions. [2021-11-09 10:48:31,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 19 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:31,004 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 327 transitions. [2021-11-09 10:48:31,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-09 10:48:31,005 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:31,005 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:31,057 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:31,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:31,221 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr38REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:48:31,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:31,221 INFO L85 PathProgramCache]: Analyzing trace with hash -2123051968, now seen corresponding path program 1 times [2021-11-09 10:48:31,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:31,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972094261] [2021-11-09 10:48:31,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:31,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:31,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:32,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:32,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:32,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:32,008 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:32,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972094261] [2021-11-09 10:48:32,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972094261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:32,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626709346] [2021-11-09 10:48:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:32,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:32,013 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:32,037 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-09 10:48:33,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:33,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-09 10:48:33,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:33,384 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:48:33,499 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:48:33,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:48:33,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:48:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:33,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 39 [2021-11-09 10:48:33,754 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 42 treesize of output 34 [2021-11-09 10:48:34,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:34,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-09 10:48:34,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 85 treesize of output 82 [2021-11-09 10:48:34,683 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-11-09 10:48:34,683 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 82 [2021-11-09 10:48:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:35,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626709346] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:48:35,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:48:35,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [19] total 34 [2021-11-09 10:48:35,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968357759] [2021-11-09 10:48:35,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-09 10:48:35,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:35,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-09 10:48:35,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-11-09 10:48:35,067 INFO L87 Difference]: Start difference. First operand 255 states and 327 transitions. Second operand has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 18 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:38,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:48:38,268 INFO L93 Difference]: Finished difference Result 330 states and 390 transitions. [2021-11-09 10:48:38,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-09 10:48:38,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 18 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2021-11-09 10:48:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:48:38,271 INFO L225 Difference]: With dead ends: 330 [2021-11-09 10:48:38,271 INFO L226 Difference]: Without dead ends: 330 [2021-11-09 10:48:38,272 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=379, Invalid=2171, Unknown=0, NotChecked=0, Total=2550 [2021-11-09 10:48:38,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-11-09 10:48:38,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 266. [2021-11-09 10:48:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 229 states have (on average 1.497816593886463) internal successors, (343), 262 states have internal predecessors, (343), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:38,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 346 transitions. [2021-11-09 10:48:38,280 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 346 transitions. Word has length 63 [2021-11-09 10:48:38,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:48:38,280 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 346 transitions. [2021-11-09 10:48:38,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 18 states have internal predecessors, (60), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:48:38,281 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 346 transitions. [2021-11-09 10:48:38,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-09 10:48:38,282 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:48:38,282 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:48:38,319 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-09 10:48:38,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:38,501 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:48:38,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:48:38,502 INFO L85 PathProgramCache]: Analyzing trace with hash -994609409, now seen corresponding path program 1 times [2021-11-09 10:48:38,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:48:38,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837780032] [2021-11-09 10:48:38,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:38,502 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:48:38,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:39,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:48:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:39,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:48:39,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837780032] [2021-11-09 10:48:39,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837780032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:39,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373788139] [2021-11-09 10:48:39,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:48:39,132 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:48:39,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:48:39,143 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:48:39,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-09 10:48:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:48:40,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-09 10:48:40,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:48:40,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:48:40,366 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 [2021-11-09 10:48:40,455 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:48:40,455 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:48:40,528 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 20 treesize of output 19 [2021-11-09 10:48:40,651 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:48:40,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2021-11-09 10:48:40,715 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:48:40,715 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 22 [2021-11-09 10:48:40,797 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-09 10:48:40,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 10:48:40,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-09 10:48:41,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:41,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 29 [2021-11-09 10:48:41,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:48:41,173 INFO L354 Elim1Store]: treesize reduction 108, result has 16.9 percent of original size [2021-11-09 10:48:41,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 57 treesize of output 53 [2021-11-09 10:48:41,552 INFO L354 Elim1Store]: treesize reduction 122, result has 2.4 percent of original size [2021-11-09 10:48:41,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 81 treesize of output 38 [2021-11-09 10:48:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:48:41,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373788139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:48:41,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:48:41,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 14] total 34 [2021-11-09 10:48:41,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993149321] [2021-11-09 10:48:41,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-09 10:48:41,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:48:41,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-09 10:48:41,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1018, Unknown=0, NotChecked=0, Total=1122 [2021-11-09 10:48:41,667 INFO L87 Difference]: Start difference. First operand 266 states and 346 transitions. Second operand has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 33 states have internal predecessors, (124), 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) [2021-11-09 10:49:05,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:05,613 INFO L93 Difference]: Finished difference Result 341 states and 418 transitions. [2021-11-09 10:49:05,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:49:05,614 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 33 states have internal predecessors, (124), 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 67 [2021-11-09 10:49:05,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:05,617 INFO L225 Difference]: With dead ends: 341 [2021-11-09 10:49:05,617 INFO L226 Difference]: Without dead ends: 341 [2021-11-09 10:49:05,619 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1227 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=730, Invalid=4371, Unknown=11, NotChecked=0, Total=5112 [2021-11-09 10:49:05,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 341 states. [2021-11-09 10:49:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 341 to 265. [2021-11-09 10:49:05,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 228 states have (on average 1.4912280701754386) internal successors, (340), 261 states have internal predecessors, (340), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:49:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 343 transitions. [2021-11-09 10:49:05,628 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 343 transitions. Word has length 67 [2021-11-09 10:49:05,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:05,628 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 343 transitions. [2021-11-09 10:49:05,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.6470588235294117) internal successors, (124), 33 states have internal predecessors, (124), 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) [2021-11-09 10:49:05,629 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 343 transitions. [2021-11-09 10:49:05,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 10:49:05,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:05,630 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:05,669 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:05,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:05,857 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:49:05,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:05,857 INFO L85 PathProgramCache]: Analyzing trace with hash 2083948543, now seen corresponding path program 1 times [2021-11-09 10:49:05,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:05,858 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469558530] [2021-11-09 10:49:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:05,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:05,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:06,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:06,564 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:06,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469558530] [2021-11-09 10:49:06,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469558530] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:06,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070515521] [2021-11-09 10:49:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:06,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:06,567 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:06,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-09 10:49:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:07,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-09 10:49:07,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:07,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:49:07,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:49:07,804 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2021-11-09 10:49:07,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-09 10:49:07,872 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:49:07,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 10:49:07,914 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:49:07,991 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:49:07,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:49:08,067 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:49:08,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:49:08,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:08,306 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-11-09 10:49:08,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-09 10:49:08,430 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:08,441 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:49:08,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 35 [2021-11-09 10:49:08,549 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:08,551 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:08,569 INFO L354 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2021-11-09 10:49:08,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 54 [2021-11-09 10:49:09,201 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 25 treesize of output 17 [2021-11-09 10:49:09,557 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:09,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:09,603 INFO L354 Elim1Store]: treesize reduction 144, result has 15.3 percent of original size [2021-11-09 10:49:09,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 87 treesize of output 69 [2021-11-09 10:49:11,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:11,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:11,374 INFO L354 Elim1Store]: treesize reduction 196, result has 15.5 percent of original size [2021-11-09 10:49:11,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 78 [2021-11-09 10:49:12,205 INFO L354 Elim1Store]: treesize reduction 73, result has 27.7 percent of original size [2021-11-09 10:49:12,205 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 7 new quantified variables, introduced 10 case distinctions, treesize of input 87 treesize of output 72 [2021-11-09 10:49:12,252 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:12,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070515521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:12,253 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:12,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 42 [2021-11-09 10:49:12,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192344941] [2021-11-09 10:49:12,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 10:49:12,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:12,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 10:49:12,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=1643, Unknown=2, NotChecked=0, Total=1806 [2021-11-09 10:49:12,256 INFO L87 Difference]: Start difference. First operand 265 states and 343 transitions. Second operand has 43 states, 42 states have (on average 2.738095238095238) internal successors, (115), 42 states have internal predecessors, (115), 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) [2021-11-09 10:49:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:49:26,957 INFO L93 Difference]: Finished difference Result 435 states and 558 transitions. [2021-11-09 10:49:26,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-09 10:49:26,957 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.738095238095238) internal successors, (115), 42 states have internal predecessors, (115), 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 68 [2021-11-09 10:49:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:49:26,960 INFO L225 Difference]: With dead ends: 435 [2021-11-09 10:49:26,960 INFO L226 Difference]: Without dead ends: 435 [2021-11-09 10:49:26,961 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=505, Invalid=3911, Unknown=6, NotChecked=0, Total=4422 [2021-11-09 10:49:26,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2021-11-09 10:49:26,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 335. [2021-11-09 10:49:26,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 298 states have (on average 1.412751677852349) internal successors, (421), 331 states have internal predecessors, (421), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:49:26,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 424 transitions. [2021-11-09 10:49:26,971 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 424 transitions. Word has length 68 [2021-11-09 10:49:26,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:49:26,972 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 424 transitions. [2021-11-09 10:49:26,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.738095238095238) internal successors, (115), 42 states have internal predecessors, (115), 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) [2021-11-09 10:49:26,972 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 424 transitions. [2021-11-09 10:49:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-09 10:49:26,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:49:26,974 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:49:27,025 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-09 10:49:27,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-09 10:49:27,193 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:49:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:49:27,193 INFO L85 PathProgramCache]: Analyzing trace with hash 2083948544, now seen corresponding path program 1 times [2021-11-09 10:49:27,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:49:27,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204186369] [2021-11-09 10:49:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:27,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:49:27,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:28,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:49:28,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:28,280 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:28,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:49:28,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204186369] [2021-11-09 10:49:28,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204186369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:28,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150586484] [2021-11-09 10:49:28,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:49:28,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:49:28,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:49:28,286 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:49:28,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-09 10:49:29,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:49:29,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-09 10:49:29,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:49:29,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:49:29,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:49:29,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:49:29,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:49:29,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:49:30,018 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:49:30,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 10:49:30,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:49:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:49:30,217 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:49:30,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:49:30,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:30,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:49:30,296 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:49:30,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:49:30,310 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:30,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:49:30,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:30,599 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-11-09 10:49:30,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-09 10:49:30,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:30,633 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 10:49:30,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-11-09 10:49:30,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:30,773 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:49:30,774 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-11-09 10:49:30,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:30,801 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:49:30,802 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-11-09 10:49:30,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:30,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:30,927 INFO L354 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2021-11-09 10:49:30,927 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 90 [2021-11-09 10:49:30,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:30,933 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:30,954 INFO L354 Elim1Store]: treesize reduction 93, result has 27.3 percent of original size [2021-11-09 10:49:30,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 134 treesize of output 155 [2021-11-09 10:49:32,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:32,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:32,847 INFO L354 Elim1Store]: treesize reduction 152, result has 10.6 percent of original size [2021-11-09 10:49:32,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 224 treesize of output 141 [2021-11-09 10:49:32,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:32,853 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:32,890 INFO L354 Elim1Store]: treesize reduction 180, result has 10.9 percent of original size [2021-11-09 10:49:32,891 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 140 treesize of output 123 [2021-11-09 10:49:34,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:34,725 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:34,769 INFO L354 Elim1Store]: treesize reduction 156, result has 17.5 percent of original size [2021-11-09 10:49:34,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 156 treesize of output 147 [2021-11-09 10:49:34,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:49:34,777 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:49:34,819 INFO L354 Elim1Store]: treesize reduction 156, result has 17.5 percent of original size [2021-11-09 10:49:34,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 141 treesize of output 132 [2021-11-09 10:49:35,518 INFO L354 Elim1Store]: treesize reduction 40, result has 45.2 percent of original size [2021-11-09 10:49:35,518 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 170 treesize of output 136 [2021-11-09 10:49:35,539 INFO L354 Elim1Store]: treesize reduction 49, result has 19.7 percent of original size [2021-11-09 10:49:35,539 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 124 treesize of output 99 [2021-11-09 10:49:35,675 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 14 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:49:35,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150586484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:49:35,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:49:35,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 45 [2021-11-09 10:49:35,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452722274] [2021-11-09 10:49:35,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-09 10:49:35,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:49:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-09 10:49:35,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1902, Unknown=0, NotChecked=0, Total=2070 [2021-11-09 10:49:35,679 INFO L87 Difference]: Start difference. First operand 335 states and 424 transitions. Second operand has 46 states, 45 states have (on average 2.6) internal successors, (117), 45 states have internal predecessors, (117), 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) [2021-11-09 10:50:19,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:50:19,102 INFO L93 Difference]: Finished difference Result 582 states and 733 transitions. [2021-11-09 10:50:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-09 10:50:19,102 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.6) internal successors, (117), 45 states have internal predecessors, (117), 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 68 [2021-11-09 10:50:19,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:50:19,105 INFO L225 Difference]: With dead ends: 582 [2021-11-09 10:50:19,105 INFO L226 Difference]: Without dead ends: 582 [2021-11-09 10:50:19,107 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1298 ImplicationChecksByTransitivity, 39.7s TimeCoverageRelationStatistics Valid=664, Invalid=4580, Unknown=12, NotChecked=0, Total=5256 [2021-11-09 10:50:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-09 10:50:19,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 340. [2021-11-09 10:50:19,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 303 states have (on average 1.4059405940594059) internal successors, (426), 336 states have internal predecessors, (426), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:50:19,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 429 transitions. [2021-11-09 10:50:19,121 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 429 transitions. Word has length 68 [2021-11-09 10:50:19,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:50:19,121 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 429 transitions. [2021-11-09 10:50:19,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.6) internal successors, (117), 45 states have internal predecessors, (117), 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) [2021-11-09 10:50:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 429 transitions. [2021-11-09 10:50:19,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-09 10:50:19,123 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:50:19,123 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:50:19,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-09 10:50:19,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-09 10:50:19,349 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr35REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:50:19,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:50:19,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1245557913, now seen corresponding path program 1 times [2021-11-09 10:50:19,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:50:19,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445683032] [2021-11-09 10:50:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:19,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:50:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:20,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:50:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:20,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:20,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:50:20,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445683032] [2021-11-09 10:50:20,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445683032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:20,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372684343] [2021-11-09 10:50:20,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:50:20,932 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:50:20,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:50:20,933 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:50:20,939 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-09 10:50:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:50:22,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-09 10:50:22,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:50:22,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:50:22,580 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:50:22,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:50:22,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:50:22,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:50:22,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:50:22,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:50:22,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,719 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:50:22,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,725 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:50:22,765 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:50:22,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:50:22,843 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,847 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:50:22,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:22,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:50:23,061 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-11-09 10:50:23,061 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 62 [2021-11-09 10:50:23,067 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-11-09 10:50:23,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 67 [2021-11-09 10:50:23,299 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:50:23,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 10:50:23,468 INFO L354 Elim1Store]: treesize reduction 33, result has 17.5 percent of original size [2021-11-09 10:50:23,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 91 treesize of output 83 [2021-11-09 10:50:23,482 INFO L354 Elim1Store]: treesize reduction 49, result has 18.3 percent of original size [2021-11-09 10:50:23,482 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 87 treesize of output 92 [2021-11-09 10:50:23,775 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-09 10:50:23,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 101 [2021-11-09 10:50:23,798 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-11-09 10:50:23,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 95 [2021-11-09 10:50:23,951 INFO L354 Elim1Store]: treesize reduction 100, result has 16.0 percent of original size [2021-11-09 10:50:23,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 121 treesize of output 114 [2021-11-09 10:50:23,974 INFO L354 Elim1Store]: treesize reduction 80, result has 15.8 percent of original size [2021-11-09 10:50:23,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 5 case distinctions, treesize of input 102 treesize of output 82 [2021-11-09 10:50:24,065 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-11-09 10:50:24,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2021-11-09 10:50:24,407 INFO L354 Elim1Store]: treesize reduction 45, result has 13.5 percent of original size [2021-11-09 10:50:24,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 99 [2021-11-09 10:50:24,423 INFO L354 Elim1Store]: treesize reduction 65, result has 14.5 percent of original size [2021-11-09 10:50:24,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 101 [2021-11-09 10:50:24,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:24,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:50:24,582 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:50:24,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 104 treesize of output 92 [2021-11-09 10:50:24,595 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:24,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:50:24,607 INFO L354 Elim1Store]: treesize reduction 57, result has 16.2 percent of original size [2021-11-09 10:50:24,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 93 treesize of output 94 [2021-11-09 10:50:24,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:24,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:50:24,794 INFO L354 Elim1Store]: treesize reduction 188, result has 13.4 percent of original size [2021-11-09 10:50:24,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 142 treesize of output 116 [2021-11-09 10:50:24,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:50:24,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:50:24,838 INFO L354 Elim1Store]: treesize reduction 192, result has 14.7 percent of original size [2021-11-09 10:50:24,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 187 treesize of output 177 [2021-11-09 10:50:26,344 INFO L354 Elim1Store]: treesize reduction 336, result has 12.0 percent of original size [2021-11-09 10:50:26,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 20 case distinctions, treesize of input 243 treesize of output 225 [2021-11-09 10:50:26,425 INFO L354 Elim1Store]: treesize reduction 292, result has 12.0 percent of original size [2021-11-09 10:50:26,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 20 case distinctions, treesize of input 204 treesize of output 143 [2021-11-09 10:50:26,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 90 [2021-11-09 10:50:27,095 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:50:27,096 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 95 treesize of output 95 [2021-11-09 10:50:27,569 INFO L354 Elim1Store]: treesize reduction 282, result has 13.0 percent of original size [2021-11-09 10:50:27,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 172 treesize of output 145 [2021-11-09 10:50:27,663 INFO L354 Elim1Store]: treesize reduction 320, result has 12.6 percent of original size [2021-11-09 10:50:27,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 178 treesize of output 180 [2021-11-09 10:50:28,521 INFO L354 Elim1Store]: treesize reduction 240, result has 1.2 percent of original size [2021-11-09 10:50:28,522 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 8 new quantified variables, introduced 15 case distinctions, treesize of input 192 treesize of output 97 [2021-11-09 10:50:28,554 INFO L354 Elim1Store]: treesize reduction 168, result has 1.8 percent of original size [2021-11-09 10:50:28,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 15 case distinctions, treesize of input 73 treesize of output 52 [2021-11-09 10:50:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:50:28,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372684343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:50:28,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:50:28,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 42 [2021-11-09 10:50:28,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030137743] [2021-11-09 10:50:28,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 10:50:28,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:50:28,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 10:50:28,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1519, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:50:28,588 INFO L87 Difference]: Start difference. First operand 340 states and 429 transitions. Second operand has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 41 states have internal predecessors, (118), 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) [2021-11-09 10:52:36,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:36,934 INFO L93 Difference]: Finished difference Result 476 states and 577 transitions. [2021-11-09 10:52:36,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-09 10:52:36,935 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 41 states have internal predecessors, (118), 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 71 [2021-11-09 10:52:36,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:36,937 INFO L225 Difference]: With dead ends: 476 [2021-11-09 10:52:36,937 INFO L226 Difference]: Without dead ends: 476 [2021-11-09 10:52:36,939 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 65 SyntacticMatches, 6 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1974 ImplicationChecksByTransitivity, 35.7s TimeCoverageRelationStatistics Valid=893, Invalid=5735, Unknown=14, NotChecked=0, Total=6642 [2021-11-09 10:52:36,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-11-09 10:52:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 418. [2021-11-09 10:52:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 381 states have (on average 1.3438320209973753) internal successors, (512), 414 states have internal predecessors, (512), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:52:36,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 515 transitions. [2021-11-09 10:52:36,948 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 515 transitions. Word has length 71 [2021-11-09 10:52:36,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:36,949 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 515 transitions. [2021-11-09 10:52:36,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.8095238095238093) internal successors, (118), 41 states have internal predecessors, (118), 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) [2021-11-09 10:52:36,949 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 515 transitions. [2021-11-09 10:52:36,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 10:52:36,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:36,951 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:36,995 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-09 10:52:37,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:37,165 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr49REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:52:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:37,165 INFO L85 PathProgramCache]: Analyzing trace with hash -884126577, now seen corresponding path program 1 times [2021-11-09 10:52:37,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:37,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176859534] [2021-11-09 10:52:37,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:37,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:37,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:37,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:52:37,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 10:52:37,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:37,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176859534] [2021-11-09 10:52:37,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176859534] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:37,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:37,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:52:37,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127450590] [2021-11-09 10:52:37,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:52:37,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:37,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:52:37,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:52:37,304 INFO L87 Difference]: Start difference. First operand 418 states and 515 transitions. Second operand has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 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) [2021-11-09 10:52:37,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:37,960 INFO L93 Difference]: Finished difference Result 493 states and 591 transitions. [2021-11-09 10:52:37,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:52:37,961 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 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 72 [2021-11-09 10:52:37,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:37,964 INFO L225 Difference]: With dead ends: 493 [2021-11-09 10:52:37,964 INFO L226 Difference]: Without dead ends: 493 [2021-11-09 10:52:37,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:52:37,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-11-09 10:52:37,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 432. [2021-11-09 10:52:37,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 395 states have (on average 1.3620253164556961) internal successors, (538), 428 states have internal predecessors, (538), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:52:37,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 541 transitions. [2021-11-09 10:52:37,977 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 541 transitions. Word has length 72 [2021-11-09 10:52:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:37,977 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 541 transitions. [2021-11-09 10:52:37,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 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) [2021-11-09 10:52:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 541 transitions. [2021-11-09 10:52:37,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 10:52:37,979 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:37,979 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:37,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-11-09 10:52:37,981 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr50REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:52:37,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:37,982 INFO L85 PathProgramCache]: Analyzing trace with hash -884126576, now seen corresponding path program 1 times [2021-11-09 10:52:37,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:37,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786449884] [2021-11-09 10:52:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:37,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:38,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:52:38,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 10:52:38,270 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:38,270 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786449884] [2021-11-09 10:52:38,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786449884] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:52:38,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:52:38,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:52:38,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612427617] [2021-11-09 10:52:38,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:52:38,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:38,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:52:38,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:52:38,273 INFO L87 Difference]: Start difference. First operand 432 states and 541 transitions. Second operand has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 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) [2021-11-09 10:52:39,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:52:39,098 INFO L93 Difference]: Finished difference Result 508 states and 601 transitions. [2021-11-09 10:52:39,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:52:39,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 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 72 [2021-11-09 10:52:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:52:39,101 INFO L225 Difference]: With dead ends: 508 [2021-11-09 10:52:39,101 INFO L226 Difference]: Without dead ends: 508 [2021-11-09 10:52:39,101 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:52:39,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 508 states. [2021-11-09 10:52:39,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 508 to 434. [2021-11-09 10:52:39,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 397 states have (on average 1.3375314861460956) internal successors, (531), 430 states have internal predecessors, (531), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:52:39,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 534 transitions. [2021-11-09 10:52:39,112 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 534 transitions. Word has length 72 [2021-11-09 10:52:39,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:52:39,113 INFO L470 AbstractCegarLoop]: Abstraction has 434 states and 534 transitions. [2021-11-09 10:52:39,113 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 7.857142857142857) internal successors, (55), 7 states have internal predecessors, (55), 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) [2021-11-09 10:52:39,113 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 534 transitions. [2021-11-09 10:52:39,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-09 10:52:39,114 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:52:39,115 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:52:39,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-11-09 10:52:39,115 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr37REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:52:39,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:52:39,116 INFO L85 PathProgramCache]: Analyzing trace with hash -884125773, now seen corresponding path program 1 times [2021-11-09 10:52:39,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:52:39,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604427373] [2021-11-09 10:52:39,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:39,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:52:39,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:40,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:52:40,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:40,497 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:40,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:52:40,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604427373] [2021-11-09 10:52:40,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604427373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:40,498 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475167807] [2021-11-09 10:52:40,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:52:40,498 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:52:40,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:52:40,499 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:52:40,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-09 10:52:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:52:42,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-09 10:52:42,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:52:42,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:52:42,271 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:52:42,272 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:52:42,343 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 11 treesize of output 7 [2021-11-09 10:52:42,347 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 11 treesize of output 7 [2021-11-09 10:52:42,471 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:52:42,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:52:42,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:42,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:52:42,538 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:52:42,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:52:42,548 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:42,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2021-11-09 10:52:42,606 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-09 10:52:42,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 10:52:42,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:52:42,806 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:52:42,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:52:42,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:52:42,968 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:42,977 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:52:42,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 80 treesize of output 65 [2021-11-09 10:52:42,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:52:42,992 INFO L354 Elim1Store]: treesize reduction 77, result has 16.3 percent of original size [2021-11-09 10:52:42,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 91 [2021-11-09 10:52:44,232 INFO L354 Elim1Store]: treesize reduction 180, result has 11.8 percent of original size [2021-11-09 10:52:44,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 9 case distinctions, treesize of input 159 treesize of output 117 [2021-11-09 10:52:44,289 INFO L354 Elim1Store]: treesize reduction 140, result has 13.6 percent of original size [2021-11-09 10:52:44,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 92 treesize of output 83 [2021-11-09 10:52:44,795 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:52:44,796 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 68 [2021-11-09 10:52:44,814 INFO L354 Elim1Store]: treesize reduction 60, result has 20.0 percent of original size [2021-11-09 10:52:44,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 59 treesize of output 61 [2021-11-09 10:52:44,969 INFO L354 Elim1Store]: treesize reduction 44, result has 2.2 percent of original size [2021-11-09 10:52:44,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 103 treesize of output 66 [2021-11-09 10:52:44,975 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-11-09 10:52:44,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 57 treesize of output 28 [2021-11-09 10:52:45,005 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:52:45,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475167807] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:52:45,006 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:52:45,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 21] total 44 [2021-11-09 10:52:45,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989957998] [2021-11-09 10:52:45,006 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-09 10:52:45,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:52:45,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-09 10:52:45,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2021-11-09 10:52:45,008 INFO L87 Difference]: Start difference. First operand 434 states and 534 transitions. Second operand has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 43 states have internal predecessors, (128), 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) [2021-11-09 10:53:07,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:07,135 INFO L93 Difference]: Finished difference Result 562 states and 667 transitions. [2021-11-09 10:53:07,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-09 10:53:07,135 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 43 states have internal predecessors, (128), 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 72 [2021-11-09 10:53:07,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:07,137 INFO L225 Difference]: With dead ends: 562 [2021-11-09 10:53:07,138 INFO L226 Difference]: Without dead ends: 562 [2021-11-09 10:53:07,138 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 15.1s TimeCoverageRelationStatistics Valid=695, Invalid=6275, Unknown=2, NotChecked=0, Total=6972 [2021-11-09 10:53:07,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 562 states. [2021-11-09 10:53:07,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 562 to 427. [2021-11-09 10:53:07,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 390 states have (on average 1.3307692307692307) internal successors, (519), 423 states have internal predecessors, (519), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:53:07,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 522 transitions. [2021-11-09 10:53:07,146 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 522 transitions. Word has length 72 [2021-11-09 10:53:07,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:07,146 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 522 transitions. [2021-11-09 10:53:07,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.909090909090909) internal successors, (128), 43 states have internal predecessors, (128), 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) [2021-11-09 10:53:07,147 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 522 transitions. [2021-11-09 10:53:07,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:53:07,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:07,148 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:07,200 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:07,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:07,373 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting mainErr58ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:53:07,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:07,373 INFO L85 PathProgramCache]: Analyzing trace with hash -879296301, now seen corresponding path program 1 times [2021-11-09 10:53:07,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:07,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300758493] [2021-11-09 10:53:07,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:07,374 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:07,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:08,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:53:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:08,110 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:53:08,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:08,110 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300758493] [2021-11-09 10:53:08,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300758493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:08,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419226514] [2021-11-09 10:53:08,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:08,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:08,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:08,113 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:08,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-09 10:53:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:09,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-09 10:53:09,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:09,947 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:53:09,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:53:10,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 17 [2021-11-09 10:53:10,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-09 10:53:10,191 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:53:10,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 10:53:10,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:53:10,378 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:53:10,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:53:10,431 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:53:10,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:53:10,677 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:10,698 INFO L354 Elim1Store]: treesize reduction 28, result has 49.1 percent of original size [2021-11-09 10:53:10,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 43 [2021-11-09 10:53:10,826 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:10,843 INFO L354 Elim1Store]: treesize reduction 24, result has 45.5 percent of original size [2021-11-09 10:53:10,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 51 [2021-11-09 10:53:10,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:10,956 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:10,972 INFO L354 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2021-11-09 10:53:10,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 50 treesize of output 54 [2021-11-09 10:53:11,594 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 25 treesize of output 17 [2021-11-09 10:53:11,947 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:11,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:11,994 INFO L354 Elim1Store]: treesize reduction 136, result has 20.0 percent of original size [2021-11-09 10:53:11,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 90 treesize of output 80 [2021-11-09 10:53:13,757 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:13,758 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:13,810 INFO L354 Elim1Store]: treesize reduction 200, result has 13.8 percent of original size [2021-11-09 10:53:13,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 72 treesize of output 74 [2021-11-09 10:53:14,528 INFO L354 Elim1Store]: treesize reduction 73, result has 27.7 percent of original size [2021-11-09 10:53:14,528 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 74 treesize of output 72 [2021-11-09 10:53:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:53:14,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419226514] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:14,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:14,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 41 [2021-11-09 10:53:14,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783512550] [2021-11-09 10:53:14,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-09 10:53:14,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:14,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-09 10:53:14,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1562, Unknown=0, NotChecked=0, Total=1722 [2021-11-09 10:53:14,696 INFO L87 Difference]: Start difference. First operand 427 states and 522 transitions. Second operand has 42 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 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) [2021-11-09 10:53:41,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:53:41,621 INFO L93 Difference]: Finished difference Result 643 states and 758 transitions. [2021-11-09 10:53:41,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-09 10:53:41,622 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 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 73 [2021-11-09 10:53:41,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:53:41,624 INFO L225 Difference]: With dead ends: 643 [2021-11-09 10:53:41,624 INFO L226 Difference]: Without dead ends: 643 [2021-11-09 10:53:41,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=858, Invalid=6798, Unknown=0, NotChecked=0, Total=7656 [2021-11-09 10:53:41,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-11-09 10:53:41,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 443. [2021-11-09 10:53:41,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 406 states have (on average 1.3374384236453203) internal successors, (543), 439 states have internal predecessors, (543), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:53:41,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 546 transitions. [2021-11-09 10:53:41,633 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 546 transitions. Word has length 73 [2021-11-09 10:53:41,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:53:41,633 INFO L470 AbstractCegarLoop]: Abstraction has 443 states and 546 transitions. [2021-11-09 10:53:41,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.926829268292683) internal successors, (120), 41 states have internal predecessors, (120), 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) [2021-11-09 10:53:41,634 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 546 transitions. [2021-11-09 10:53:41,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:53:41,635 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:53:41,635 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:53:41,676 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-09 10:53:41,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-11-09 10:53:41,861 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:53:41,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:53:41,861 INFO L85 PathProgramCache]: Analyzing trace with hash -880435336, now seen corresponding path program 1 times [2021-11-09 10:53:41,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:53:41,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176575917] [2021-11-09 10:53:41,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:41,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:53:41,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:42,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:53:42,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:42,698 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:53:42,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:53:42,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176575917] [2021-11-09 10:53:42,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176575917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:42,699 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606588253] [2021-11-09 10:53:42,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:53:42,699 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:53:42,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:53:42,702 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:53:42,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-09 10:53:44,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:53:44,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-09 10:53:44,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:53:44,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:53:44,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:53:44,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:53:44,619 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2021-11-09 10:53:44,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-09 10:53:44,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2021-11-09 10:53:44,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-09 10:53:44,713 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:53:44,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 10:53:44,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:53:44,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:53:44,861 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:53:44,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:53:44,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:44,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:53:44,912 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:53:44,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:53:44,919 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:53:44,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:53:45,108 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:45,128 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-11-09 10:53:45,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-09 10:53:45,146 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:45,163 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 10:53:45,163 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-11-09 10:53:45,287 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:45,295 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:53:45,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 41 treesize of output 39 [2021-11-09 10:53:45,317 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:45,326 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:53:45,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 31 [2021-11-09 10:53:45,444 INFO L354 Elim1Store]: treesize reduction 142, result has 22.0 percent of original size [2021-11-09 10:53:45,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 122 treesize of output 120 [2021-11-09 10:53:45,483 INFO L354 Elim1Store]: treesize reduction 116, result has 24.7 percent of original size [2021-11-09 10:53:45,483 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 188 treesize of output 170 [2021-11-09 10:53:46,973 INFO L354 Elim1Store]: treesize reduction 278, result has 11.2 percent of original size [2021-11-09 10:53:46,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 14 case distinctions, treesize of input 314 treesize of output 201 [2021-11-09 10:53:47,017 INFO L354 Elim1Store]: treesize reduction 208, result has 10.7 percent of original size [2021-11-09 10:53:47,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 14 case distinctions, treesize of input 230 treesize of output 150 [2021-11-09 10:53:48,496 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:48,533 INFO L354 Elim1Store]: treesize reduction 156, result has 17.5 percent of original size [2021-11-09 10:53:48,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 140 [2021-11-09 10:53:48,538 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:53:48,572 INFO L354 Elim1Store]: treesize reduction 156, result has 17.5 percent of original size [2021-11-09 10:53:48,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 134 treesize of output 125 [2021-11-09 10:53:49,194 INFO L354 Elim1Store]: treesize reduction 69, result has 18.8 percent of original size [2021-11-09 10:53:49,194 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 168 treesize of output 139 [2021-11-09 10:53:50,530 INFO L354 Elim1Store]: treesize reduction 65, result has 30.1 percent of original size [2021-11-09 10:53:50,530 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 8 new quantified variables, introduced 10 case distinctions, treesize of input 85 treesize of output 69 [2021-11-09 10:53:50,556 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:53:50,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606588253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:53:50,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:53:50,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 46 [2021-11-09 10:53:50,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015773147] [2021-11-09 10:53:50,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-09 10:53:50,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:53:50,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-09 10:53:50,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=1923, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 10:53:50,558 INFO L87 Difference]: Start difference. First operand 443 states and 546 transitions. Second operand has 47 states, 46 states have (on average 2.739130434782609) internal successors, (126), 46 states have internal predecessors, (126), 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) [2021-11-09 10:54:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:08,404 INFO L93 Difference]: Finished difference Result 488 states and 593 transitions. [2021-11-09 10:54:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-09 10:54:08,405 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.739130434782609) internal successors, (126), 46 states have internal predecessors, (126), 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 73 [2021-11-09 10:54:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:08,407 INFO L225 Difference]: With dead ends: 488 [2021-11-09 10:54:08,407 INFO L226 Difference]: Without dead ends: 488 [2021-11-09 10:54:08,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1490 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=636, Invalid=4620, Unknown=0, NotChecked=0, Total=5256 [2021-11-09 10:54:08,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-09 10:54:08,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 446. [2021-11-09 10:54:08,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 446 states, 409 states have (on average 1.337408312958435) internal successors, (547), 442 states have internal predecessors, (547), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 446 states to 446 states and 550 transitions. [2021-11-09 10:54:08,416 INFO L78 Accepts]: Start accepts. Automaton has 446 states and 550 transitions. Word has length 73 [2021-11-09 10:54:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:08,417 INFO L470 AbstractCegarLoop]: Abstraction has 446 states and 550 transitions. [2021-11-09 10:54:08,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.739130434782609) internal successors, (126), 46 states have internal predecessors, (126), 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) [2021-11-09 10:54:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 446 states and 550 transitions. [2021-11-09 10:54:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:54:08,419 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:08,419 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:08,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:08,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-09 10:54:08,645 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting mainErr25REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:54:08,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:08,645 INFO L85 PathProgramCache]: Analyzing trace with hash -880435335, now seen corresponding path program 1 times [2021-11-09 10:54:08,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:08,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254835167] [2021-11-09 10:54:08,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:08,645 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:08,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:09,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:54:09,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:09,393 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:09,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:09,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254835167] [2021-11-09 10:54:09,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254835167] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:09,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104549230] [2021-11-09 10:54:09,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:09,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:09,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:54:09,394 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:54:09,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-09 10:54:11,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:11,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 10:54:11,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:11,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:54:11,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:54:11,505 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:54:11,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2021-11-09 10:54:11,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-09 10:54:11,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2021-11-09 10:54:11,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 18 [2021-11-09 10:54:11,713 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-09 10:54:11,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-11-09 10:54:11,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:54:11,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:54:11,887 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:54:11,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:54:11,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:11,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:54:11,938 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:54:11,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:54:11,945 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:11,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:54:12,115 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:12,135 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-11-09 10:54:12,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 28 [2021-11-09 10:54:12,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:12,186 INFO L354 Elim1Store]: treesize reduction 32, result has 41.8 percent of original size [2021-11-09 10:54:12,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 36 [2021-11-09 10:54:12,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:12,323 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:54:12,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 45 treesize of output 39 [2021-11-09 10:54:12,341 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:12,350 INFO L354 Elim1Store]: treesize reduction 37, result has 15.9 percent of original size [2021-11-09 10:54:12,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 37 treesize of output 31 [2021-11-09 10:54:12,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:12,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:12,452 INFO L354 Elim1Store]: treesize reduction 49, result has 23.4 percent of original size [2021-11-09 10:54:12,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 98 treesize of output 90 [2021-11-09 10:54:12,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:12,456 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:12,473 INFO L354 Elim1Store]: treesize reduction 93, result has 27.3 percent of original size [2021-11-09 10:54:12,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 134 treesize of output 155 [2021-11-09 10:54:13,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:13,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:13,887 INFO L354 Elim1Store]: treesize reduction 148, result has 12.9 percent of original size [2021-11-09 10:54:13,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 224 treesize of output 145 [2021-11-09 10:54:13,892 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:13,892 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:13,923 INFO L354 Elim1Store]: treesize reduction 180, result has 10.9 percent of original size [2021-11-09 10:54:13,923 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 144 treesize of output 127 [2021-11-09 10:54:15,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:15,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:15,678 INFO L354 Elim1Store]: treesize reduction 156, result has 17.5 percent of original size [2021-11-09 10:54:15,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 149 treesize of output 136 [2021-11-09 10:54:15,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:15,698 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:15,744 INFO L354 Elim1Store]: treesize reduction 156, result has 17.5 percent of original size [2021-11-09 10:54:15,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 138 treesize of output 133 [2021-11-09 10:54:18,284 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:18,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:18,318 INFO L354 Elim1Store]: treesize reduction 24, result has 57.9 percent of original size [2021-11-09 10:54:18,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 136 treesize of output 123 [2021-11-09 10:54:18,322 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:18,323 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:18,335 INFO L354 Elim1Store]: treesize reduction 33, result has 26.7 percent of original size [2021-11-09 10:54:18,336 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 114 treesize of output 89 [2021-11-09 10:54:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:18,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104549230] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:18,423 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:54:18,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 43 [2021-11-09 10:54:18,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407431970] [2021-11-09 10:54:18,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-09 10:54:18,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:18,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-09 10:54:18,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1600, Unknown=0, NotChecked=0, Total=1806 [2021-11-09 10:54:18,424 INFO L87 Difference]: Start difference. First operand 446 states and 550 transitions. Second operand has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 42 states have internal predecessors, (123), 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) [2021-11-09 10:54:28,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:28,107 INFO L93 Difference]: Finished difference Result 477 states and 581 transitions. [2021-11-09 10:54:28,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-09 10:54:28,108 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 42 states have internal predecessors, (123), 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 73 [2021-11-09 10:54:28,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:28,110 INFO L225 Difference]: With dead ends: 477 [2021-11-09 10:54:28,110 INFO L226 Difference]: Without dead ends: 477 [2021-11-09 10:54:28,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=536, Invalid=3624, Unknown=0, NotChecked=0, Total=4160 [2021-11-09 10:54:28,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 477 states. [2021-11-09 10:54:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 477 to 442. [2021-11-09 10:54:28,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 405 states have (on average 1.3358024691358024) internal successors, (541), 438 states have internal predecessors, (541), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:28,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 544 transitions. [2021-11-09 10:54:28,117 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 544 transitions. Word has length 73 [2021-11-09 10:54:28,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:28,118 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 544 transitions. [2021-11-09 10:54:28,118 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.86046511627907) internal successors, (123), 42 states have internal predecessors, (123), 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) [2021-11-09 10:54:28,118 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 544 transitions. [2021-11-09 10:54:28,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:54:28,119 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:28,119 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:28,160 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-09 10:54:28,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-09 10:54:28,337 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting mainErr51REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:54:28,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:28,337 INFO L85 PathProgramCache]: Analyzing trace with hash 1314706227, now seen corresponding path program 1 times [2021-11-09 10:54:28,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:28,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418455036] [2021-11-09 10:54:28,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:28,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:28,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:28,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:54:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 10:54:28,439 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:28,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418455036] [2021-11-09 10:54:28,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418455036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:28,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:28,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:54:28,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44807998] [2021-11-09 10:54:28,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:54:28,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:28,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:54:28,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:54:28,441 INFO L87 Difference]: Start difference. First operand 442 states and 544 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2021-11-09 10:54:28,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:28,817 INFO L93 Difference]: Finished difference Result 472 states and 560 transitions. [2021-11-09 10:54:28,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-09 10:54:28,818 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 73 [2021-11-09 10:54:28,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:28,820 INFO L225 Difference]: With dead ends: 472 [2021-11-09 10:54:28,820 INFO L226 Difference]: Without dead ends: 472 [2021-11-09 10:54:28,820 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-11-09 10:54:28,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2021-11-09 10:54:28,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 442. [2021-11-09 10:54:28,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 405 states have (on average 1.3111111111111111) internal successors, (531), 438 states have internal predecessors, (531), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:28,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 534 transitions. [2021-11-09 10:54:28,826 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 534 transitions. Word has length 73 [2021-11-09 10:54:28,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:28,827 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 534 transitions. [2021-11-09 10:54:28,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2021-11-09 10:54:28,827 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 534 transitions. [2021-11-09 10:54:28,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-11-09 10:54:28,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:28,828 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:28,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-11-09 10:54:28,828 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting mainErr52REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:54:28,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:28,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1314706228, now seen corresponding path program 1 times [2021-11-09 10:54:28,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:28,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944773806] [2021-11-09 10:54:28,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:28,829 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:28,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:54:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-09 10:54:28,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:28,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944773806] [2021-11-09 10:54:28,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944773806] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-09 10:54:28,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-09 10:54:28,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-11-09 10:54:28,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637793300] [2021-11-09 10:54:28,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-09 10:54:28,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:28,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-09 10:54:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-09 10:54:28,982 INFO L87 Difference]: Start difference. First operand 442 states and 534 transitions. Second operand has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2021-11-09 10:54:29,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:29,560 INFO L93 Difference]: Finished difference Result 473 states and 550 transitions. [2021-11-09 10:54:29,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-09 10:54:29,561 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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 73 [2021-11-09 10:54:29,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:29,563 INFO L225 Difference]: With dead ends: 473 [2021-11-09 10:54:29,563 INFO L226 Difference]: Without dead ends: 473 [2021-11-09 10:54:29,563 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-11-09 10:54:29,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2021-11-09 10:54:29,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 411. [2021-11-09 10:54:29,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 379 states have (on average 1.266490765171504) internal successors, (480), 407 states have internal predecessors, (480), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 483 transitions. [2021-11-09 10:54:29,570 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 483 transitions. Word has length 73 [2021-11-09 10:54:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:29,570 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 483 transitions. [2021-11-09 10:54:29,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 8.0) internal successors, (56), 7 states have internal predecessors, (56), 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) [2021-11-09 10:54:29,570 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 483 transitions. [2021-11-09 10:54:29,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-09 10:54:29,572 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:29,572 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:29,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-11-09 10:54:29,572 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting mainErr60REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:54:29,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:29,573 INFO L85 PathProgramCache]: Analyzing trace with hash -110318232, now seen corresponding path program 1 times [2021-11-09 10:54:29,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:29,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097667630] [2021-11-09 10:54:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:29,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:29,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:30,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:54:30,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:30,163 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:30,164 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:30,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097667630] [2021-11-09 10:54:30,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097667630] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:30,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983406338] [2021-11-09 10:54:30,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:30,164 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:30,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:54:30,165 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:54:30,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-09 10:54:32,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:32,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-09 10:54:32,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:32,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:54:32,403 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:54:32,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:54:32,455 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 11 treesize of output 7 [2021-11-09 10:54:32,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2021-11-09 10:54:32,673 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:54:32,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 10:54:32,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-11-09 10:54:32,909 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:54:32,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 41 [2021-11-09 10:54:32,980 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:54:32,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 41 [2021-11-09 10:54:33,106 INFO L354 Elim1Store]: treesize reduction 66, result has 35.3 percent of original size [2021-11-09 10:54:33,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 31 treesize of output 53 [2021-11-09 10:54:33,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:33,432 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:33,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 63 treesize of output 52 [2021-11-09 10:54:33,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:33,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 55 [2021-11-09 10:54:33,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:33,752 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:33,771 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-11-09 10:54:33,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 109 treesize of output 84 [2021-11-09 10:54:34,801 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 7 treesize of output 3 [2021-11-09 10:54:35,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:35,265 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:35,266 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:35,309 INFO L354 Elim1Store]: treesize reduction 192, result has 10.3 percent of original size [2021-11-09 10:54:35,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 153 treesize of output 98 [2021-11-09 10:54:35,768 INFO L354 Elim1Store]: treesize reduction 106, result has 15.9 percent of original size [2021-11-09 10:54:35,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 8 case distinctions, treesize of input 94 treesize of output 100 [2021-11-09 10:54:36,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:36,158 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:36,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:36,160 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:36,195 INFO L354 Elim1Store]: treesize reduction 196, result has 8.4 percent of original size [2021-11-09 10:54:36,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 17 case distinctions, treesize of input 112 treesize of output 86 [2021-11-09 10:54:36,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~data~0.offset] [2021-11-09 10:54:36,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:54:36,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2021-11-09 10:54:36,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913085892] [2021-11-09 10:54:36,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-09 10:54:36,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:36,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-09 10:54:36,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=1984, Unknown=0, NotChecked=0, Total=2162 [2021-11-09 10:54:36,732 INFO L87 Difference]: Start difference. First operand 411 states and 483 transitions. Second operand has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 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) [2021-11-09 10:54:37,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:54:37,816 INFO L93 Difference]: Finished difference Result 405 states and 458 transitions. [2021-11-09 10:54:37,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-09 10:54:37,816 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 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 76 [2021-11-09 10:54:37,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:54:37,818 INFO L225 Difference]: With dead ends: 405 [2021-11-09 10:54:37,818 INFO L226 Difference]: Without dead ends: 403 [2021-11-09 10:54:37,818 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1107 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=359, Invalid=3931, Unknown=0, NotChecked=0, Total=4290 [2021-11-09 10:54:37,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-11-09 10:54:37,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 354. [2021-11-09 10:54:37,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 322 states have (on average 1.2732919254658386) internal successors, (410), 350 states have internal predecessors, (410), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:54:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 413 transitions. [2021-11-09 10:54:37,825 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 413 transitions. Word has length 76 [2021-11-09 10:54:37,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:54:37,826 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 413 transitions. [2021-11-09 10:54:37,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4761904761904763) internal successors, (73), 20 states have internal predecessors, (73), 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) [2021-11-09 10:54:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 413 transitions. [2021-11-09 10:54:37,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 10:54:37,827 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:54:37,827 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:54:37,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-09 10:54:38,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-09 10:54:38,041 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:54:38,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:54:38,041 INFO L85 PathProgramCache]: Analyzing trace with hash -366342901, now seen corresponding path program 1 times [2021-11-09 10:54:38,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:54:38,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950030457] [2021-11-09 10:54:38,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:38,042 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:54:38,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:38,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:54:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:38,779 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:38,779 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:54:38,779 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950030457] [2021-11-09 10:54:38,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950030457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:38,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512950182] [2021-11-09 10:54:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:54:38,780 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:54:38,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:54:38,780 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:54:38,782 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-09 10:54:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:54:41,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-09 10:54:41,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:54:41,142 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:54:41,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:54:41,188 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:54:41,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:54:41,369 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:54:41,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:54:41,387 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:54:41,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:54:41,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:54:41,609 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:54:41,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:54:41,677 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:54:41,677 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:54:41,762 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-11-09 10:54:41,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-11-09 10:54:41,789 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-09 10:54:41,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 10:54:42,000 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:42,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-09 10:54:42,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-11-09 10:54:42,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:42,269 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:42,281 INFO L354 Elim1Store]: treesize reduction 57, result has 10.9 percent of original size [2021-11-09 10:54:42,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 60 [2021-11-09 10:54:43,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:43,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:43,152 INFO L354 Elim1Store]: treesize reduction 148, result has 12.9 percent of original size [2021-11-09 10:54:43,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 104 treesize of output 70 [2021-11-09 10:54:44,007 INFO L354 Elim1Store]: treesize reduction 32, result has 47.5 percent of original size [2021-11-09 10:54:44,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 82 treesize of output 98 [2021-11-09 10:54:44,893 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-09 10:54:44,905 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:44,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:44,908 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:44,908 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:44,941 INFO L354 Elim1Store]: treesize reduction 156, result has 12.4 percent of original size [2021-11-09 10:54:44,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 88 treesize of output 90 [2021-11-09 10:54:46,028 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 119 treesize of output 107 [2021-11-09 10:54:47,733 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:54:47,734 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:54:47,819 INFO L354 Elim1Store]: treesize reduction 272, result has 16.8 percent of original size [2021-11-09 10:54:47,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 21 case distinctions, treesize of input 121 treesize of output 125 [2021-11-09 10:54:58,170 INFO L354 Elim1Store]: treesize reduction 144, result has 16.8 percent of original size [2021-11-09 10:54:58,170 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 8 new quantified variables, introduced 15 case distinctions, treesize of input 152 treesize of output 118 [2021-11-09 10:54:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:54:58,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512950182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:54:58,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:54:58,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 51 [2021-11-09 10:54:58,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122531462] [2021-11-09 10:54:58,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 10:54:58,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:54:58,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 10:54:58,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=2410, Unknown=1, NotChecked=0, Total=2652 [2021-11-09 10:54:58,370 INFO L87 Difference]: Start difference. First operand 354 states and 413 transitions. Second operand has 52 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 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) [2021-11-09 10:56:14,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:56:14,213 INFO L93 Difference]: Finished difference Result 401 states and 461 transitions. [2021-11-09 10:56:14,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-09 10:56:14,213 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 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 77 [2021-11-09 10:56:14,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:56:14,215 INFO L225 Difference]: With dead ends: 401 [2021-11-09 10:56:14,215 INFO L226 Difference]: Without dead ends: 401 [2021-11-09 10:56:14,216 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 56 SyntacticMatches, 5 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 45.1s TimeCoverageRelationStatistics Valid=806, Invalid=6319, Unknown=15, NotChecked=0, Total=7140 [2021-11-09 10:56:14,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 401 states. [2021-11-09 10:56:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 401 to 388. [2021-11-09 10:56:14,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 356 states have (on average 1.252808988764045) internal successors, (446), 384 states have internal predecessors, (446), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:56:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 449 transitions. [2021-11-09 10:56:14,223 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 449 transitions. Word has length 77 [2021-11-09 10:56:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:56:14,223 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 449 transitions. [2021-11-09 10:56:14,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.607843137254902) internal successors, (133), 51 states have internal predecessors, (133), 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) [2021-11-09 10:56:14,224 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 449 transitions. [2021-11-09 10:56:14,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-09 10:56:14,225 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:56:14,225 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:56:14,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-09 10:56:14,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-09 10:56:14,433 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:56:14,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:56:14,433 INFO L85 PathProgramCache]: Analyzing trace with hash -366342900, now seen corresponding path program 1 times [2021-11-09 10:56:14,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:56:14,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84242251] [2021-11-09 10:56:14,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:56:14,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:56:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:56:16,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:56:16,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:56:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:56:16,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:56:16,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84242251] [2021-11-09 10:56:16,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84242251] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:56:16,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104613997] [2021-11-09 10:56:16,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:56:16,386 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:56:16,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:56:16,387 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:56:16,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-09 10:56:18,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:56:18,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-09 10:56:18,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:56:18,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:56:19,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:56:19,065 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 11 treesize of output 7 [2021-11-09 10:56:19,075 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 11 treesize of output 7 [2021-11-09 10:56:19,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 32 [2021-11-09 10:56:19,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:56:19,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:56:19,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 24 [2021-11-09 10:56:19,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 21 [2021-11-09 10:56:19,143 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:56:19,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:56:19,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 20 [2021-11-09 10:56:19,229 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:56:19,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:56:19,249 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:56:19,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:56:19,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 22 [2021-11-09 10:56:19,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:56:19,532 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:56:19,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 25 [2021-11-09 10:56:19,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:56:19,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:56:19,662 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:56:19,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:56:19,671 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:56:19,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 42 treesize of output 25 [2021-11-09 10:56:19,733 INFO L354 Elim1Store]: treesize reduction 28, result has 28.2 percent of original size [2021-11-09 10:56:19,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 22 [2021-11-09 10:56:19,756 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-09 10:56:19,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 10:56:20,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 32 [2021-11-09 10:56:20,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-09 10:56:20,214 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-11-09 10:56:20,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 35 [2021-11-09 10:56:20,362 INFO L354 Elim1Store]: treesize reduction 57, result has 10.9 percent of original size [2021-11-09 10:56:20,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 116 treesize of output 92 [2021-11-09 10:56:20,375 INFO L354 Elim1Store]: treesize reduction 113, result has 11.7 percent of original size [2021-11-09 10:56:20,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 137 treesize of output 138 [2021-11-09 10:56:21,540 INFO L354 Elim1Store]: treesize reduction 148, result has 12.9 percent of original size [2021-11-09 10:56:21,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 8 new quantified variables, introduced 13 case distinctions, treesize of input 172 treesize of output 117 [2021-11-09 10:56:21,575 INFO L354 Elim1Store]: treesize reduction 176, result has 12.9 percent of original size [2021-11-09 10:56:21,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 112 treesize of output 115 [2021-11-09 10:56:23,030 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:56:23,031 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:56:23,079 INFO L354 Elim1Store]: treesize reduction 176, result has 12.9 percent of original size [2021-11-09 10:56:23,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 129 treesize of output 139 [2021-11-09 10:56:23,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:56:23,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:56:23,122 INFO L354 Elim1Store]: treesize reduction 180, result has 10.9 percent of original size [2021-11-09 10:56:23,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 125 treesize of output 119 [2021-11-09 10:56:24,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:56:24,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:56:25,038 INFO L354 Elim1Store]: treesize reduction 320, result has 21.0 percent of original size [2021-11-09 10:56:25,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 20 case distinctions, treesize of input 205 treesize of output 209 [2021-11-09 10:56:25,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:56:25,049 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:56:25,126 INFO L354 Elim1Store]: treesize reduction 360, result has 14.9 percent of original size [2021-11-09 10:56:25,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 20 case distinctions, treesize of input 244 treesize of output 243 [2021-11-09 10:56:30,689 INFO L354 Elim1Store]: treesize reduction 185, result has 11.5 percent of original size [2021-11-09 10:56:30,690 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 15 case distinctions, treesize of input 323 treesize of output 262 [2021-11-09 10:56:30,741 INFO L354 Elim1Store]: treesize reduction 172, result has 10.9 percent of original size [2021-11-09 10:56:30,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 21 case distinctions, treesize of input 253 treesize of output 138 [2021-11-09 10:56:31,064 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:56:31,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104613997] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:56:31,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:56:31,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29] total 58 [2021-11-09 10:56:31,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360143744] [2021-11-09 10:56:31,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 10:56:31,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:56:31,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 10:56:31,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=414, Invalid=3008, Unknown=0, NotChecked=0, Total=3422 [2021-11-09 10:56:31,066 INFO L87 Difference]: Start difference. First operand 388 states and 449 transitions. Second operand has 59 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 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) [2021-11-09 10:56:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:56:57,015 INFO L93 Difference]: Finished difference Result 492 states and 570 transitions. [2021-11-09 10:56:57,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-09 10:56:57,015 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 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 77 [2021-11-09 10:56:57,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:56:57,017 INFO L225 Difference]: With dead ends: 492 [2021-11-09 10:56:57,017 INFO L226 Difference]: Without dead ends: 492 [2021-11-09 10:56:57,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 52 SyntacticMatches, 6 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2588 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=1181, Invalid=7743, Unknown=6, NotChecked=0, Total=8930 [2021-11-09 10:56:57,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-11-09 10:56:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 393. [2021-11-09 10:56:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 361 states have (on average 1.2493074792243768) internal successors, (451), 389 states have internal predecessors, (451), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:56:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 454 transitions. [2021-11-09 10:56:57,024 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 454 transitions. Word has length 77 [2021-11-09 10:56:57,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:56:57,024 INFO L470 AbstractCegarLoop]: Abstraction has 393 states and 454 transitions. [2021-11-09 10:56:57,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.2413793103448274) internal successors, (130), 58 states have internal predecessors, (130), 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) [2021-11-09 10:56:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 454 transitions. [2021-11-09 10:56:57,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 10:56:57,026 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:56:57,026 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:56:57,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-09 10:56:57,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:56:57,249 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting mainErr18REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:56:57,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:56:57,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1170743184, now seen corresponding path program 1 times [2021-11-09 10:56:57,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:56:57,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999012074] [2021-11-09 10:56:57,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:56:57,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:56:57,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:56:57,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:56:57,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:56:57,987 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:56:57,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:56:57,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999012074] [2021-11-09 10:56:57,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999012074] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:56:57,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743198865] [2021-11-09 10:56:57,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:56:57,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:56:57,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:56:57,990 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:56:57,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-09 10:57:00,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:57:00,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-09 10:57:00,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:57:00,808 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:57:00,864 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:57:00,865 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:57:00,916 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 11 treesize of output 7 [2021-11-09 10:57:01,022 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 28 treesize of output 27 [2021-11-09 10:57:01,138 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:57:01,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 10:57:01,246 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-11-09 10:57:01,380 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:57:01,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 41 [2021-11-09 10:57:01,449 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:57:01,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 41 [2021-11-09 10:57:01,587 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-11-09 10:57:01,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2021-11-09 10:57:01,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:01,799 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:01,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-09 10:57:01,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:01,957 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2021-11-09 10:57:02,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:02,061 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:02,080 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-11-09 10:57:02,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 86 treesize of output 69 [2021-11-09 10:57:03,038 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:03,038 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:03,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:03,041 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:03,087 INFO L354 Elim1Store]: treesize reduction 219, result has 9.1 percent of original size [2021-11-09 10:57:03,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 24 case distinctions, treesize of input 119 treesize of output 87 [2021-11-09 10:57:04,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:04,012 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:04,014 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:04,015 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:04,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:04,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:04,091 INFO L354 Elim1Store]: treesize reduction 214, result has 12.7 percent of original size [2021-11-09 10:57:04,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 97 treesize of output 90 [2021-11-09 10:57:05,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:05,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:05,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:05,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:05,191 INFO L354 Elim1Store]: treesize reduction 364, result has 11.7 percent of original size [2021-11-09 10:57:05,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 2 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 27 case distinctions, treesize of input 123 treesize of output 104 [2021-11-09 10:57:05,536 INFO L354 Elim1Store]: treesize reduction 117, result has 3.3 percent of original size [2021-11-09 10:57:05,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 10 case distinctions, treesize of input 129 treesize of output 57 [2021-11-09 10:57:05,544 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:57:05,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743198865] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:57:05,544 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:57:05,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 51 [2021-11-09 10:57:05,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831863959] [2021-11-09 10:57:05,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-09 10:57:05,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:57:05,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-09 10:57:05,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=2423, Unknown=0, NotChecked=0, Total=2652 [2021-11-09 10:57:05,546 INFO L87 Difference]: Start difference. First operand 393 states and 454 transitions. Second operand has 52 states, 51 states have (on average 2.823529411764706) internal successors, (144), 51 states have internal predecessors, (144), 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) [2021-11-09 10:57:30,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:57:30,380 INFO L93 Difference]: Finished difference Result 437 states and 502 transitions. [2021-11-09 10:57:30,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-09 10:57:30,381 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 2.823529411764706) internal successors, (144), 51 states have internal predecessors, (144), 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 78 [2021-11-09 10:57:30,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:57:30,383 INFO L225 Difference]: With dead ends: 437 [2021-11-09 10:57:30,383 INFO L226 Difference]: Without dead ends: 437 [2021-11-09 10:57:30,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2763 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1040, Invalid=8076, Unknown=4, NotChecked=0, Total=9120 [2021-11-09 10:57:30,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2021-11-09 10:57:30,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 407. [2021-11-09 10:57:30,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 375 states have (on average 1.2426666666666666) internal successors, (466), 403 states have internal predecessors, (466), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:57:30,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 469 transitions. [2021-11-09 10:57:30,391 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 469 transitions. Word has length 78 [2021-11-09 10:57:30,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:57:30,391 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 469 transitions. [2021-11-09 10:57:30,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 2.823529411764706) internal successors, (144), 51 states have internal predecessors, (144), 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) [2021-11-09 10:57:30,392 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 469 transitions. [2021-11-09 10:57:30,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-09 10:57:30,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:57:30,393 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:57:30,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-09 10:57:30,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:57:30,617 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting mainErr19REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:57:30,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:57:30,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1170743183, now seen corresponding path program 1 times [2021-11-09 10:57:30,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:57:30,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889138249] [2021-11-09 10:57:30,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:57:30,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:57:30,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:57:32,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:57:32,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:57:32,592 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:57:32,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:57:32,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889138249] [2021-11-09 10:57:32,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889138249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:57:32,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918477617] [2021-11-09 10:57:32,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:57:32,592 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:57:32,593 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:57:32,593 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:57:32,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-09 10:57:35,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:57:35,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-09 10:57:35,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:57:35,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:57:35,656 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:57:35,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:57:35,742 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 11 treesize of output 7 [2021-11-09 10:57:35,747 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 11 treesize of output 7 [2021-11-09 10:57:35,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:57:35,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-09 10:57:36,121 INFO L354 Elim1Store]: treesize reduction 48, result has 36.0 percent of original size [2021-11-09 10:57:36,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 26 treesize of output 41 [2021-11-09 10:57:36,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:57:36,280 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2021-11-09 10:57:36,469 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:57:36,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 41 [2021-11-09 10:57:36,487 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:36,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:57:36,562 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:57:36,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:57:36,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:36,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 41 [2021-11-09 10:57:36,629 INFO L354 Elim1Store]: treesize reduction 12, result has 58.6 percent of original size [2021-11-09 10:57:36,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 29 [2021-11-09 10:57:36,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:36,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-09 10:57:36,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:36,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:36,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 47 [2021-11-09 10:57:37,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-11-09 10:57:37,195 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:37,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 50 [2021-11-09 10:57:37,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:37,328 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:37,366 INFO L354 Elim1Store]: treesize reduction 84, result has 15.2 percent of original size [2021-11-09 10:57:37,367 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 130 treesize of output 101 [2021-11-09 10:57:37,370 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:37,371 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:37,381 INFO L354 Elim1Store]: treesize reduction 113, result has 11.7 percent of original size [2021-11-09 10:57:37,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 151 treesize of output 152 [2021-11-09 10:57:38,684 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:38,684 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:38,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:38,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:38,736 INFO L354 Elim1Store]: treesize reduction 219, result has 9.1 percent of original size [2021-11-09 10:57:38,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 10 new quantified variables, introduced 24 case distinctions, treesize of input 187 treesize of output 134 [2021-11-09 10:57:38,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:38,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:38,782 INFO L354 Elim1Store]: treesize reduction 176, result has 12.9 percent of original size [2021-11-09 10:57:38,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 131 treesize of output 134 [2021-11-09 10:57:40,028 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:40,029 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:40,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:40,033 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:40,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:40,035 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:40,104 INFO L354 Elim1Store]: treesize reduction 246, result has 12.5 percent of original size [2021-11-09 10:57:40,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 3 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 23 case distinctions, treesize of input 145 treesize of output 134 [2021-11-09 10:57:40,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:40,119 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:40,120 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:40,154 INFO L354 Elim1Store]: treesize reduction 188, result has 10.5 percent of original size [2021-11-09 10:57:40,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 13 case distinctions, treesize of input 147 treesize of output 153 [2021-11-09 10:57:41,427 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:41,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-09 10:57:41,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:41,525 INFO L354 Elim1Store]: treesize reduction 396, result has 12.4 percent of original size [2021-11-09 10:57:41,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 28 case distinctions, treesize of input 182 treesize of output 155 [2021-11-09 10:57:41,536 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-09 10:57:41,573 INFO L354 Elim1Store]: treesize reduction 196, result has 14.4 percent of original size [2021-11-09 10:57:41,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 157 treesize of output 160 [2021-11-09 10:57:43,525 INFO L354 Elim1Store]: treesize reduction 249, result has 3.1 percent of original size [2021-11-09 10:57:43,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 7 select indices, 7 select index equivalence classes, 1 disjoint index pairs (out of 21 index pairs), introduced 9 new quantified variables, introduced 21 case distinctions, treesize of input 199 treesize of output 102 [2021-11-09 10:57:43,535 INFO L354 Elim1Store]: treesize reduction 60, result has 1.6 percent of original size [2021-11-09 10:57:43,535 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 5 new quantified variables, introduced 6 case distinctions, treesize of input 58 treesize of output 41 [2021-11-09 10:57:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:57:43,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918477617] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:57:43,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-09 10:57:43,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 27] total 58 [2021-11-09 10:57:43,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373256744] [2021-11-09 10:57:43,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-09 10:57:43,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:57:43,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-09 10:57:43,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=3162, Unknown=1, NotChecked=0, Total=3422 [2021-11-09 10:57:43,655 INFO L87 Difference]: Start difference. First operand 407 states and 469 transitions. Second operand has 59 states, 58 states have (on average 2.5172413793103448) internal successors, (146), 58 states have internal predecessors, (146), 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) [2021-11-09 10:58:37,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:58:37,146 INFO L93 Difference]: Finished difference Result 552 states and 638 transitions. [2021-11-09 10:58:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-09 10:58:37,147 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 58 states have (on average 2.5172413793103448) internal successors, (146), 58 states have internal predecessors, (146), 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 78 [2021-11-09 10:58:37,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:58:37,149 INFO L225 Difference]: With dead ends: 552 [2021-11-09 10:58:37,149 INFO L226 Difference]: Without dead ends: 552 [2021-11-09 10:58:37,150 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2843 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=1136, Invalid=9357, Unknown=13, NotChecked=0, Total=10506 [2021-11-09 10:58:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-11-09 10:58:37,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 403. [2021-11-09 10:58:37,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 371 states have (on average 1.2425876010781671) internal successors, (461), 399 states have internal predecessors, (461), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:58:37,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 464 transitions. [2021-11-09 10:58:37,155 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 464 transitions. Word has length 78 [2021-11-09 10:58:37,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:58:37,155 INFO L470 AbstractCegarLoop]: Abstraction has 403 states and 464 transitions. [2021-11-09 10:58:37,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 58 states have (on average 2.5172413793103448) internal successors, (146), 58 states have internal predecessors, (146), 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) [2021-11-09 10:58:37,155 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 464 transitions. [2021-11-09 10:58:37,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:58:37,156 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:58:37,157 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:58:37,204 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-09 10:58:37,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-09 10:58:37,381 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting mainErr58ASSERT_VIOLATIONMEMORY_FREE === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:58:37,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:58:37,381 INFO L85 PathProgramCache]: Analyzing trace with hash 646497095, now seen corresponding path program 1 times [2021-11-09 10:58:37,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:58:37,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433033066] [2021-11-09 10:58:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:58:37,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:58:37,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:58:38,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:58:38,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:58:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:58:38,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:58:38,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433033066] [2021-11-09 10:58:38,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433033066] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:58:38,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1053583328] [2021-11-09 10:58:38,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:58:38,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:58:38,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:58:38,687 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:58:38,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-09 10:58:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:58:41,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-09 10:58:41,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-09 10:58:41,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:58:41,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-09 10:58:42,058 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 11 treesize of output 7 [2021-11-09 10:58:42,171 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:58:42,293 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-09 10:58:42,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2021-11-09 10:58:42,312 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-09 10:58:42,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2021-11-09 10:58:42,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2021-11-09 10:58:42,571 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:58:42,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:58:42,657 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-11-09 10:58:42,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 21 [2021-11-09 10:58:42,755 INFO L354 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2021-11-09 10:58:42,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2021-11-09 10:58:42,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 22 [2021-11-09 10:58:43,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2021-11-09 10:58:43,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-11-09 10:58:43,322 INFO L354 Elim1Store]: treesize reduction 57, result has 10.9 percent of original size [2021-11-09 10:58:43,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 72 treesize of output 60 [2021-11-09 10:58:44,340 INFO L354 Elim1Store]: treesize reduction 148, result has 12.9 percent of original size [2021-11-09 10:58:44,340 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 13 case distinctions, treesize of input 104 treesize of output 70 [2021-11-09 10:58:44,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [main_~item~0.offset] [2021-11-09 10:58:44,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-09 10:58:44,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2021-11-09 10:58:44,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965103936] [2021-11-09 10:58:44,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-09 10:58:44,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-09 10:58:44,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-09 10:58:44,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=2156, Unknown=0, NotChecked=0, Total=2352 [2021-11-09 10:58:44,943 INFO L87 Difference]: Start difference. First operand 403 states and 464 transitions. Second operand has 31 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:58:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-09 10:58:49,210 INFO L93 Difference]: Finished difference Result 509 states and 589 transitions. [2021-11-09 10:58:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-09 10:58:49,211 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-11-09 10:58:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-09 10:58:49,213 INFO L225 Difference]: With dead ends: 509 [2021-11-09 10:58:49,213 INFO L226 Difference]: Without dead ends: 509 [2021-11-09 10:58:49,214 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2002 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=716, Invalid=6090, Unknown=0, NotChecked=0, Total=6806 [2021-11-09 10:58:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-11-09 10:58:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 422. [2021-11-09 10:58:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 422 states, 390 states have (on average 1.2461538461538462) internal successors, (486), 418 states have internal predecessors, (486), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:58:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 422 states to 422 states and 489 transitions. [2021-11-09 10:58:49,219 INFO L78 Accepts]: Start accepts. Automaton has 422 states and 489 transitions. Word has length 82 [2021-11-09 10:58:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-09 10:58:49,219 INFO L470 AbstractCegarLoop]: Abstraction has 422 states and 489 transitions. [2021-11-09 10:58:49,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.7241379310344827) internal successors, (79), 29 states have internal predecessors, (79), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-11-09 10:58:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 422 states and 489 transitions. [2021-11-09 10:58:49,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-09 10:58:49,220 INFO L505 BasicCegarLoop]: Found error trace [2021-11-09 10:58:49,220 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-09 10:58:49,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-09 10:58:49,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-09 10:58:49,420 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting mainErr24REQUIRES_VIOLATION === [mainErr0REQUIRES_VIOLATION, mainErr1REQUIRES_VIOLATION, mainErr2REQUIRES_VIOLATION, mainErr3REQUIRES_VIOLATION, mainErr4REQUIRES_VIOLATION (and 65 more)] === [2021-11-09 10:58:49,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-09 10:58:49,421 INFO L85 PathProgramCache]: Analyzing trace with hash 645358060, now seen corresponding path program 1 times [2021-11-09 10:58:49,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-09 10:58:49,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942581007] [2021-11-09 10:58:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:58:49,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-09 10:58:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:58:51,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-11-09 10:58:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-09 10:58:51,857 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-09 10:58:51,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-09 10:58:51,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942581007] [2021-11-09 10:58:51,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942581007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-09 10:58:51,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329169475] [2021-11-09 10:58:51,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-09 10:58:51,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-09 10:58:51,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 [2021-11-09 10:58:51,875 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-09 10:58:51,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f7be3cbb-9590-406d-8ac6-c6d00866e402/bin/uautomizer-IVEQpCNsaX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process